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Top 10 40 Gallon Hot Water Heater Natural Gas – Water Heaters

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1. A. O. Smith

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A.O. Smith GCR-40 ProMax Plus High Efficiency Gas Water Heater, 40 gal

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A. O. Smith #ad - Meets all current regulations set forth by the National Appliance Energy Conservation Act NAECA. Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response.

Blue diamond glass coating provides superior corrosion resistance to industry-standard glass lining. Dynaclean diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting PEX cross-linked polymer. Self-powered electronic gas valve uses thermopile to generate power needed to operate the electronic gas control without requiring external power.
BrandA. O. Smith #ad
ManufacturerTrumbull Industries #ad
Height58.5 Inches
Length22 Inches
Width22 Inches
Part NumberSMIGCR40
ModelGCR-40
Warranty6-year limited tank and parts warranty

2. Rinnai

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Natural Gas: Indoor Installation, Rinnai V65iN High Efficiency Tankless Hot Water Heater, 6.5 GPM

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Rinnai #ad - Up to 6. 5 gpm hot water flow rate varies by groundwater temp. Residential factory warranty - 120 months heat exchanger, 12 months labor, 60 months parts. Control-r 2. 0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode. Endless hot water for your entire home. V65in he high efficiency tankless Hot Water Heater - Natural Gas: Indoor Installation Only.
BrandRinnai #ad
ManufacturerRinnai #ad
Height26.9 Inches
Length14.04 Inches
Weight45.6 Pounds
Width9.27 Inches
Part NumberV65IN
ModelV65IN
WarrantyResidential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

3. GASFLEX

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Excel Pro Tankless Gas Water Heater NATURAL GAS 6.6 GPM Whole House and for Hydronic heating Compare to Rinnai, Bosch FREE FLUE KIT, Rheem,Noritz

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GASFLEX #ad - Certified for installation in Manufactured Mobile Homes Pure Copper Heat Exchanger. Power vented directly vertically rooftop or sideways wall via Stainless Steel CAT III Flue 3. 5" diameter Included 20". Modulates heat output in response to the flow rate of water running through the unit. Delivers 6. 6 gpm of hot water with a 35°F Instant Temperature Rise Equivalent to 5. 5gpm with a 45F temp Rise. Natural gas - european Model - Digital Display is in Celsius.
BrandGASFLEX #ad
ManufacturerEXCEL #ad
Height23 Inches
Length14.5 Inches
Width5.5 Inches
Part Number0707239100098
ModelJSD10D 10D

4. Ecosmart

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EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

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Ecosmart #ad - Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater. Never run out of hot water with an ECOSMART tankless water heater. Ecosmart tankless water heaters are 99. 8-percent energy efficient. Uniform Energy Factor:098. Patented self Modulating Technology and design. Lifetime warranty.
BrandEcosmart #ad
ManufacturerEcosmart #ad
Height11.5 Inches
Length3.75 Inches
Weight6.5 Pounds
Width8 Inches
Part NumberECO 11
ModelECO 11
WarrantyLifetime warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.

5. A. O. Smith

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40 gal, A.O. Smith ENS-40 ProMax Short Electric Water Heater

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A. O. Smith #ad - Durable, tamper-resistant brass drain valve. Meets all current regulations set forth by the National Appliance Energy Conservation Act NAECA. Dynaclean diffuser dip tube helps reduce lime and sediment buildup while maximizing hot water output; made from long-lasting PEX cross-linked polymer. Permaglas glass coating protects steel tank from corrosion and maximizes tank life. Coregard anode rode aluminum anode with stainless steel core protects tank against corrosion longer than ordinary steel anodes.
BrandA. O. Smith #ad
ManufacturerTrumbull Industries #ad
Height50 Inches
Length22 Inches
Width22 Inches
Part Number6 40 EORS
ModelENS-40
Warranty6-year limited tank and parts warranty

6. Eccotemp

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Eccotemp i12-NG Tankless Water Heater

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Eccotemp #ad - Whole home indoor, rated at 3 gpm that activates only on demand and no pilot light needed, gas powered tankless water heater, reducing energy consumption.

Uses standard 1/2" npt water fittings and comes with horizontal venting allowing for a convenient and quick installation. Features fully automatic temperature controls with an energy saving mode and child lock technology. Safe electronic ignition system; plugs into standard 110v electrical outlet with UL-listed cord. Sleek, modern design with black tempered glass front panel featuring an easy to use LED display controls. Elevation not recommended to be used any higher. Field tested to 5500 ft.
BrandEccotemp #ad
ManufacturerStandard Plumbing Supply #ad
Height11 Inches
Length17 Inches
Weight30 Pounds
Width29 Inches
Part Number9802296
Modeli12 - NG
Warranty2 Year Limited Manufacturer Warranty

7. A. O. Smith

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40 gal, A.O. Smith GCR-40LP ProMax Plus High Efficiency Liquid Petroleum Gas Water Heater

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A. O. Smith #ad - Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response.

Blue diamond glass coating provides superior corrosion resistance to industry-standard glass lining. Self-powered electronic gas valve uses thermopile to generate power needed to operate the electronic gas control without requiring external power. Meets all current regulations set forth by the National Appliance Energy Conservation Act NAECA. Dynaclean diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting PEX cross-linked polymer.
BrandA. O. Smith #ad
ManufacturerTrumbull Industries #ad
Height58.5 Inches
Length22 Inches
Width22 Inches
ModelGCR-40LP
Warranty6-year limited tank and parts warranty

8. A. O. Smith

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50 gal, A.O. Smith GCG-50 ProMax Tall Gas Water Heater

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A. O. Smith #ad - Meets all current regulations set forth by the National Appliance Energy Conservation Act NAECA. Dynaclean diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting PEX cross-linked polymer.

Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response. Blue diamond glass coating provides superior corrosion resistance to industry-standard glass lining. Self-powered electronic gas valve uses thermopile to generate power needed to operate the electronic gas control without requiring external power.
BrandA. O. Smith #ad
ManufacturerTrumbull Industries #ad
Height60.75 Inches
Length21 Inches
Width21 Inches
Part NumberGCG-50
ModelGCG-50
Warranty6-year limited tank and parts warranty

9. Bradford White

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Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

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Bradford White #ad - Advanced screenLok Technology Flame Arrestor Design. Factory-installed Hydrojet Total Performance System. Maintenance-Fre. Resettable Thermal Switch. Bradford white ICON System.
BrandBradford White #ad
ManufacturerBradford White #ad
Height60.5 Inches
Length20 Inches
Weight134 Pounds
Width20 Inches
Part NumberRG40T6N
ModelRG40T6N

10. A. O. Smith

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50 gal, A.O. Smith XCR-50 ProMax Plus High Efficiency Gas Water Heater

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A. O. Smith #ad - Self-powered electronic gas valve uses thermopile to generate power needed to operate the electronic gas control without requiring external power.

Meets all current regulations set forth by the National Appliance Energy Conservation Act NAECA. Dynaclean diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting PEX cross-linked polymer. Blue diamond glass coating provides superior corrosion resistance to industry-standard glass lining. Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response.
BrandA. O. Smith #ad
ManufacturerTrumbull Industries #ad
Height57.25 Inches
Length22 Inches
Width22 Inches
ModelXCR-50
Warranty10-year limited tank warranty and 6-year limited parts warranty