World's Best Basic Indirect Water Heater

Our top pick is the TRIANGLE TUBE brand which is a part of ACV GROUP. The SMART units feature tank in tank design which provides for great heat transfer and self cleaning of the tank. They are available in seven sizes and backed by a very good warranty.

World's Top Indirect Water Heater

The IBC brand offers a variety of sizes from 30 to 115 gallons in both compact and tall models to fit all kinds of installation conditions. They feature durable all stainless steel construction and are backed by a very good warranty. ibcboiler.com

Other Indirect Water Heater Ratings:

We continue our indirect water heater ratings with an alphabetical list of manufacturers and reviews of their products. 

BRAND--------------------BASIC--PREMIUM

AKVATERM------------------<1*--------<1*

These water heaters use standard tank technology and are made in Finland. They offer a variety of models but their website is not much help and does not have a stated guarantee for their products. akvaterm.fi

ALARKO---------------------<1*--------<1*

This brand is made in Turkey and is available in a wide variety of sizes. They use basic enameled tank technology and offer an optional backup electric element. Their website is not much help and does not have a stated warranty policy. alarko-carrier.com.tr

ALBION---------------------<1*--------<1*

This brand is from KINGSPAN RENEWABLES LTD. and is made and sold in the U.K. The AEROCYL range features copper tanks for corrosion resistance and durability. They are designed for use with heat pumps and solar systems. The warranty on the tanks is just not very good. albionwaterheaters.com

AMTROL-----------------------2*---------NA

The HYDROMAX models are available in two sizes (41 or 80 gallon) and feature digital controls. They have a built-in composite stand so that the units can be installed directly on any floor. The standard warranty is not very good but can be extended. amtrol.com

ANAGES--------------------<1*--------<1*

These tanks are made in Turkey. They offer both stainless steel and enameled tanks but their website is not much help and does not have a stated guarantee. anages.com

ARCA------------------------<1*--------<1*

This brand is available in Europe and uses basic tank technology. They are available in seven sizes to match the needs of the home but the warranty on the tank is not very good when compared to other brands. arcacaldaie.com

ARISTON----------------------1*---------1*

The AQUABRAVO models are available in a variety of sizes and feature durable stainless steel tanks.  ariston.com

ATLANTIC-------------------<1*--------<1*

These water heaters use basic tank technologies and the guarantee on the tanks is not very good when compared to other brands. atlantic-comfort.com

ATTACK----------------------<1*---------NA

These water heaters are made in Slovakia and are sold throughout Europe. The Z PLUS tanks are only available in one size. Their website is not much help and does not have a stated warranty policy. attack.sk

AXEN------------------------<1*---------NA

This brand is made in China and offers stainless steel tanks in sizes from 80 to 600 liters. Their website is not much help and does not have a stated guarantee for their products. axen-heatpump.com

BANDINI--------------------<1*---------NA

These water heaters are made in Italy and are sold in Europe, Asia, North Africa, & the Middle East. They are basic units with backup electrical heating and digital controls. The warranty on the units is not very good when compared to other brands. bandiniwaterheaters.com

BIASI--------------------------1*---------NA

This brand is made in Italy and features durable stainless steel tanks. The brand is available in Europe and is backed by a good warranty. biasi.co.uk

BOCK--------------------------2*---------NA

The SIDEKICK models are basic tanks that use porcelain lined tanks and have an inlet that is designed to minimize sediment buildup. The ENVIROSTOR storage tanks are premium units designed for use with solar water heating systems and have an electric element for backup heating. The standard warranty for this brand is not very good but can be extended. bockwaterheaters.com

BOILERNOVA---------------<1*--------<1*

This brand is made in Italy and offers both units with standard tank technology as well as stainless steel tanks. Their website is not much help and the guarantee on the units is not very good. boilernova.it

BOSCH------------------------5*--------<1*

The WST models are basic units that are available in three sizes and use a ceramic lined tank while the SST models feature a durable stainless steel tank which is preferred. They are both backed by a very good warranty. The SOL-RET units are designed for solar applications and have a backup heating element but the warranty is not as good as other brands. bosch-climate.us

BRADFORD WHITE------------5*---------5*

The POWERSTOR range offers both traditional glass-lined tanks as well as units with stainless steel tanks and coils. They only offer one model in the premium category but all of the units are backed by a very good warranty. bradfordwhite.com

BROTJE-----------------------<1*--------NA

The HYDRO COMFORT EAS models are available in a variety of sizes but their guarantee is not very good when compared to other brands. broetje.de

BUDERUS---------------------3*---------3*

This brand is a part of the BOSCH GROUP. The S & SU series water heaters use basic tank technology while the SST models have durable stainless steel coils and tanks. The SM models are premium units and all of the tanks are backed by a very good warranty. buderus.us

BURNHAM-------------------<1*---------NA

The ALLIANCE SL storage tanks are available in five sizes and feature hydrastone lining (not impressed with this). The heat exchanger can be removed for repair without draining the tank but the warranty is not very good when compared to other brands. usboiler.net

CENTROMETAL-------------<1*--------<1* 

These water storage tanks are made in Croatia and are sold in Europe. The TB models are basic stainless steel tanks that are available in six sizes. The STEB models are premium units that have a built-in electronic solar controller for use with solar water heating systems. Their website does not have a stated warranty policy. centrometal.hr

CHAROT---------------------<1*--------<1*

This brand is made in France. They offer both basic and premium tanks with basic tank technology. Their website is not much help and does not have a stated guarantee for their products. charot.com

COMISA---------------------<1*--------<1*

The COMBOIL water heaters use basic tank technology and are available in sizes from 200 to 1000 liters. The INTEGRA TT tanks are premium units for use with solar water heating systems. Their website is not much help and does not have a stated warranty policy. comisaenergy.it

COPPERFORM-----------------1*---------1*

This brand is from KINGSPAN RENEWABLES and is made and sold in the U.K. The FLOMASTER range offers four sizes of storage tanks (180,210,250,300 liters) and has a pretty good guarantee. kingspanenviro.com

CORDIVARI------------------<1*-------<1*

This brand offers basic units but their website is not much help and does not have a stated warranty policy. The brand is made in Italy. cordivari.it

COTERM---------------------<1*-------<1*

These water heaters are made in Italy. They use basic tank technology but are available in a wide variety of sizes to match the needs of the home. Their website is not much help and does not have a stated warranty policy. coterm.it

CROWN-----------------------1*---------NA

This brand is made and sold in the U.K. The ENDURANCE line offers seven sizes of tanks to match the needs of the home. The tank is made of stainless steel for durability and is backed by a good guarantee. crownwaterheaters.co.uk

CROWN BOILER------------<1*--------<1*

The MAXI-THERM 2 units are available in sizes from 40 to 114 gallon to match the hot water requirements of the home. They have porcelain lined tanks for corrosion control. The MEGA-STOR series offers units with stainless steel tanks for durability and corrosion control. The warranty in the BASIC category is not very good. Their solar models are available in two sizes and have a good warranty. crownboiler.com

DEJONG---------------------<1*--------<1*

These water heaters are made in the Netherlands and are sold worldwide. They offer a wide variety of models including floor standing and wall hung models. They feature stainless steel construction for durability but their website does not have a stated guarantee for their products. djg.com

DIMPLEX----------------------1*---------1* 

The EC-EAU models are basic units that are designed to be used with their air source heat pumps. They are available in two sizes and have a durable stainless steel tank and a highly efficient corrugated coil. The tanks are backed by a pretty good warranty. dimplex.co.uk

DOMOTEC-------------------<1*---------NA

This brand offers water heaters in sizes from 200 to 1000 liters but they use old enameled tank technology. Their website is not much help and does not have a stated guarantee for their products. domotec.ch

DOMUSA--------------------<1*---------NA

This brand is made in Spain and is a part of MONDRAGON CORPORATION. The units are available in four sizes and offer optional electric elements. They have durable stainless steel tanks but their website is not much help and does not have a stated guarantee for the units. domusa.es

DONPER--------------------<1*--------<1*

These water heaters feature durable stainless steel tanks and are available in many different models. They are made in China and their website is not much help. ensolar.donper.com

DRAZICE--------------------<1*---------NA

These tanks are made in the Czech Republic and sold throughout Europe. The brand is a part of NIBE ENERGY SYSTEMS and offers a variety of sizes from 80 to 1000 liters. The warranty is not as good as many brands. dzd.cz

DUNKIRK---------------------5*----------5*

This brand is a part of ECR INTERNATIONAL. The H20I tanks are made of stainless steel and are backed by a very good warranty. They are available in a variety of sizes to match the needs of any home. dunkirk.com

ECO KING--------------------5*----------5*

This brand is distributed throughout North America by KING HEATING PRODUCTS INC. The units feature stainless steel tanks and coils for durability and are backed by a very good warranty. They have a unique five inch inspection/cleaning hatch for maintenance. ecokingheating.com

EHC--------------------------1*----------NA

The NEPTUNE storage tanks are available in Europe. They are available in six sizes to match the hot water needs of the home and feature durable stainless steel construction. They are backed by a good guarantee and can be purchased directly online from their website. electric-heatingcompany.co.uk

ELDOM---------------------<1*---------<1*

This brand offers both wall mounted and freestanding models. They offer both basic enameled tanks as well as durable stainless steel models. The brand is made in Bulgaria and the warranty is not very good when compared to other brands. eldominvest.com

ELSON-----------------------1*-----------1*

The ZIRCON range is made by HEATRAE SADIA which is a part of BDR THERMEA. They have backup electric elements and are made of durable stainless steel. The units are backed by a good guarantee. elsonhotwater.co.uk

EMMETI--------------------<1*---------<1*

This brand is made and sold in Italy. They use old enameled tank technology and their website does not have a stated guarantee for their products. emmeti.com

ERASLAN------------------<1*---------<1* 

This brand is made in Turkey and offers a variety of sizes of tanks. Their website is not much help and does not have a stated guarantee for their products. eraslan.com.tr

EXCELSIOR------------------1*-----------1*

These water heaters are made by FABDEC and feature durable stainless steel tanks. They offer a large selection of sizes in both standard and slimline models and are backed by a good warranty. unventedwaterheaters.com

FERROLI--------------------<1*--------<1*

This brand is made in Italy and is sold throughout Europe. The BF range offers basic tanks in five sizes to match the needs of the home. The ECOUNIT F model offers both basic and premium tanks but their website is not much help and does not have a stated warranty policy. ferroli.it

FLAMCO---------------------<1*--------<1*

This brand offers a wide selection of models but their website is not much help and does not have a stated guarantee for their products. flamcogroup.com

FLOWMAX--------------------NA--------<1*

These water heaters are made in Canada and sold throughout North America. They offer two sizes of tanks (200 liter or 300 liter). Their website is not much help and does not have a stated warranty policy. flowmaxtechnologies.com

FONDITAL-------------------<1*--------<1*

The WHPS units have basic glass lined tanks. Their website does not have a guarantee on the units. fondital.it

GALMET---------------------<1*---------NA

This brand is made and sold in Poland. They feature basic tank technology and are available in only three sizes. The warranty on the units is not very good and requires periodic maintenance by professionals. galmet.com.pl

GEOSTORE------------------<1*---------NA

This brand is from GEOSTAR which is a division of WATER FURNACE INTERNATIONAL. They are basic tanks that are designed to be used with their geothermal heating systems. They are only available in two sizes and use basic tank technology. geostar-geo.com

GLEDHILL---------------------1*---------1*

These water heaters are made in the U.K. and sold in Europe. The Stainless Lite Indirect units are available in 8 sizes to match the home's requirements and they have a backup electric element. The Slimline Series is a good bet for tight spaces. Their Stainless Lite Triple Coil units are premium models for open vented domestic water systems and can use multiple heat sources. The brand uses high efficiency corrugated tube construction and has a good warranty. gledhill.net

GLOBAL ENERGY SYSTEMS--<1*------<1*

This brand is made in the U.K. The ECO STORE units feature durable stainless steel tanks but their guarantee is not very good when compared to other brands. globalenergysystems.co.uk

GMO------------------------<1*--------<1*

This brand is made in China and is available in sizes from 50 to 500 liters. They use basic tank technology and their website is not much help. gmohitech.com

GORENJE-------------------<1*--------<1*

These units are available in four sizes and with either one or two heat exchangers. They use basic enameled tank technology. gorenje.com

GRANT---------------------<1*--------<1*  

This brand is made and sold in the U.K. The DUOWAVE RANGE offers a variety of models and sizes featuring durable stainless steel tanks. They have corrugated coils for better heat transfer but their guarantee is not very good when compared to other brands. grantuk.com

HARREITHER----------------<1*---------NA

The COMBI STAR  HLS series tanks are available in two sizes and feature basic technology. The water heaters are made in Austria and sold in Europe. Their website is not much help and does not have a stated guarantee for their products. harreither.com

HEAT-FLO --------------------5*----------5*

This brand is made in the USA and features stainless steel construction. They are available in five sizes from 30 to 115 gallons and basic as well as solar tanks. They are backed by a very good warranty. heat-flo.com

HEATRAE SADIA-------------1*----------NA

The MEGALIFE HE range is available in five sizes and features durable stainless steel heat exchangers. They are made in the U.K. and are backed by a good guarantee. heatraesadia.com

HEATSTORE----------------<1*----------NA

This brand is made and sold in the U.K. The HSUIC models are basic tanks that are available in seven sizes. The guarantee on the units is not very good when compared to other brands. heatstore.co.uk

HEKIA----------------------<1*---------<1*

These water heaters are made and sold in France. They use basic tank technology and the warranty is not very good when compared to other brands. hekia.fr

HELIONAL------------------<1*---------<1*

The HBS series offers units with basic tank technology while the E SERIES offers tanks made of stainless steel for durability. The TMAX series is specifically designed for use with heat pumps. The guarantee on the tanks is not very good when compared to other brands. helional.com

HERZ-----------------------<1*----------NA

These water heaters are available in sizes from 300 to 1000 liters. Their website is not much help and does not have a stated guarantee for them. herz-energie.at

HEWALEX-------------------NA---------<1* 

This brand is made in Poland and is sold throughout Europe. The VF series units use basic tank technology but are available in a wide variety of sizes. Their website is not much help and does not have a stated warranty policy. hewalex.eu

HIDROS--------------------<1*---------<1*

These tanks are made in Italy and sold in Europe. The TW-TWS range offers a variety of sizes but they use old enameled tank technology. Their website is not much help and does not have a stated warranty policy. hidros.eu

HOIAX---------------------<1*---------<1*

This brand is a part of NIBE ENERGY SYSTEMS and is made in Norway. They offer a wide selection of tanks and feature stainless steel construction for durability. Their website is not much help and does not have a stated guarantee. hoiax.no

HOVAL---------------------<1*---------<1*

These water heaters are available in either glass lined tank or stainless steel tank models. Their website is not much help and does not have a stated warranty policy. hoval.ch

HTP---------------------------5*----------NA

The SUPERSTOR CONTENDER units are glass lined and are not recommended but the ULTRA models are made of stainless steel and backed by a very good warranty. They are available in six sizes from 20 to 119 gallons to match the needs of any home. htproducts.com

HUBBELL-------------------<1*----------NA

The TRANSFLOW units feature their hydrastone lining (not really impressed with that) and are available in a variety of sizes. The guarantee on the tanks is not very good when compared to other brands. hubbellheaters.com

HUCH---------------------<1*----------<1*

These water heaters are available in a wide variety of models and sizes. They use basic enameled tank technology and their website is not much help. huch.com

IBC--------------------------5*-----------5*

This brand offers a variety of sizes from 30 to 115 gallons in both compact and tall models to fit all kinds of installation conditions. They feature durable all stainless steel construction and are backed by a very good warranty. ibcboiler.com

IVT-------------------------<1*---------<1*

This brand offers both basic and premium tanks but their website is not much help. ivt.se

JOHNSON & STARLEY--------1*---------NA

These water heaters are made and sold in the U.K. The AQUASTAR PREMIER units feature durable stainless steel tanks and are available in sizes from 90 to 300 liters. They have a backup heating element and are backed by a decent guarantee. johnsonandstarley.co.uk

JOULE-----------------------1*----------1*  

This brand is made and sold in Ireland. The CYCLONE INDIRECT models feature durable stainless steel construction and are available in eight standard sizes. They also offer twin, triple, and quad coil models to fit every application. The units are backed by a good warranty. joule.ie

KNV-------------------------<1*----------NA

This brand is a part of the NIBE GROUP and is available in Europe. The GREENWATER line offers three sizes of basic tanks using old enameled tank technology. The units are designed for use with their heat pumps but their website is not much help and does not have a stated guarantee for their products. knv.at

KOSPEL---------------------<1*--------<1*

These water heaters are made in Poland and use basic enameled tank technology. Their website is not much help and does not have a stated warranty policy. kospel.pl

LAARS-------------------------5*---------NA

The LAARS-STOR water heaters are available with standard tank technology or in stainless steel models. They are available in a variety of sizes and are backed by a very good guarantee. The brand is a part of BRADFORD WHITE CORP. laars.com

LAILEY & COATES-------------1*---------1*

This brand is made and sold in the U.K. The THERMOSURE range features stainless steel construction and highly efficient corrugated heat transfer coils. The brand is backed by a good guarantee. laileyandcoates.co.uk

LAMBORGHINI-------------<1*--------<1*

These water heaters are available in a variety of models but their website is not much help and does not have a stated warranty policy. lamborghinicalor.it

LAPESA---------------------<1*--------<1*

This brand is made in Spain. The GX series uses tank in tank technology with the tanks made of durable stainless steel. Their website is not much help and does not have a stated guarantee for their products. lapesa.es

LASIAN--------------------<1*---------<1*

These units are made and sold in Spain. The basic models are available in wall-hung or floor standing models while the AQUA SELECT DUO is a premium floor standing water heater. They use basic tank technology and their website does not have a stated warranty policy. lasian.es

LIGNO----------------------<1*--------<1*

This brand is made in Austria and is sold throughout Europe. They offer water heaters that use basic enameled tank technology. Their website is not much help and does not have a stated warranty policy. ligno.at

LOCHINVAR-----------------5*---------<1*

The SQUIRE line of indirect water heaters offers six sizes of basic models as well as six sizes of premium tanks. They feature stainless steel coils for durability. The basic models are backed by a much better warranty than the dual coil models even though it is hard to see a reason for the difference. lochinvar.com

MAIN----------------------<1*----------NA 

This brand is available in the U.K. and is a part of BDR THERMEA. They offer six sizes of water heaters featuring stainless steel tanks with backup electric elements. The warranty is not very good when compared to other brands. mainheating.co.uk

MHS------------------------<1*---------<1*

These water heaters are made and sold in the U.K. and the brand is a part of ARISTON THERMO. The VISITRON AB models have durable stainless steel tanks but their website does not have a stated guarantee for the units. elco.co.uk

MINT-------------------------NA---------<1*

This brand is made and sold in the U.K. They offer water heaters for use with solar water heating systems. They feature stainless steel construction for durability but their website is not much help and does not have a stated warranty policy. mintrenewables.co.uk

NEW YORKER--------------<1*----------NA

This brand is a subsidiary of BURNHAM HOLDINGS INC. The LINK SL units are available in five sizes and feature hydrastone lining (not impressed with this). The heat exchanger can be removed for repair without draining the tank but the warranty is not very good when compared to other brands. newyorkerboiler.com

NIBE-----------------------<1*---------<1*

This brand offers a wide selection of models and sizes of tanks. Their website is not much help and does not have a stated guarantee for their products. nibe.eu

NTI--------------------------5*-----------NA

These water heaters are made in Canada and are backed by a very good warranty. The S models use stainless steel tanks while the SL models use a stone lining for protection from corrosion. nythermal.com

OLSEN-----------------------5*-----------5*

This brand is a part of ECR INTERNATIONAL and the units are sold in Canada. The H2OI line offers both single coil and dual coil tanks. They are made of durable stainless steel and are backed by a very good warranty. The dual coil models offer a backup electric heating option. olsenhvac.com

OSO------------------------<1*---------<1*

The SUPER COIL models are basic units that are designed to be used with a boiler system. The ECOLINE is made for use with heat pumps and solar panels. The tanks are made of durable stainless steel but the warranty is not as good as many other brands. osohotwater.com

PEERLESS-------------------5*-----------NA

These units are from PB HEAT LLC and are backed by a very good warranty. The PEERLESS PARTNER storage tanks are available in five sizes and feature durable stainless steel tanks. They have a cupronickel coil which is resistant to scaling and positioned in the tank to eliminate the need for chemical cleaning. The LO-BOY model is a compact unit that is designed to sit under their high efficiency boilers. The bad part about their warranty is that you must keep your receipt of purchase. peerlessboilers.com

PENNCO-----------------------5*---------NA

From ECR INTERNATIONAL, this brand features Hotline storage tanks that are available in five sizes. They use basic technology including magnesium anode rods for corrosion prevention but they are backed by a very good warranty. penncoboilers.com

PUREPRO-------------------<1*----------NA

This brand is made exclusively for F.W. WEBB COMPANY, a plumbing distributor serving nine states in the northeast part of the USA. The PRO 100 CT units include a pre-installed mixing valve while the PLUG N' GO PLUS units have a factory installed circulator pump for easier installations. The PIPE N' GO models are available in either 41 or 80 gallon sizes and all of the water heaters are made with poly bottle construction for corrosion resistance. The standard warranty on the brand is not very good when compared to other brands but it can be extended. pureproproducts.com

RADIANT-------------------<1*---------<1*

These water heaters are made and sold in Italy. They use basic tank technology and their website is not much help. radiant.it

RANGE------------------------1*----------1*

This brand is a part of KINGSPAN HOT WATER SYSTEMS LTD and is made/sold in the U.K. The ECOCYL models are basic tanks while the TRIBUNE HE SOLAR are premium units. The brand features durable stainless steel tanks and coils. kingspanenviro.com

REDRING-------------------<1*----------NA

These water heaters are made in the U.K. and feature durable stainless steel tanks. They are available in sizes from 90 to 300 liters but the guarantee is not very good when compared to other brands. redring.co.uk

RHEEM---------------------<1*----------NA

The SOLARAIDE HE units are available with or without an electric element. They feature basic glass lined tank technology with an anode rod and are available in 80 or 120 gallon sizes. The warranty is not very good when compared to other brands. rheem.com

ROTEX----------------------<1*--------<1*

This brand is made in Germany and is available throughout Europe. The units are different in that the domestic hot water is circulated inside the coil instead of held in the tank. Their website is not much help and does not have a stated warranty policy. rotex-heating.com

RUUD------------------------<1*---------NA

The SOLAR SERVANT SERIES offers units with or without an electric element. They feature basic glass lined tank technology with an anode rod and are available in 80 or 120 gallon sizes. The brand is a part of RHEEM MANUFACTURING but the warranty is not very good when compared to other brands. ruud.com

SILE-----------------------<1*---------<1* 

The VERTINOX E  models are basic water heaters with durable stainless steel tank and heat exchanger. The heat exchanger is easily removed for service or repair. The TA BI units have an internal tank for domestic hot water but their website is not much help and does not have a stated guarantee for their products. sile.it

SLANT/FIN------------------<1*---------NA

The HWT models are glass-lined tanks that are designed for use with their central heating boilers. They are only available in three sizes and the warranty is not very good when compared to other brands. slantfin.com

SOLARFOCUS---------------<1*--------<1*

The ECOLINE features units that use standard enameled tank technology. Their website does not have a stated guarantee for the units. solarfocus.eu

STEP------------------------<1*--------<1*

The BVT series water heaters use basic enameled tank technology and the guarantee on the units is not very good when compared to other brands. stepclima.it

STIEBEL ELTRON-------------4*---------4*

The SB/SBB series features porcelain lined tanks and a sacrificial anode with a wear indicator. The basic models are available in four sizes from 150 to 400 gallon while the premium units are available in 300, 400, or 600 gallon sizes. The warranty on the units is very good. stiebel-eltron-usa.com 

SUNSYSTEM----------------<1*--------<1*

This brand is made in Bulgaria by NES LTD and sold throughout Europe. The SWP line offers both basic and premium water heaters but they use old tank technology with enamel and anode rods. They are available in wall-hung models as well as floor-standing units. Their website is not much help and does not have a stated warranty policy. sunsystem.bg

SUPER HOT-----------------<1*--------<1*

This brand is from ALLIED ENGINEERING CO. and is made in Canada. The EFFICIENCY PLUS SERIES features stainless steel tanks and coils for durability. They are available in four sizes but the guarantee is not as good as some of the other brands. alliedboilers.com

TECHTANIUM----------------<1*-------<1*

These water heaters are made by DIVERSIFIED HEAT TRANSFER. The MP SERIES units can be either wall or floor mounted and are available in four sizes. The solar tanks are available with either electric backup or with an additional coil. The warranty on the units is not very good when compared to other brands. dhtnet.com

TEMPEST--------------------5*-----------5*

This brand which is a part of TELFORD GROUP is made and sold in the U.K. They feature stainless steel construction for durability and are backed by a lifetime guarantee. telford-group.com  

THERMOR-----------------<1*----------<1*

These tanks are made in France and sold in Europe. The STEATITE PRO range offers tanks that use basic enameled tank technology and the BIOPACK units are dual coil tanks. This is old technology and their guarantee is not as good as many brands. thermor-heating.com

THERMOSURE------------------1*--------1*

These water heaters feature durable stainless steel tanks and a backup electric heater. They are made and sold in the U.K. and are backed by a good guarantee. laileyandcoates.co.uk

THERMSAVER------------------1*--------1*

This brand offers units with durable stainless steel tanks that are backed with a good warranty.thermsaver.co.uk

TONON FORTY---------------<1*-------<1*

This brand is made in Italy and sold throughout Europe. They offer a variety of models but their website is not much help and does not have a stated guarantee for their products. tonon.it

TOPMAX----------------------<1*-------<1*

These tanks are made and sold in the Czech Republic. They use basic tank technology and the warranty is not very good when compared to other brands. topmax.eu

TRIANGLE TUBE---------------5*-------<1*

This brand is a part of ACV GROUP and the SMART units feature tank in tank design which provides for great heat transfer and self cleaning of the tank. They are available in seven sizes and backed by a very good warranty. The SMART MULTI ENERGY TANK is a premium unit that adds a coil type heat exchanger in the bottom of the tank. The warranty in this category is not very good. triangletube.com

UNICAL------------------------NA-------<1*

These water heaters use basic tank technology with magnesium anodes. Their website is not much help and does not have a stated guarantee for their products. unicalboiler.com

UTICA-------------------------5*--------<1*

The H20 units are basic water heaters that are available in 8 sizes and feature stainless steel tanks. They are backed by a very good guarantee. The H20I models are premium units but their guarantee is not as good as many brands. uticaboilers.com

VAILLANT-------------------<1*--------<1*

The UNISTOR range offers basic units with a 70 liter wall-hung model and six sizes of floor standing units. The AUROSTOR model is a premium unit that features stainless steel construction for durability. Their website does not have a stated warranty policy. vaillant-export.com

VAUGHN--------------------<1*----------NA

The TOP PERFORMER PLUS SERIES offers basic units with their hydrastone lining for corrosion resistance. They are available in sizes from 35 to 70 gallons but the warranty on the tanks is not very good when compared to other brands. vaughncorp.com

VIADRUS-------------------<1*--------<1*

This brand is made in the Czech Republic and sold worldwide. They use basic tank technology with magnesium anode rods. Their website is not much help and does not have a stated guarantee on the products. viadrus.cz

VIESSMANN-------------------5*---------5*

The VITOCELL 100 series units feature basic glass-lined tank technology and are not recommended. The 300 series features durable stainless steel tanks that are backed by a lifetime guarantee. They offer both horizontal and vertical models. viessmann-us.com

VOKERA-----------------------1*---------1*

This brand is a part of the RIELLO GROUP and is sold in the U.K. and Ireland. The AquaFlow units feature a twenty five year guarantee on the tanks and are available in four sizes to match the needs of the homevokera.co.uk

VOLUND--------------------<1*--------<1*

The WAYLAND QS is a basic tank with enameled steel construction and is available in two sizes. The WAYLAND QMS is a premium tank but their website is not much help and does not have a stated guarantee for their products. The brand is available in Denmark and is a part of the NIBE GROUP. volundvt.dk

WALLNOFER H.F.-------------<1*--------NA

The LOGIX24 units are designed to work with their solar thermal panels and feature a stainless steel heat exchanger. The units are available in Europe, Asia, and North America but their website does not have a stated warranty policy. wallnoefer.it

WATERKOTTE--------------<1*----------NA

This brand offers basic teflon coated tanks. Their website is not much help and does not have a stated guarantee for their products. waterkotte.de

WEIL-MCLAIN-----------------5*---------NA

These water heaters are made in the USA and feature stainless steel construction for durability. The AQUA PLUS models are available in five sizes from 35 to 105 gallons to meet the needs of any size home. They have an inspection port for maintenance and a magnesium anode for corrosion protection. They have a large diameter heat exchanger that allows for quick production of hot water. They are backed by a great warranty. weil-mclain.com

WESTINGHOUSE-------------<1*--------NA

This brand is made by HTP and is available in six sizes from 30 to 100 gallons. They feature durable stainless steel construction but their guarantee is not very good when compared to other brands. westinghousewaterheating.com

WINDHAGER----------------<1*--------<1*

This brand is made in Austria. The AquaWin units are basic storage tanks that are available in three sizes while the AquaWin Solar model is a premium tank. They use standard enameled tank technology and their website does not have a stated guarantee for the units. windhager.com

WIRBEL----------------------<1*---------NA

The CAS water heaters are made in Austria and have durable stainless steel heat exchangers. They are available in five sizes but the website does not have a stated warranty policy. wirbel-shop.ru

WOLF-----------------------<1*--------<1*

This brand features old tank technology and the warranty on the units is not very good when compared to other brands. wolf-heiztechnik.de

WORCESTER------------------1*---------1*

The GREENSTORE tanks are available in a variety of sizes but their website is not much help. The brand is a part of the BOSCH GROUP and the units are backed by a decent warranty. worcester-bosch.co.uk

ZANTIA--------------------<1*---------<1*

This brand offers a variety of models with either stainless, copper, or basic enameled tanks. They are available in sizes from 80 to 500 liters but their website does not have a stated guarantee on the units. zantia.com

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