Domestic gas-fired forced convection air heaters for space heating, with fan-assisted burners not exceeding a net heat input of 70 kW. The general technical requirements and test methods
Rectangular all-cast moulding boxes of aluminium and magnesium alloys having inside dimensions: length from 400 to 500 mm, width from 300 to 400 mm, height from 100 to 200 mm. Construction