The heat recovery ventilation system has been running for some three months now. The system is a Paul Novus 300 unit, which has a heat recovery efficiency of up to 94%. The system commissioning included balancing the supply and extract air flows and setting the fan speeds for each setting. This all went well and the system balanced well (which isn’t always the case). The photo above left shows the ventilation unit set within a cupboard within my new office. With all the attenuators on the ductwork (see earlier post), and the sound insulation around the cupboard, the system is almost silent: audible only in boost mode.

The photo above right shows the commissioning taking place. The total air flow was measured and adjusted through the intake and exhaust terminals (outside) to ensure total design air flow was achieved. The internal terminals within each rooms are then measured, adjusted and-re-measured to ensure each room receives the right air flow.

More performance data will follow on future blog postings. Keep checking back.