10 Best Condensing Boilers

Rinnai

Rinnai Q205SN 205K BTU Natural Gas Condensing Boiler

9.8

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1 Best deal!

Product highlights

Flexible venting options with approved concentric, pvc, cpvc, stainless steel, polypropylene (rigid and flex), for single-pipe exhaust, room air and two-pipe systems
Compact wall-mounted design saves space over traditional boilers
Rinnai q205sn - natural gas condensing boiler
Stainless steel primary boiler heat exchanger for unmatched performance and durability; copper nickel integrated dhw plate heat exchanger
Features an integrated modulating pump, and outdoor reset sensor (in the box)

Nti

NTI-TX200A- Trinity Condensing Boiler 2.52-200 MBTU

9.4

Awesome

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Product highlights

Built with a patented ferritic stainless steel heat exchanger. superior controllabiltiy with the tx controller.
Advanced integrated controls with fully automatic modulation, outdoor reset, lead-lag capable, low pressure cutoff, outdoor reset boost feature and diagnostic logging.
Fully modulating with 5:1 turndown. pre-wired for use with indirect water heaters.
Freeze protection with automatic warm weather shutdown. rated input: 24,900 to 199,000 btu/h. rated output: 184,000 btu/h
Please note: in order to purchase this product, we would need an assurance this product will be installed by a licensed gas technician for safety purposes. details would be required before shipping to make sure the technician/the company is registered to install this product. thanks for cooperation.

SERIES II

UTICA UBSSC-299/UTUBSSCA299NA0AAA 60,000 BTUSERIES II GAS-FIRED WALL HUNG MODULATING CONDENSING NATURAL GAS BOILER/LESS

9.1

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Product highlights

Mawp water:150 psi / max water temperature:195f / ignition:direct spark
Minimum relief valve capacity:300lbs/hr / input/output btu's:60,000/57,000 / net ahri rating water:245 mbh / gas supply pressure min/max:13.5w.c./3w.c
Volts:120 / phase:1 / efficiency:95% / flue size:3 diameter
Gas connection:3/4 n.p.t. / return/supply water connection:1 1/4 n.p.t. / condensate drain connection:3/4 n.p.t.
Made in usa

Nti

NTI-TFT399- Condensing Boiler 399BTU

8.8

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Product highlights

Ultimate controllability with advanced sola controller. detailed troubleshooting information (selfdiagnostic display)
Stainless steel internal water piping with certified internal low water cut-off with test button. fully-modulating combustion system
High efficiency condensing boiler stainless steel down-fired fire tube design
Outdoor reset temperature operation increases boiler and system efficiency. ability to control three separate temperature set please note: in order to purchase this product, we would need an assurance this product will be installed by a licensed gas technician for safety purposes. details would be required before shipping to make sure the technician/the company is regis...
The 7 colour touchscreen provides for easy programming and control. the windows-like touchscreen allows quick setup with user-friendly screen displays and options.

BIC

IBC Condensing Boiler, HC Series- HC20-125 - 20,000 to 125,000 BTU/HR

8.6

Great

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Product highlights

Built-in boiler pump with full asme-rated vessel. up to 95% afue
Heating capacity: 20,000 to 125,000 btu/hr.
Unique and innovative single pass copper / aluminum heat exchanger, ensuring greater efficiency and eliminating water side corrosion.
Includes air vent, outdoor sensor & relief valve for better reliability and durability.
Please note: in order to purchase this product, we would need an assurance this product is being installed by a licensed gas technician for safety purposes. details would be required before shipping to make sure the technician/the company is registered to install this product. thanks for cooperation.

TAKAGI

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per

8.2

Great

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Product highlights

Computerized safety features, no pilot light to have to worry about
Endless hot water, on-demand usage, compact, space saving, energy conservation
Satisfies the 2012 scaqmd rule 1146.2 for ultra-low nox emissions

BIC

IBC Condensing Boiler, HC Series- HC15-96 - 15,000 to 96,000 BTU/HR

8

Very Good

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Product highlights

Built-in boiler pump with full asme-rated vessel. up to 95% afue
Heating capacity: 15,000 to 96,000 btu/hr.
Unique and innovative single pass copper / aluminum heat exchanger, ensuring greater efficiency and eliminating water side corrosion.
Includes air vent, outdoor sensor & relief valve for better reliability and durability.
Please note: in order to purchase this product, we would need an assurance this product is being installed by a licensed gas technician for safety purposes. details would be required before shipping to make sure the technician/the company is registered to install this product. thanks for cooperation.

MWC MAUI

CROWN BOILER CO. MWC116ELLW1PSU 116,000 BTUMWC MAUI SERIES PROPANE GAS-FIRED HOT WATER DIRECT

7.6

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Product highlights

Input btu:116,000 / efficiency:85% / flue size:4
Max operating pressure:30 psi / max water temperature:176°f
Volts:120 / hertz:60 / phase:1
Doe heating output capacity:102,000 / i=b=r net rating output:89,000
Product requires:vent kit model:340500 (not included

Rinnai

Rinnai E75CP 75K BTU Propane Condensing Boiler

7.4

Very Good

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Product highlights

Stainless steel primary boiler heat exchanger
Compact wall-mounted design saves space over traditional boilers
96.5% afue rating
Copper nickel integrated secondary plate exchanger
Integrated single-speed pump and expansion tank

Rinnai

Rinnai Q85SN 85,000 BTU Natural Gas Condensing Boiler

7

Good

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Product highlights

Qualifies for federal tax credit
Compact wall-mounted design saves space over traditional boilers
Fully modulating pump combines with stainless steel heat exchanger to make this one of the more efficient units available
Minimum/maximum gas rate input (heating): 17,000-85,000 btu
Optional 3-way valve available to eliminate the need for a pump for the indirect tank

Buying guide

When it comes to selecting the right condensing boilers, you definitely want to research:

What makes any particular condensing boilers best?
How to choose the right condensing boilers within your budget?
What is the average price of a good condensing boilers?

Answering these questions is not simple as there are too many choices and too many data to process. In this particular situation our data analysis platform comes handy.

We analyze thousands of user reviews and products to generate usability score for each brand. This usability score considers product benefits, price and customer feedbacks to provide you with a unbiased list of 10 best affordable condensing boilers to buy.

You may read about our algorithm and process in detail at our about page. For any question or suggestion, do not hesitate to contact us.

10 Best Condensing Boilers

Rinnai

9.8

Product highlights

Nti

9.4

Product highlights

SERIES II

9.1

Product highlights

Nti

8.8

Product highlights

BIC

8.6

Product highlights

TAKAGI

8.2

Product highlights

BIC

8

Product highlights

MWC MAUI

7.6

Product highlights

Rinnai

7.4

Product highlights

Rinnai

7

Product highlights

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