With our combi boiler ratings, you can compare boiler models side by side using our Head To Head tool.
You can compare 24 models from 21 major 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.
These reviews are for gas fired boilers that produce both domestic hot water and hot water for heating the home. 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 HvacRepairGuy. If the card is red, then, the brand is not recommended by HvacRepairGuy. It truly is like you were taking a repairman shopping with you!
This brand is a part of BDR Thermea Group and the boilers are manufactured in Italy. They are available in the USA and Canada through a limited dealer network. The Duo-tec Compact combi boilers are modulating condensing wall mounted boilers with a 95% AFUE efficiency rating. They have a built in two speed circulating pump as well as an air vent to remove air from the boiler water system. The units have durable stainless steel burners and heat exchangers as well as a state of the art combustion management system. The units have gas adaptive control so that they can burn either propane or natural gas without any modifications to the unit which makes them easier and quicker to install than some of the other brands.
This brand is made in the USA and is backed by a pretty good warranty but the boilers are only sold through their limited dealer network. The Singular models are available in two sizes to match the hot water needs of the home and they have a 95% AFUE efficiency rating. They are wall mounted condensing modulating boilers with a built-in circulator pump. The units require installing a gas conversion kit which is included with the unit for burning propane gas but this takes additional installation time compared to some of the other brands. The units use durable stainless steel heat exchangers but their guarantee is not as good as some of the other brands.
This brand is made in the USA but the boilers are only sold through their limited dealer network. The Brute FT boilers are high efficiency units with durable stainless steel heat exchangers and burners. They use spark ignition which is less reliable and requires more maintenance than units that use hot surface ignition systems. The units are available in two sizes to match the hot water needs of the home and they have modulating controls to closely match the heating demand. They have an outdoor reset control which varies the boiler water temperature based on the outdoor temperature which saves energy and money on utility bills. The guarantee on the heat exchanger, which is the heart of any boiler system, is not very good when compared to other brands.
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 eight sizes of high efficiency boilers in either wall or floor mount models. They have modulating control and a durable stainless steel heat exchanger. They use spark ignition which is less reliable and requires more maintenance than units that use hot surface ignition systems. They have an outdoor reset control which varies the boiler water temperature based on the outdoor temperature which saves energy and money on utility bills.
This brand is from ECR International and is available in the USA but only through a limited dealer network. The brand features high efficiency modulating boilers with durable stainless steel burners and heat exchangers. They have combustion optimizing modulating controls that have gas detection so that they automatically adjust to burn either natural or propane gas. This eliminates the need for a gas conversion kit and allows for quicker and easier installations. The warranty on parts other than the heat exchanger is not very good when compared to other brands. The DCC models are wall mounted while the DCCF units are floor standing.
The Supreme boilers are made in Canada and they are distributed throughout North America by King Heating Products Inc. They feature durable stainless steel heat exchangers and an integrated variable speed pump and expansion tank. They have an outdoor reset control for added energy savings but the guarantee on the units is not very good when compared to other brands.
This brand is a part of Mestek and is assembled in the USA. Their Peak model features stainless steel heat exchangers for durability. They have a built-in air vent and condensate trap for quicker and easier installation as well as modulating controls to closely match the heating requirements. The warranty on parts other than the heat exchanger is not very good when compared to other brands.
These boilers are made in Canada and are sold throughout North America. The units are available in two sizes but their guarantee (especially on the heat exchangers) is not very good when compared to other brands.
This brand is made and sold in Canada through a limited dealer network but their warranty is not as good as some of the other brands that are available. The C series boilers are available in two sizes and they feature digital modulating controls as well as a 95% efficiency rating. The units are wall mounted to save space and they have durable stainless steel burners and ECM inducer motors.
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 EFT boilers are available in either wall mount or floor standing configurations and they feature a built-in two gallon indirect water heater storage tank. They have durable stainless steel heat exchangers but their guarantee is not as good as some of the other brands that are available.
This brand is made in Canada and sold throughout North America. The CX Series offers two 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. The brand is backed by a very good warranty.
This brand is made in the USA but the boilers are only sold through their limited dealer network. The FT Series Wall Combi boilers are high efficiency units with durable stainless steel heat exchangers and burners. They use spark ignition which is less reliable and requires more maintenance than units that use hot surface ignition systems. The units are available in two sizes to match the hot water needs of the home and they have modulating controls to closely match the heating demand. They have an outdoor reset control which varies the boiler water temperature based on the outdoor temperature which saves energy and money on utility bills. The guarantee on the heat exchanger, which is the heart of any boiler system, is not very good when compared to other brands.
This brand is made in the USA but the boilers are only sold through their limited dealer network. The Noble models are available in three sizes and in either wall mount or floor standing models. They feature modulating smart control and durable stainless steel heat exchangers. Their fire tube heat exchangers provide for better heat transfer but the guarantee on the units is not very good when compared to other brands.
The units are made in Canada by NY Thermal Inc and are sold throughout North America. The TRX Series units offer a direct combi-boiler with all of the standard features and a durable stainless steel heat exchanger that is backed by a very good guarantee. They have onboard Wi-Fi for enhanced control options as well as an integrated ECM pump for faster and easier installation. They are available in five sizes to closely match the needs of the home and they have a 96% AFUE combustion efficiency.
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 Series PBC boilers have a 95% AFUE combustion efficiency and they are available in three sizes to more closely match the hot water needs of the home. They have durable stainless steel heat exchangers but they use direct spark ignition which is not as reliable or durable as brands that use hot surface ignition.
This brand is made in the USA and, although they recommend installation by a qualified technician, the units can be purchased through their Amazon store. The i-Series offers three sizes of boilers that have a built-in recirculation pump to ensure that hot water is readily available to all taps. They have durable stainless steel heat exchangers and are backed by a pretty good warranty. The units are capable of multi-zone control and feature outdoor reset controls for energy savings.
This brand is a part of the ACV Group and is available in the U.S. and Canada. The Instinct models are available in two sizes and in either floor standing or wall mount models. They feature onboard Wi-Fi and have a 95% combustion efficiency as well as a durable stainless steel heat exchanger but their guarantee is not as good as some of the other brands. The brand is only available through their limited dealer network.
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 MACF 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 MAC models are the wall hung version with the same basic features.
This brand is made in the USA and features durable stainless steel heat exchanger construction but their warranty on the heat exchanger is not as good as other brands that are available. The Phantom II models feature their Phantom Adaptive Technology which varies the gas and combustion air ratio to maintain top efficiency and allows for operation with either LP or natural gas without a conversion kit. The units use a rate based temperature reset control which does not require an outdoor air sensor but still provides the energy savings. They are available in two sizes to fit virtually any home but they are only available through a limited dealer network.
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 Simplicity boilers are condensing/modulating units that are wall mounted. They are available in three sizes and feature a durable stainless steel heat exchanger and a built in variable speed pump for quicker and easier installation. The units have built-in Wi-Fi for control through their smartphone app and they feature outdoor reset temperature control for energy savings.
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 brand is available in the USA but only through their factory authorized distributors.
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