The USB-4232 is bi-directional which means it will not only convert from USB to 4 port RS232 but 4 port RS232 to USB. These USB to 4 Port RS232 converters feature (4) 9-pin DB9s for simple cable installation. Our converters are protected by a 5 year warranty and 30 day money back guarantee.
While variable speed air source heat pumps can be competitive with geothermal heat pumps in retrofit situations and smaller, better insulated buildings and less extreme climates, GHPs remain the most efficient way to heat and cool a building.
Heat Pump (Only) Mode. This is the most efficient mode providing you with the greatest amount of savings. In this mode, the water heater only operates the heat pump to heat the water. This is the most efficient mode providing you with the greatest amount of savings.