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.
Economical. The stylish wall-mounted Envi panel heater is the most innovative and energy efficient heater available. The Envi is the world's first heater to use âstack convection technologyâ to evenly distribute the perfect amount of heat throughout a room while reducing your heating bills by up to 50 percent.Safe.he Envi is the world's first heater to use âstack convection technologyâ to evenly distribute the perfect amount of heat throughout a room while reducing your heating bills by up to 50 percent.