The manual for our gas heater recommends a flue height of 3m "for best venting performance". We have installed it downstairs in our two-storey house, and the final flue height is about 5m. Clearly it vents well, but I've started to wonder if it's possible to vent too well, i.e. to send too much heat up the flue. This thought occurred to me because the heater (rated at 7.8 kW) doesn't put out as much heat as I had expected.
- posted
12 years ago