DENVER: HEATING, AIR CONDITIONING, WATER HEATER & GAS FIREPLACE SERVICES

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Eternal Hybrid Tankless Water Heater GU195


One Simple Solution for Many Applications.

Whether it’s commercial or residential domestic hot water, the Eternal is the right solution. Its triple pass design provides endless hot water with up to 98% efficiency, and a 15 year residential / 5 year commercial no leak warranty.

Rock Heating Eternal Tankless Water Heater

Save Time & Water

Eternal is compatible with most recirculation systems, whether it’s a dedicated return line or under-the sink retrofit pump. The built-in reserve tank within the heat exchanger makes instant hot water possible.

Eternal Tankless Water Heater Low Nox HybridEternal Tankless Water Heater Energy Star
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Stainless Steel Heat Exchanger w/built in 2 gallon reserve tank

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Full flow design and dual activation (thermostat and flow) are compatible with water sense fixtures

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Flexible NG / LP / Indoor / Outdoor / Direct Vent / Power Vent conversions in one unit

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2” PVC up to 35ft or 3” PVC venting up to 100ft


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Clip-on components easily serviced by Rock Heating & Air Conditioning

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Patented self-cleaning utilizes turbulent flow to flush sediments out

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Digital display screen for adjusting temperature and easy diagnostics

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Long-lasting design and reduced risk of flooding


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Available in Natural Gas or Propane


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Flexible indoor installation options


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Meets California and Texas NOx Emission Rules


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Pair up with an air handler for efficient home heating