| 摘要 |
A ventilating system which uses the heat obtained from combustion flue gases from a fuel-fired heating appliance (10), and spent air exhausted from the premises, to warm incoming fresh air via a heat exchanger (20). Spent air may be collected via a cooker hood (26) or a bathroom or shower room extractor (28). As shown, heating appliance (10) heats the air which exits via a warm air supply duct (18). Alternatively the appliance (10) may be a central heating boiler; or the appliance (10) may heat water which is circulated by a pump through a heat store. <IMAGE> |
