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The German Passivhaus standard just begs for factory prefab construction. I suspect a major factor is how one can reduce the cost of making the structure airtig
by stcredzero 10y ago
The German Passivhaus standard just begs for factory prefab construction. I suspect a major factor is how one can reduce the cost of making the structure airtight.
- avar 10y agoDon't fully airtight structures need a lot of redundant safety systems to protect against just leaving a candle on killing everyone from carbon dioxide poisoning?
- Stefstefstef 10y agoAirtight homes doesnt mean no ventilation but no cracks in walls and doors and window framing
- maxerickson 10y agoIn the context of avar's question the active ventilation is a safety system. A little bit of research indicates that candles are not all that different in oxygen consumption and CO2 production than a human and that a single candle (or person) wouldn't use up the oxygen quickly if the ventilation ceased. As long as a failure of the ventilation system is obvious (so a window can be opened or whatever), it doesn't seem like it would be a major concern.
- jasonwatkinspdx 10y agoWell, a candle isn't enough to be a concern. But state of the art air tight passive houses include ventilator units that exchange air while retaining (or rejecting) as much heat as possible.
- elrondburrell 10y agoThere are several companies in the US producing prefab Passivhaus homes. Typically, a building membrane is used as the airtight layer. Joints get taped, both in the factory and on site. E.g. http://www.phoenixhaus.com http://www.phoenixhaus.com E.g. https://www.ecocor.us/prefab https://www.ecocor.us/prefab