The Electroheat ECO-V inverter top vent range of pool heat pumps allow the pool owner to heat their pool in cooler climates even when the ambient air temperature is close to 0°C. The ECO-V range are ideal solution to heat swimming pools, plunge pools, swim spas and spas to extend the swim season or for year-round enjoyment. They are available in 12 (heating only), 17, 21, 25, 32 in single phase models and, 35 & 45kW in three phase models rated @ 15C air heating and cooling models. Key features of the Electroheat ECO-V 12, 17, 21, 25, 32, 35 & 45KW Inverter pool heat pumps: Inverter technology improves energy efficiency Top venting design allows for greater installation options Digital controller with diagnostics Heating and cooling operating modes to select from Supplied drainage spigots allow piping to drain away the condensate Refrigerant pressure gauge indicates the level of refrigerant charge held within the unit Hydrophilic blue fin coated evaporator protects unit from erosion in humid and coastal environments Automatic hot gas evaporator de-icing removes ice build up R32 refrigerant for zero ozone depletion (17-45kW models) R410A refrigerant (12kW model)