Germany’s Vaillant has developed an air-source heat pump that uses propane (R290) as the refrigerant. It can produce between 3.5 kW and 12 kW of heat, and domestic hot water to a temperature of up to ...
LATHAM, N.Y., April 30, 2003 — Plug Power Inc. and partner Vaillant GmbH have installed 13 proton exchange membrane fuel cell heating appliances during the past three months in multi-family homes and ...
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