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The Hot Water Haven

Go Green Go Tankless 404-839-8400

Web Store

Web Store

Interior Natural Gas 45-H NG 6.8 GPM

$650.00 $725.00

Product Description Great for larger homes 3 to 4 baths

The 45-H is the outdoor equivalent to the 45-HI indoor tankless water heater, and is designed to supply hot water to a standard three bedroom, two bathroom home. The 45H-NG tankless water heater is for Natural Gas outdoor installations only. For the Liquid Propane model, please visit the 45H-LP. Rated at an already impressive 6.8 GPM, the 45-H is also split system adaptable, which can further increase efficiency and hot water delivery speed. With it's fully automated control system, the 45-H is the ideal choice for any standard sized home.

Ask about our bundle kits, you will recieve the unit and all venting need to install your unit add and additional $189 to retail price




45H Manual (English)


45H Manual (French)




Up to 140,000 BTU, 110V power supply


Inlet Measurements:


3/4 inch water inlet & outlet, 3/4 inch gas inlet


Flow Rate:


35 degree rise: 6.8 GPM

50 degree rise: 5.0 GMP

70 degree rise: 3.4 GMP

Additional Features


CSA certified for US and Canadian use

Natural Gas Powered

Digital remote with simple controls and diagnostics

110 volt UL listed power cord

140,000 BTU

Energy Factor: 0.80

10 year warranty on heat exchanger

5 year warranty on parts

Energy rating: 82%

Hot water capacity range: 1.2 - 6.8 GPM

Maximum / Minimum gas rate: 19,800 - 140,000 BTUs


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