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Residential Products
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HomeCommercial H2AC Innovation
air & water in harmony
The Rheem® H 2 AC® Rooftop Unit with eSync™ technology is the first integrated air and water system designed for restaurants and commercial spaces with high hot water needs. It improves efficiency and saves costs by preheating water using heat removed during the air conditioning process.
Energy Savings
The more hot water you use while the air conditioner is operating, the faster the payback—typically less than two years
Improved Efficiency
H 2 AC is more than twice as efficient as a standard AC unit because it uses heat captured from the air conditioning process
Innovative Technology
eSync Integration Technology automatically switches modes whenever there is an opportunity to pre-heat water
Remote Monitoring
Check from your office or home how one system, or multiple systems, are running and how it’s affecting your bottom line
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How It Works

Ground-temperature water enters the restaurant and is piped to the Rheem H 2 AC Rooftop Unit.

Hot air is pulled from the building’s interior to the Rheem H 2 AC Rooftop Unit where the rejected heat raises the water temperature to at least 125°F with eSync Integration Technology. Conditioned air is then supplied back to the building’s interior.

Pre-heated water is sent to the Rheem Storage Tank where this cycle is repeated to keep the water at 125°F.

Upon demand, pre-heated water from the storage tank travels to the Rheem Tankless Water Heaters, where it is quickly brought up to 185°F.

Note: The H 2 AC system works with a variety Rheem commercial tank and tankless water heating systems from standard to high efficiency.

Hot water up to 185°F is distributed throughout the restaurant as needed for cooking and sanitation.

The Right Fit for Your Business

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Sizing Your Integrated Air and Water System
If your business uses rooftop air conditioning units and more than 1,500 gallons of hot water per day, you’ll see significant savings with this system. The H2AC Rooftop Unit is sized according to standard load-calculation methods, while the water heater is specified like any standard tank or tankless selection procedure. Your Rheem representative will be happy to provide more information and recommend a solution tailored to your needs.
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Where to Place Your Integrated Air and Water System
In most cases, the optimal place for your H 2 AC Rooftop Unit is above an area that produces a lot of heat, typically the kitchen, dryer area, etc. It’s also best to position the H 2 AC Rooftop Unit, Storage Tank and Commercial Condensing Tankless Water Heaters in close proximity so you can get maximum efficiency from your Integrated Air and Water System.
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Product Details
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Give your hot water a head start
Ready to reduce your energy and water heating costs?