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.
The Alde Heating System 3010 Compact high efficiency combi boiler is ideal for central heating systems in boats, motor homes, caravans and portable cabins. It provides 8.7 kW of heat through up to 14 m of aluminium convector with 93% efficiency. The boiler gives you central heating that is: 1  Clean.