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.
Amana's best furnace is the ACVM97, a modulating two-stage furnace that runs at up to 97 percent AFUE. Other choices for home heating include the AMEC96, another reliable two-stage gas furnace, and the AMS8, a single-stage model of 80 percent AFUE that is good for small homes or offices.