Makes a complete mockery of the u value! Specially constructed multiple chamber frames completely ruined.
My plans for new DG now suspended till this stupidity is stopped.
Why would you sacrifice your health?
And do a bit of science on heat loss. When we respire, boil a kettle, run a bath or shower use a gas appliance we produce water vapour, that vapour has a heat capacity, ie it carries energy with it, it took energy to make it and that energy stays with it until it is forced to give up that energy by condensation. Condensation occurs when water vapour hits a cold spot, with double glazing its the corners or the bottom of the window edge...at that point when condensation occurs water vapour gives up its energy and energy always flows from hot to cold, meaning that the heat in the water vapor goes to the coldest point, the outside air. By not ventilating the water vapour you have essentially turned all you windows into fridges...the colder it gets outside the more rapid the cooling effect.
Thats why trickle vents are heat loss neutral, they may let some cold fresh air in water vapour out but the prevent the fridge effect. They do not ruin frames, they lessen the chance of you having a serious lung condition and they also stop point cooling.