Size name:4 | Colour Name:High Performance (90%) Unit Specification Model: DHV-25N Unit size (mm): 1075 x 784 x 270 Weight (Kgs): 33 Airflow(high/med/low): 250/220/160M3/h Noise Level: 35dBA Controller: 3 speed (comes supplied) 2 Room kit: 2 x Inlets/outlets 2 x Wall Grilles 20m Insulated Ducting 8 x Ties 3 Room kit: 3 x Inlets/outlets 2 x Wall Grilles 30m Insulated Ducting 12 x Ties 4 Room kit: 4 x Inlets/outlets 2 x Wall Grilles 40m Insulated Ducting 16 x Ties 5 Room kit: 5 x Inlets/outlets 2 x Wall Grilles 50m Insulated Ducting 20 x Ties The working principle of a heat recovery ventilation unit is to exchange energy in the air in a two-way exchange system by using heat differences of the inside and outside temperatures. It has several functions; as well as heat recovery it functions as a heat-conductor and a moisture extractor. The output of the extractor unit utilises energy from the intake air via an effective heat exchanger to contribute to reducing the buildings energy requirement. Energy-saving rates of up to 75% can be achieved with a Boulder Developments heat recovery system. This product is CE certified.
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