I’d guess wall vents are required if you are availing of the grant; if you were paying cash I’m sure you’d find someone to pump walls without making the holesThanks Mick. Apparently the walls cant be pumped without the vents?
Need a good level of air tightness for it to work properly; might be hard to achieve in an old house, I’d get an airtight test done before spending money on a ducted ventilation system; plus fitting in an refurb can be very difficult (costly and disruptive)Trickle window / 'hole in wall' vents and intermittent extraction in kitchen and bathrooms are, in my opinion and experience, generally not suitable in our climate for various reasons notwithstanding the fact that it is still to be found in the building regs and would be allowed as the basic level of ventilation in homes.
My advice would be to look at least at the next level up such as something like a whole house mechanical system such as cMEV (centralised mechanical extract ventilation).
Not totally correct I believe. The requirement I understand is appropriate ventilation. 'Hole in wall' vents are the most basic method of ventilation but there are much better ways of ventilating.Thanks Mick. Apparently the walls cant be pumped without the vents?
For cMEV, good airtightness, while a nice to have, isn't essential for effective / efficient ventilation and can be quite easily retrofitted in most houses.Need a good level of air tightness for it to work properly; might be hard to achieve in an old house, I’d get an airtight test done before spending money on a ducted ventilation system; plus fitting in an refurb can be very difficult (costly and disruptive)
One of the reasons I discovered previous residents in my house had blocked off all the vents on one side was because when I heated the rooms, there was no air circulation and the room wasn't heating up. If you don't have ventilation in the room whatever heating you have won't circulate around the room. Once I cleared all the debris, newspaper, polystyrene etc out of the vents even modest heating actually spread around the rooms in question. You'll also have issues with damp if there is no ventilation, if there isn't already.Thank you, sorry about the lack of information.
My basic first thing to solve was what are the basic necessary requirements to be fulfilled. I've had a look at the regs, different parts, years, it is hard to see what is required now at minimum in a non new build. I guess I am asking if window vents suffice and I don't have to knock holes in walls?
We are tackling the cold issue by insulating floors, walls, changing windows, all the basics. The wall pump people said we would have to have wall vents in two rooms before the pump. After making the house warmer, if possible I don't want to then add wall vents. So, if I can vent into a well insulated chimney with some air flow and window vents, or just have window vents in both rooms it would be great.
You should still get heat distribution in a closed room. Radiators are designed to warm the air in contact with them, this rises upwards above the cooler air pulling in cold air from below creating a circulation within the room. Halting that heat circulation would require a vacuum.If you don't have ventilation in the room whatever heating you have won't circulate around the room.
I have two awkward rooms in an old house which have no vents. Can anyone assist with whether my suggestions will suffice?
Room 1: very little external wall space, but has a chimney we will be closing up. Can we put a vent in the plaster/ insulation in the flue and use this as a nice hidden vent with no gusty wind?
Room 2: has plenty of external wall, but will window vents suffice as the house is cold?
Thank you
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