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Heating Boilers Gas Comparison - May 2026
| 1 Best Choice  9.7Exceptional | 2  9.6Exceptional | 3  9.5Excellent | 4 Best Value  9.4Excellent | 5 9.3Excellent | 6 9.2Excellent | 7 9.1Excellent |
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ModelNoritz NRCB199DV-LP Indoor Direct Vent Combination Boiler (Standard Vent Convertible) with Built-In Pump, Max 199, 900 Btuh Dhw, 11.1 Gpm, 120, 000 Btuh Space Heating - Propane | Model Combi Boiler CH 150K BTU/DHW 199K BTU | Model Rinnai i150SN Condensing Gas Boiler, Whole Home Natural Gas Heater with Space-Saving Design and Smart Features, (150K BTU) | Model Gas Heating: Furnaces, Boilers, Controls, Components | Model Combi Boiler CH 90K BTU/DHW 199K BTU | Model Combi Boiler CH 60K BTU/DHW 160K BTU | Model Solo Boiler CH 90K BTU |
BrandNoritz | Brand Rinnai | Brand Rinnai | Brand ESCO Press | Brand Rinnai | Brand Rinnai | Brand Rinnai |
Reviews | Reviews - | Reviews  | Reviews | Reviews - | Reviews - | Reviews - |
Tech Specs | ||||||
item weight 95 pounds | item weight 82.7 pounds | item weight 68.3 pounds | item weight 1.25 pounds | item weight - | item weight 79.4 pounds | item weight - |
color- | color Gray | color i150SN - Natural Gas | color - | color Gray | color Gray | color Gray |
product dimensions 12.8 x 18.5 x 27 inches | product dimensions 18.5W x 26.4H | product dimensions 18.5W x 26.4H | product dimensions - | product dimensions - | product dimensions 18.5W x 26.4H | product dimensions - |
power source- | power source gas powered | power source - | power source - | power source gas powered | power source gas powered | power source gas powered |
Available On   | Available On  | Available On | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.7
1
NoritzNoritz NRCB199DV-LP Indoor Direct Vent Combination Boiler (Standard Vent Convertible) with Built-In Pump, Max 199, 900 Btuh Dhw, 11.1 Gpm, 120, 000 Btuh Space Heating - Propane
Main highlights- Superior temperature stability for domestic hot water
- Simultaneous domestic hot water and heating
- Noritz accessory
- Easy to install with new wall bracket
- Clean burner
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9.6
2Rinnai
Combi Boiler CH 150K BTU/DHW 199K BTU
Main highlights- Versatile Fuel Options: With Smart Sense Adaptive Gas Valve technology, the I-Series Plus is designed to accommodate natural gas or propane, ensuring compatibility with a wide range of heating setups to meet diverse customer needs
- Unmatched Energy Efficiency: The Rinnai I-Series Plus Water Boiler provides significant energy savings with up to a 96% AFUE rating, making it an excellent choice for cost-conscious professionals
- Smart Home Compatibility: Featuring Smart Connect technology, these Rinnai Combi Boilers offer Wi-Fi remote access and Bluetooth connectivity through the Rinnai Central App, allowing for convenient monitoring and management
- Compact and Installation-Friendly Design: The Rinnai Combi Boiler boasts a compact build and easy installation, with 2-inch venting capabilities up to 75 feet for faster setup in multiple zones
- Advanced Features for Enhanced Performance: Enjoy improved functionality with 4-zone capability, simultaneous delivery of domestic hot water and space heating on all Combi Units, and advanced controls featuring a quick setup screen and improved front panel display
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9.5
3Rinnai
Rinnai i150SN Condensing Gas Boiler, Whole Home Natural Gas Heater with Space-Saving Design and Smart Features, (150K BTU)
Why we love it
This boiler can heat your whole house and provide hot water for showers and faucets.
The digital display and easy parameter settings make it user friendly.
The compact, wall mounted design saves space.
Main highlights- Whole Home Heater: Heat the whole house with our tankless boilers, featuring a stainless-steel heat exchanger with a modulating wire mesh burner, and experience energy-efficient warmth and comfort
- Smart Features: This high-efficiency gas boiler's multizone control capability allows thermostat and integrated control pumps to connect directly to the boiler; Wall mount heater features safety child-lock that automatically turns off central heating
- Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your boiler; We do not recommend installing a heater without a technician
- Guaranteed to Last: 12-, 5-, and 1-year residential and 5-, 5-, and 1-year commercial standard warranty for heat exchanger, parts, and labor respectively
- Easy Interface: Our energy efficient heater has a digital display main screen, temperature and pressure display, and an outdoor reset sensor with easy parameter settings; Adjust CH temperature between 104°F and 180°F and DHW between 98°F and 140°F
Our ranking system
At bestchoice.com, our team curates a selection of top products from a vast array available online, using a sophisticated ranking system based on carefully defined criteria.While traditional hands-on testing has its merits, our use of AI technology offers distinct advantages. AI allows us to process and analyze vast amounts of data from multiple sources, providing a comprehensive view that goes beyond what manual testing can achieve. This approach enables us to deliver insights that are aligned with current trends and consumer preferences, ensuring our reviews are both relevant and up-to-date.
Features
Our AI-driven analysis examines key attributes, capabilities, and other critical factors tailored to each product category. This method allows us to assess effectiveness from various perspectives, ensuring a well-rounded evaluation.
Consumer Reviews
We aggregate and evaluate consumer feedback from across the internet, giving weight to ratings and reviews that reflect the most reliable insights. AI enhances this process by filtering and prioritizing data, offering a balanced view without the need for direct personal endorsements.
Popularity
Our system also considers the popularity of products, analyzing factors such as market presence, reputation, and user satisfaction. By leveraging AI, we capture a comprehensive picture of a product's standing in the market, which may not always be evident through traditional testing.
Value for money
AI allows us to compare products based on attributes like price, specifications, and user feedback, helping to determine their value for money. This data-driven approach offers an efficient and reliable way to assess how products stack up against one another in terms of cost-effectiveness.
