I installed a 'Multivent' unit in the (well insulated so cold) attic and attached 100mm flexible uninsulated ducting to it from 4 rooms via ceiling vents. It's basically a box with a big fan and several inlets which vents out near the soffit (actually it re-enters flat and out through the wall) via a single 100mm uninsulated duct. The flat I live in gets pretty humid with washing hanging, cooking etc.
Not being very savvy in these matters I was happy till I realised how much condensation was collecting in the pipes, some of them fit to burst. After emptying them 2 winters running I need some advice.
The Multivent is only about a foot above the ceiling so long gently angled ducting, level runs are used. I don't know where to put any condensation traps if used and if fitted how can I ensure condensate will run well downhill at such a gentle angle? Also won't these spoil my suction?
Do I have to go over to solid ducting and should it be insulated or does a condensation trap work better without insulation?
One final thing- will I need a trap etc on the outflow side as well? It's all starting to sound like a job for a professional.
Thanks in advance.
Not being very savvy in these matters I was happy till I realised how much condensation was collecting in the pipes, some of them fit to burst. After emptying them 2 winters running I need some advice.
The Multivent is only about a foot above the ceiling so long gently angled ducting, level runs are used. I don't know where to put any condensation traps if used and if fitted how can I ensure condensate will run well downhill at such a gentle angle? Also won't these spoil my suction?
Do I have to go over to solid ducting and should it be insulated or does a condensation trap work better without insulation?
One final thing- will I need a trap etc on the outflow side as well? It's all starting to sound like a job for a professional.
Thanks in advance.
