I would have thought good ventilation would bring much colder air in from the outside thereby mitigating the benefits of good insulation. How do modern houses deal with this issue or is good ventilation much less important and I expect? (I’m in the UK so we don’t have blown air heating/cooling as standard here)
In: Engineering
Both play together. A simple example:
1. Bad Insulation and Bad Ventilation: Warm air that is inside heats up the insides, but that heat quickly escapes through the walls. The walls are cool and draw heat out of the room, on top of that, cold air keeps coming in, cooling everything even more.
2. Bad Insu, Good Venti: Warm Air (mostly) stays where it is supposed to be, and doesn’t flow out of the house, but the walls still drain heat from the rooms.
3. Good Insu, Bad Venti: The walls are not draining the heat out of the rooms, but any warm air is quickly pushed out by cold air. The insides may be reasonably warm, but there is still a cold draft of air going on and the room itself cannot maintain temperature without a heatsource.
4. Both good: Air only comes and goes where you want it to. You can fully control what goes where, and no heat is leaking out through the walls etc. It will always be as warm or as cold as you want it to.
Ventilation and Insulation are just tools to use to manage your houses temperature. Both together ensure that cold air only goes where you want it to (good ventilation) and any heat that you produce in a room will stay in that room (good insulation)
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