3 ms·
Because fresh air needs to be heated or cooled, and that's expensive when you're running everything off diesel. Heat exchangers do help, but they're not perfect
by petertodd 7y ago
Because fresh air needs to be heated or cooled, and that's expensive when you're running everything off diesel. Heat exchangers do help, but they're not perfect, so every bit of outside ventilation costs money.
This is why fume hoods which exhaust to the outside can be surprisingly expensive to run in cold/hot climates.