Turns out, ducts buried under insulation actually can work to save energy and eliminate condensation inside the ducts. If you seal and insulate them first

Two fans talk to each other to replace stale air with fresh air

Houses cannot expand and contract with changes in pressure like balloons can. Instead, they need paths for air to balance the pressure

Condensation is when moisture in the air hits a cool enough surface to convert the vapor into water.

As houses are built tighter, they exchange less air between inside and outside. This saves energy, but the inside air can get stale if you don't have a fan and a plan

Stack effect is relentless: it is always working, when you’re awake or asleep, even during blackouts. And it feeds on itself.

Built tight and verify. And then ventilate.

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A super efficient heat pump with a GWP of 1