The GEYSER is a reliable heat pump water heater that will save you money and energy for years to come. The GEYSER is suitable for most storage tank water heaters from 40 gallons to 120 gallons (GEYSER R for electric tanks – GEYSER RO is for any tank). It saves 50%-65% on the costs of running an electric water heater. Why get a GEYSER add-on instead of a Hybrid? 1. It is much cheaper to buy an add-on Geyser obtaining the same savings, than it is to throw away your tank and buy an expensive hybrid unit 2. If the tank of a hybrid unit starts leaking, you have to replace both the heat pump and the tank. If the tank of the Geyser add-on fails, you just replace the tank. 3. Any Heat Pump is slower. If a customer is “just getting by” with a traditional 50 gallon tank, they will experience cold showers with a 50 gallon hybrid. Larger hybrids are even more expensive. Instead get an 80 gallon storage tank and add a Geyser! The GEYSER is designed for a minimum ambient temperature of 45ºF (indoor units in most climates). Build to provide years of reliable hot water heating. Made by Nyle Systems in ME, USA means quality and reliability. The unit comes with a 6-year limited warranty. Maintenance is as simple as periodically cleaning the air filter.