With our boiler ratings, you can compare boiler models side by side using our Head To Head tool. You can compare over fifty models from 32 brands in ten categories such as warranty, efficiency, construction, availability, & where they are made. You can also read the individual reviews of each brand below. Our simple rating system gives each brand a color code and a star rating. If the card is green, then, that is one of the top picks from HvacRepairGuy. If the card is yellow, then, that would be a budget pick from HvacRepairgGuy. If the card is red, then, the brand is not recommended by HvacRepairGuy. These reviews are for gas fired boilers that are used for central heating. With our boiler reviews, you can cut through the sales hype and find value. It truly is like you were taking a repairman shopping with you!
This brand is made in the USA and is backed by a very good warranty but the boilers are only sold through their limited dealer network. The GREENSTAR range offers five sizes of modulating wall-hung or floor standing boilers and they have an integrated three speed pump which simplifies installation and weather compensated control for added energy savings. They have a fully modulating combustion fan which provides optimal combustion air for clean and efficient burning and durable stainless steel burners which resist corrosion. They have an aluminum magnesium silicon composite heat exchanger which is corrosion resistant and provides improved heat transfer as well as requiring less maintenance. These boilers use spark ignition which is less reliable and requires more maintenance than units that use hot surface ignition systems.
This brand is made in the USA but the boilers are only sold through their limited dealer network. The Brute Series of boilers offers high efficiency units with durable stainless steel heat exchangers and burners. They are floor standing boilers with modulating controls and they are available in five sizes to meet the heating needs of virtually any home. They feature a large LCD touchpad display for control and system monitoring but their guarantee is not as good as some of the other brands. They offer an optional pump but it must be field installed which is not as convenient as brands that have factory installed pumps. These boilers use spark ignition which is less reliable and requires more maintenance than units that use hot surface ignition systems.
This brand is a part of Carrier Corp and is available in the USA and Canada but only through their authorized dealers. The PREFERRED SERIES BW3 boilers are induced draft units for easier installation and a little higher efficiency than the LEGACY line. The heat exchangers are made of cast iron and the units have durable stainless steel/titanium burners. They feature intermittent pilot ignition which is less reliable and requires more maintenance than brands that use hot surface ignition. The boilers only have a 84.4% AFUE efficiency rating which means that over 15.5% of the gas is being wasted which is not good for the environment or for the fuel bills.
This brand is made in the USA by Bosch Thermotechnology Corp but the boilers are only available through authorized Bosch contractors in the USA. The GC144 models are designed for replacing old boilers and are available in three sizes. They are floor standing boilers with induced draft and an 85% AFUE efficiency rating but that means that about 15% of the gas is being wasted which is not good for the planet or the pocketbook. The AquaSmart control with its HeatManager function adjusts the boiler water temperature based on heating demand which saves energy but the units use spark to pilot ignition which is less reliable and requires more maintenance than brands that use hot surface ignition. They have silicon injected cast iron heat exchangers with a very good warranty which are better at resisting corrosion and durable stainless steel premix burners.
These boilers are made in Canada and are available internationally through distributors but their guarantee is not as good as some of the other brands. The DynaMax Series offers high efficiency boilers in either wall or floor mount models. They have modulating control and a durable stainless steel heat exchanger. The MicroFlame Series offers sealed combustion boilers that have a durable ceramic burner and a two pass copper tube heat exchanger which resists corrosion but is not as durable as other materials.
This brand is available in the USA and Canada but only through their authorized dealers. The Performance Series BW3 boilers are induced draft units for easier installation and a little higher efficiency than the Comfort line. The heat exchangers are made of cast iron and the units have durable stainless steel/titanium burners. They feature intermittent pilot ignition which is less reliable and requires more maintenance than brands that use hot surface ignition. The boilers only have a 84.4% AFUE efficiency rating which means that over 15.5% of the gas is being wasted which is not good for the environment or for the fuel bills.
These boilers are made in Canada by Granby Industries which is a part of ECR International and the units are sold through their limited dealer network. The MAH series offers four sizes of high efficiency wall mounted boilers. They have an algorithmic control system to maximize efficiency and they have a 95% AFUE combustion efficiency but their guarantee is not very good when compared to other brands. The boilers have gas adaptive technology where they automatically detect the type of gas being used, propane or natural gas. This eliminates having to mess with conversion kits and allows the dealers to hold less inventory.
This brand is from Velocity Boiler Works and they are only available through their limited contractor network but the warranty on this brand (especially on parts other than the heat exchangers) is not as good as many other brands. The Aruba 5 series features basic atmospheric boilers that are made of cast iron. Their draft diverter is mounted on the back of the unit which allows for a more compact unit and more installation flexibility. They are available in eight sizes while the Phantom-X models offers two sizes of high efficiency condensing boilers with modulating controls. They have a durable stainless steel heat exchanger and an LCD touchscreen user interface but they only have an average guarantee.
This brand is from ECR International and is available in the USA but only through a limited dealer network. These boilers use atmospheric combustion which means they take air from inside the home to use for burning the gas. This air has to be replaced by unconditioned air from outside which increases the heating costs for the home. They have cast iron heat exchangers which are susceptible to thermal shock which can result in heat exchanger failure. The XEB series offers five sizes of boiler to match the needs of the home and they have electronic controls but only an 84.4% AFUE efficiency rating. The warranty on this brand is not very good when compared to other brands.
The Supreme H boilers are made in Canada and are distributed throughout North America by King Heating Products Inc. They are wall mounted modulating high efficiency boilers that feature durable stainless steel heat exchangers and an integrated variable speed pump and expansion tank which makes installation easier. They have an outdoor reset control for added energy savings but their warranty is not as good as other brands.
This brand is from Heat Transfer Products which is a part of Ariston Thermo and the boilers are sold through a limited dealer network in the USA & Canada. The Elite Ultra units are wall mounted boilers that have a combustion efficiency of up to 96%. They have a durable stainless steel heat exchanger but their warranty is only average when compared to the other brands. They have built-in Wi-Fi so they can be monitored through their free mobile app and they have an integrated digital control that monitors outside air temperature and algorithmically adjusts the boiler water temperature to maximize efficiency. Their XtraTech heat exchanger delivers enhanced water flow which causes increased turbulence which in turn scrubs the internal walls to minimize scaling. This maintains peak efficiency as well as minimizing required maintenance.
This brand is made in Canada and sold throughout North America but the warranty is only average when compared to the other brands. The VX Series offers three sizes of high efficiency condensing boilers with modulating controls. They are Wi-Fi enabled for remote monitoring and have built-in four zone control which eliminates the need for an external zone control system. They have a durable stainless steel heat exchanger that resists corrosion and an outdoor reset control that adjusts the boiler water temperature based on the outside air temperature to maximize efficiency.
This brand is owned by Bradford White and the units are sold through their limited contractor network. The NeoTherm models are floor standing high efficiency modulating boilers with electronic proportional control where the boiler water temperature is adjusted based on the outside air temperature. They feature a large interface and display and a stainless steel heat exchanger and burner for durability. The FT Series offers three sizes of high efficiency wall hung boilers but the guarantee on the brand is not very good when compared to the other brands.
This brand is made in the USA and the units are available in the USA and Canada but only through their dealer network. The GWB84-IE models are available in six sizes and feature durable titanium burners but they only have an 84% AFUE efficiency rating. The GWB9-IH models are high efficiency floor standing models with durable stainless steel burners that resist corrosion. They use hot surface ignition which is more reliable and requires less maintenance than spark ignition systems.
This brand is made in the USA and is sold through a very limited dealer network. The SOLUTION series offers two stage boilers with stainless steel burners, copper tube heat exchanger, and a ceramic tile combustion chamber for durability. The units can be vented through PVC pipe with an optional kit that includes an inducer motor but they only have an 84% AFUE efficiency. The Noble models are high efficiency wall mounted boilers with modulating smart controls where the boiler water temperature is adjusted based on the outside air temperature. They have a durable stainless steel heat exchanger which resists corrosion and a 95% AFUE efficiency while the Knight WHB models also include a variable speed pump as standard equipment and a better guarantee.
This brand is a subsidiary of Burnham Holdings Inc and the boilers are available through dealers in parts of the USA but they only have an average guarantee when compared to other brands. The CG-F series offers cast iron atmospheric boilers in four sizes. They have intermittent pilots and automatic vent dampers for added efficiency but they use spark to pilot ignition which is not as reliable and requires more maintenance than hot surface ignition systems. The PVCG-C models are induced draft boilers that can be direct vented so a conventional chimney is not required but they only have an 84% AFUE efficiency rating. The GHE-II models are high efficiency boilers that are wall mounted and they feature an integrated pump which makes installation quicker and easier. They have a rate based boiler water temperature reset where the water temperature is adjusted based on the heating rate and they use adaptive combustion technology which ensures a clean efficient burn.
These boilers are made in Canada by NY Thermal Inc and they are backed by a very good warranty but the boilers are only sold through a limited dealer network. The TRX Series offers two sizes of wall mounted high efficiency modulating boilers. All of the internal water connections use bayonet quick connectors so the units are easier and faster to install. The TFTN models are available in four sizes and feature integrated Wi-Fi so they can be remotely monitored and controlled. They have a touchscreen user interface as well as built-in zone control for up to three heating zones and it is expandable up to six zones with an optional kit. The FTVN series models have an integrated variable speed pump with two zone control and built-in Wi-Fi connectivity. The units have outdoor reset control with an outdoor sensor or using the Wi-Fi connection to obtain local weather data.
This brand is made in the USA by PB Heat LLC and the boilers are sold by their authorized dealer network but their guarantee is not very good when compared to some of the other brands. The MI-e series of units are basic atmospheric boilers with durable cast iron construction and a low profile design. They use spark to pilot ignition which is less reliable and can lead to more maintenance and repairs. The PureFire Series models are floor standing high efficiency modulating boilers with an AFUE of up to 96% and a unique condensate management system. They are available in six sizes and feature durable stainless steel construction.
This brand is from ECR International but is only available through a limited dealer network in the USA. The 15B-K models are atmospheric boilers that are available in seven sizes to match most any home's heating needs. They have a built-in vent damper control for energy savings but only an 84% AFUE efficiency rating. They use spark to pilot ignition which is less reliable and requires more maintenance than hot surface ignition systems. The warranty on the brand is not very good when compared to other brands.
This brand is a part of Granby Industries and the boilers are made in Canada. They are only sold through authorized dealers in Canada and parts of the USA and their guarantee is only average when compared to other brands. The DK2 units are basic three pass cast iron boilers that can be vented into an existing chimney or direct vented. The boilers have a Fuel Smart hydrostat control that varies the boiler water temperature based on the heating demand which saves energy but they only have an 87% AFUE efficiency rating.
This brand is made in the USA by Rheem Manufacturing which is a part of the Paloma Group and the boilers are only sold through their limited dealer network. The HI DELTA units use sealed combustion and direct hot surface ignition which is more reliable and requires less maintenance than spark ignition systems. They are two stage units with an 85% AFUE efficiency rating and they have electronic controls with outdoor reset where the boiler water temperature is varied based on the outdoor air temperature which can save energy. The XPAK FT models are wall hung modulating, condensing boilers with a built-in three speed circulator pump and They have a durable stainless steel heat exchanger but their warranty is not very good when compared to other brands.
This brand is made in the USA and offers high efficiency wall-mounted boilers that are sold through their limited dealer network and are backed by a pretty good guarantee. The I-Series models are available in four sizes and feature durable stainless steel self cleaning heat exchangers as well as stainless steel burners. They have an integrated pump for easier and faster installation and they use sealed combustion which saves on home energy usage. They have outdoor reset control where the boiler water temperature is adjusted based on the outside air temperature which saves energy.
This brand is made in Canada by Allied Boilers which is a division of E-Z-Rect Manufacturing Limited. The MINI-GAS series units are atmospheric combustion units that feature a double pass steel finned tube heat exchanger and stainless steel burners. The boilers use spark to pilot ignition which is less reliable and requires more maintenance than hot surface ignition systems. They are available in five sizes to match the needs of any home but the warranty on this brand is not very good when compared to most other brands and they only have an 85% AFUE efficiency rating.
This brand is made in the USA and backed by a decent warranty but their dealer network is mostly in the northeast part of the USA. The CWL models are available in three sizes and include a domestic hot water coil but they only have an 82% AFUE efficiency. The boilers use spark ignition which is less reliable and requires more maintenance than hot surface ignition systems but they have a built-in air scoop which eliminates the air in the water pipes without the addition of a separate air elimination device.
This brand offers a wide variety of boilers that are made of cast iron. They have stainless steel burners for durability and a built-in air separator to keep air out of the system. The Freestyle model is a wall-mounted condensing boiler with modulating ability. They feature a durable stainless steel heat exchanger and are available in three sizes. The warranty on the heat exchanger is good but the guarantee on most other parts is not as good as other brands. The GWA model is a basic boiler that uses atmospheric combustion. It has a large external draft diverter which takes up added space but it has a built-in air separator. The GWI models use a draft inducer which allows for sidewall or chimney venting for flexibility. The brand is available in the USA but only through their factory authorized distributors.
This brand is only available through their limited dealer network in the USA and their guarantee is not very good when compared to other brands. The boilers are high efficiency modulating boilers with durable stainless steel heat exchangers and built-in circulator pumps for quicker and easier installation. The Instinct Solo Floor model is available in three sizes and has Wi-Fi connectivity for remote monitoring while the Instinct Solo Wall models are wall mounted and do not have Wi-Fi as standard equipment. The Prestige Solo models are available in six sizes to meet the heating needs of virtually any home and they are wall hung high efficiency boilers.
This brand is from PurePro Products and is available exclusively through F.W. Webb Company a distributor of HVAC and plumbing supplies in nine states in the northeast part of the USA. The boiler bodies are made by Boyertown Furnace and feature durable cast iron construction. They are three pass low mass boilers that use recirculating flue gas technology for increased efficiency. They can be direct vented for convenient installation and are backed by a pretty good guarantee.
This brand is from ECR International and is sold through authorized dealers in the USA and Canada but their warranty is not very good when compared to other brands. The MAHF models are floor standing high efficiency boilers with AI control tech which automatically sets up the boiler on installation and it automatically adjusts for either LP or natural gas so no conversion kit is required. They are fully modulating to match the home's heat loss and they have a built-in variable speed pump. The UCS240 models are the wall hung version with the same basic features.
This brand is available through a limited dealer network in the USA and they are backed by a very good warranty. They have a three speed pump and modulating control for ultimate energy savings and the burner and heat exchanger are made of stainless steel for durability. They are easily converted from natural to LP gas with the push of a button which means easier installation. The Vitodens 100-W models have a 3.5 inch screen with a 95% AFUE efficiency rating while the Vitodens 200-W models have a 7 inch screen and a 98% efficiency. The Vitocrossal 300 models are high efficiency floor standing boilers with a 95% AFUE efficiency and outdoor reset control where the boiler water temperature is varied based on the outdoor temperature for energy savings. All of the boilers feature their Lambda Pro combustion management system which optimizes the fuel to air mixture for optimal efficiency.
This brand is made in the USA but is only sold through a limited dealer network and their guarantee is not very good when compared to other brands. The Evergreen Pro boilers are condensing/modulating units that can be floor standing or wall-mounted with an optional kit. They are available in five sizes and feature a durable stainless steel heat exchanger. The AquaBalance models are wall hung high efficiency boilers that are available in three sizes but they do not have very advanced control systems when compared to some of the other brands.
This brand offers a wide variety of boilers that are made of cast iron. They have stainless steel burners for durability and a built-in air separator to keep air out of the system. The Freestyle model is a wall-mounted condensing boiler with modulating ability. They feature a durable stainless steel heat exchanger and are available in three sizes. The warranty on the heat exchanger is good but the guarantee on most other parts is not as good as other brands. The GWA model is a basic boiler that uses atmospheric combustion. It has a large external draft diverter which takes up added space but it has a built-in air separator. The GWI models use a draft inducer which allows for sidewall or chimney venting for flexibility. The brand is available in the USA but only through their factory authorized distributors.
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