Ask a Tradesman
What is the best domestic over-door electric heater?
My first floor tenant feels the cold, so has her heating on full blast almost 24 hours a day. Also, she never opens any windows (fear of spiders coming in!). Her entrance door is at ground level and there is currently no heating in the entrance hall or up the stairs to the open plan landing of her flat (there's no door at the top of the stairs).
The huge difference in temperature between the entrance hall/stairs and the rest of the flat has caused a very bad condensation problem in the entrance hall/stairs, with condensation running down the walls and black mould around the door. I have called in a surveyor who was very thorough. He checked the roof, then took numerous readings with a damp meter and categorically said it was a lifestyle problem because the windows are never opened.
However, in an effort to do my bit as a landlord, I am having trickle vents retro fitted above the door and in all the windows, as she still refuses to open the windows. I am also considering having a heater installed in the hallway. Question: which type shall I go for? The hall itself is very narrow, so there's not really room for a wall hung panel heater. Would an over-door convector be suitable? (The surveyor said it would help.) If so, which do you recommend? The maximum width available in which to fit it is 800mm.
If you have a better solution, I'd be grateful, but I don't want a noisy blower-type heater.
Maybe worth considering a heat recovery system? no need for trickle vents at all, but more expensive than a plain curtain heater. See link below
If the situation is relatively undemanding however, an overdoor heater mounted above the door may be a practical solution. Small convector heaters can provide heating close to the point of heat loss, thereby eliminating cold spots. However, they generally have only limited effectiveness as thermal barriers (especially against wind) as they are unable to produce the aerodynamic flow across the full door width required of a 'true' air curtain. However they do have a number of benefits such as small size, low capital cost and ease of installation (being typically rated at 3kW they can be wired to a fused spur from a standard domestic ring main).
600mm models are avialble; see below
Answered 12th Nov 2012