Boiler Types: Standard vs. High Efficiency

Best High Efficiency Natural Gas Boiler on April 2024 Shopping Deals at Bestonio.com

  • Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas

    • UPC: 727904482106
    • ASIN: B00CI4YS3G
    • Brand: Noritz
    • Manufacturer: Noritz

    The NORITZ NRC66DV is a fully condensing tankless water heater with an advanced heat exchanger design and built-in controller. With flow rates up to 6.5 gallons per minute the NRC66DV delivers the highest flow rates in its category and can be vented using 3" Schedule 40/80 PVC, PP or CPVC.  Various adapters and terminations are available to allow ... [Read More]

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

    • UPC: 671657140946
    • ASIN: B00DDPZ5HM
    • Brand: TAKAGI
    • Size: Medium
    • Manufacturer: Takagi

    With gas inputs of 199,000 BTU, the T-H3 can produce enough hot water for four bathrooms in warmer climates or three baths in colder climates.

  • Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Twin Pipe

    • UPC: 766156008160
    • ASIN: B00OBVKBB2
    • Brand: Rinnai
    • Size: Twin Pipe/Ultra
    • Manufacturer: Rinnai

    Rinnai takes tankless water heating one step further with condensing technology that delivers more efficiency than ever before. Enjoy all the same tankless benefits you’ve come to expect from Rinnai, plus even greater energy savings. Features: 95% Thermal Efficiency Natural gas or propane Indoor Installation Only 98° F to 140° F Residential Tem... [Read More]

  • Rinnai V65eN Tankless Hot Water Heater, Large, V65eN-Natural Gas/6.5 GPM

    • UPC: 766156007118
    • ASIN: B0084CPEDE
    • Brand: Rinnai
    • Size: Large
    • Manufacturer: Rinnai

    Rinnai's V65E exterior-mount tankless water heater efficiently delivers up to 6.6-Gallon per minute (GPM) of hot water, making it perfect for your one to two and half bathroom home. This easy-to-install, ultra-compact unit lets you enjoy all the benefits of Rinnai tankless water heating. You'll experience clean, reliable hot water at a consistent p... [Read More]

  • Noritz CB199-DV-NG Combi Boiler

    • UPC: 817000013165
    • ASIN: B019MODLTG
    • Brand: Noritz
    • Manufacturer: The Distribution Point FC

    Noritz introduces the cb series of combination-boilers: the newest line of condensing combination boilers capable of delivering whole home hydronic heat and industry leading volume of domestic hot water (dhw) for large homes, including those in colder climates. The new cb series combi-boilers are designed for quick and easy installation and also in... [Read More]

  • Takagi T-H3J-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 6.6-Gallon Per Minute

    • UPC: 671657141929
    • ASIN: B00DDPZ4AK
    • Brand: TAKAGI
    • Size: Medium
    • Manufacturer: Takagi

    With gas inputs of 160,000 BTU, the T-H3J can produce enough hot water for two bathrooms in warmer climates or 1.5 baths in colder climates.

  • Rinnai V65IN 6.6 GPM Indoor Low NOx Tankless Natural Gas Water Heater

    • UPC: 766156007095
    • ASIN: B0084CPEDO
    • Brand: Rinnai
    • Size: Large
    • Manufacturer: Rinnai

    Features ENERGY STAR Qualified Energy Factor of .82 for Natural Gas and Propane Certified for Installation in Manufactured (Mobile) Homes Leak detection shuts off water to unit to limit property damage Enhanced scale detection lessens possibility of serious, long-term damage to unit Temperature lock prevents accidental or unauthorized changes to wa... [Read More]

  • Weil-McLain 383-500-700 Ultra 80 High Efficiency Natural Gas Boiler, 95.2% AFUE

    • ASIN: B0062OYQ6C
    • Brand: Weil-McLain
    • Manufacturer: Weil-McLain

    Weil-McLain 383-500-700 Ultra 80 High Efficiency, Condensing, Natural Gas Boiler with Taco 007 Circulator Pump (95.2% Efficiency). BTU Input: 80,000; BTU Output: 62,000. Vent Size: 3"; Water Connection: 1"; Gas Connection: 1/2". Warranty: Limited 15 Year Warranty on Heat Exchanger; 1-Year on Parts.

  • Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater

    • UPC: 020352609935
    • ASIN: B0084CPDFS
    • Brand: Rheem
    • Manufacturer: Rheem

    All Rheem heating, cooling and water heater heating products meet and exceed rigorous industry standards for quality and reliability. From raw material delivery to finished product assembly, each phase in the manufacturing process is effectively overseen to ensure the highest quality in water heater manufacturing. Rheem products are frequently test... [Read More]

  • Noritz CB180-DV-LP CB180DVLP Indoor Direct Combination Boiler (Standard Vent Convertible) with Built-in Pump, max. 180,000 BtuH DHW, 10.1 Gym, 100,000 But Space Heating-LP, White

    • UPC: 817000013141
    • ASIN: B019MODLUK
    • Brand: Noritz
    • Manufacturer: The Distribution Point FC

    Noritz introduces the cb series of combination-boilers: the newest line of condensing combination boilers capable of delivering whole home hydronic heat and industry leading volume of domestic hot water (dhw) for large homes, including those in colder climates. The new cb series combi-boilers are designed for quick and easy installation and also in... [Read More]

  • Marey Power Gas 10L 3.1GPM Natural Gas Tankless Water Heater

    • UPC: 764177000040
    • ASIN: B00884UV5E
    • Brand: MAREY
    • Size: Small
    • Manufacturer: Marey

    MAREY GA10NG Indoor Natural Gas Tankless Water Heater can provide up to 4.3 Gal. per minute for a perfect shower at 115°F output water temperature. It is also called water heater on demand, because it heats water only when needed, saving energy. It is designed in the USA and it's perfect to supply endless hot water for up to 2 or 3 points of use s... [Read More]

  • Rheem RTG-84XLN-1 Tankless Water Heater, Grey

    • UPC: 020352671048
    • ASIN: B077MXHW4H
    • Brand: Rheem
    • Manufacturer: Rheem

    Rheem RTG is a series of mid-efficiency condensing tankless gas water heaters designed for continuous hot water. Industry leading low flow activation with a minimum flow rate of .26GPM and minimum activation flow rate of .40GPM ensures hot water is received even in low demand situations. Ultra Low NOx burner meets SCAQMD rule requirements of safety... [Read More]

  • EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology

    • UPC: 762148098454
    • ASIN: B002635ODW
    • Brand: Ecosmart
    • Size: 17 x 17 x 3.5
    • Manufacturer: Ecosmart

    Configured for cold climates or high flow rates. Well suited where incoming water temperature can drop below 45 F. For use in more demanding water usage applications. Self modulating flow sensor technology regulates the amount of energy required to heat the water needed. Digital temperature display showing the outlet water temperature setting. Uses... [Read More]

  • Rheem RTGH-84DVLN Indoor Direct Vent Natural Gas Condensing Tankless Water Heater Low Nox

    • UPC: 020352609959
    • ASIN: B008E6LIQ2
    • Brand: Rheem
    • Manufacturer: Rheem

    Next Generation Burner Technology Industry Best! .26 GPM Minimum Flow Rate, .40 GPM Minimum Activation Flow Rate UMC-117 remote control and 10 ft. of thermostat wire is included EZ-Lint cable available for high demand applications to connect two thankless units to operate as one Manifold up to 6 units with an optional MIC-6 manifold control board E... [Read More]

  • Eccotemp i12-NG Tankless Water Heater

    • UPC: 891876002621
    • ASIN: B0157EJTQY
    • Brand: Eccotemp
    • Size: 16 x 16 x 11 inches
    • Manufacturer: Standard Plumbing Supply

    The Eccotemp i12-NG has a new revolutionary design, making it unlike any other tankless water heater on the market today. This model features a sleek black glass casing, fully automatic temperature controls for precision, touch screen, and LCD temperature display which shows output temperature as well as GPM flow. Rated at an impressive 3 GPM, the ... [Read More]

  • LOCHINVAR PBN0502 500,000 BTU"POWER-FIN" HIGH EFFICIENCY COMMERCIAL NATURAL GAS BOILER/W SMART TOUCH, 85% 120/60/1

    • UPC: 099461149878
    • ASIN: B07S9F8FD9
    • Brand: POWER-FIN
    • Manufacturer: UNKNOWN

    500,000 BTU "POWER-FIN" HIGH EFFICIENCY COMMERCIAL NATURAL GAS BOILER/W SMART TOUCH, VOLTS:120, HERTZ:60, PHASE:1, EFFICIENCY:85%, FLUE SIZE:7", MAX WORKING PRESSURE:160 PSI, MAX WATER TEMPERATURE:240 F , IGNITION:HSI, GAS CONNECTION:1", RETURN/SUPPLY WATER CONNECTION:2-1/2", INPUT/OUTPUT BTU'S:500,000/425,000, INLET GAS PRESSURE MIN/MAX:4.2" w.c./... [Read More]

  • TC-Home Natural Gas Instant Tankless Hot Water Heater Boiler House Bath (Natural Gas-12L)

    • UPC: 608631817211
    • ASIN: B07F75YL3W
    • Brand: TC-Home
    • Manufacturer: TC-Home

    Description: 1. High efficient energy saving : the heater exchanger and main burner adopt mostly advanced energy-saving and combustion technology to decrease gas consumption and burning noise. 2. Low water-pressured startup : the water control linkage valve makes the heater start up under low water pressure and shortage areas and those living in hi... [Read More]

  • Noritz NRCB199DV-NG Indoor Direct Combination Boiler (Standard Vent Convertible) with Built-in Pump, max 199,900 DHW, 11.1 Gpm, 120,000 Btuh Space Heating-Natural Gas

    • UPC: 817000013677
    • ASIN: B075TNGHNN
    • Brand: Noritz
    • Manufacturer: Noritz

    Noritz is proud to release the most innovative combi boiler in the industry, with out #1 focus on ease and comfort.

  • TC-Home 12L Natural Gas Tankless Hot Water Heater 3.2GPM Instant Bolier Stainless Steel

    • UPC: 709445508538
    • ASIN: B01MXDC3EV
    • Brand: TC-Home
    • Size: 12L
    • Manufacturer: TC-Home

    Copper water tank High-quality stringy stainless steel panel Applicable water pressure :Zero pressure starting Cold water pipeline: Short pipeline equipped with NPT 1/2 steel tube Warm water pipeline: Long pipeline equipped with NPT 1/2 steel tube Gas pipe: G 1/2" Vent Type:4.2" Flue Duct Water & gas combination unit ,Fitted with over heating and p... [Read More]

  • Slantfin Natural Gas Boiler with 150,000 BTU Input 110,000 Output BTU Intermittent Electronic Ignition

    • UPC: 042541069467
    • ASIN: B00KZPADIY
    • Brand: Sentry Industries Inc.
    • Manufacturer: Slant/Fin

  • Boiler Types: Standard vs. High Efficiency

    Why Your New "High Efficiency" Hot Water Boiler Isn't Saving Money On Fuel Costs

    Top 10 Best Boilers of 2018 Reviews.