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Folks my seasonal problem has improved since I installed soffit vents to 2 sides of the property. However, twice in one week when HW goes off at set time on programmer the heating goes off too. When you try putting HW or CH back on nothing happens. If you leave it on, the pump eventually...

Try manomano

Is there Enough water in the system and all rads have water in them? Gravity fed systems can be a nightmare. 8mm pipework?

I got a bathroom fan which comes on with light. Could I installed a double switch, loop out from the live and the switch live from one gang to the second gang at the switch and both light and fan will independently? Or will I need to drop some more cable from the loft to the switch and...

No

Fans screwed into the shock absorber and ply sandwich but not the joists. The sandwich itself was screwed in the joist

No vibration. I have two of the same fans and both do same. The only problem is I can't move them further due to lack of room. One fan has at least 500mm ducting either side and other has 500 and 400 on the fan to vent Both fans have 12mm shock absorber pads on either side of 12mm ply and then...

Still same issue. Would it be quieter with flexible duct? From vent to fan it's solid duct and from fan to vent it's flexible.

I have just solid ducting from bathroom to fan and then fan to vent part flexi and some solid attachments

From the bathroom ducting

Is there anyway to reduce noise levels for inline fan with solid ducting? It is quite Loud on medium setting manrose mf100t

How are you doing those calculations? Is there a calculator?

Is the perm live from light?

Now the old doesn't work. The cable in sl is from light even swapped around it still works continuously

This one attached. Also tried with manrose mf100T same issue When i turn light switch on, nothing, but when i turn it back off again then it kicks in.

Swapping an old fan that had a transformer, removed transformer and there were SL N and L wires Put them into new fan and the fan just gets constant live and stays on even with light switched off. Tried it with 2 new fans and both fans same issue, different models. And yes, with the old fan it...

I seem to have lack of ventilation and excessive insulation. I have suffered from oxidised cables in the loft which have result in intermittent heating and hot water. I changed a fan in the loft yesterday and the unused earth cable wss and found to be oxidised!!

But won't the PIV push the same humid air into the landing?

Looking to fit a PIV but my loft has 75% humidity I got heating pipes and tanks up there which are lagged except the cold water header tank. I've installed some soffit vents and that hasn't decreased the RH. I do seem to have a lot of loft insulation, will removing some help? Will the PIV...

Would it just be worth getting insulated ducting? But would water not sit at the elbow?? This is the second vent.