The problem with a pump is when the power goes out, there's no way to drain the crawl space. Garages are required to have certain amount of ventilation as well.
In both cases, the vent can't be the type that can be closed off, such as plastic vents that many have.
After hurricane Hugo, codes changed requireing this. Add in the proximity to the coast and Charleston being in a seismic zone, they changed a lot of things in the past 10 years.
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Quote de A930Rocket
Along the coast here in SC, you can't condition the crawl. Code requires so many sq inches of ventilation and vents within 12" of the ground, so water can escape in a flood.
no kidding? when the builder threw up our 'hood with conditioned crawl spaces it was the first to have such in the area. local inspectors insisted on vents as they didn't trust/understand this new fangled idea. eventually the vents were removed and filled in so the concept could operate properly.
but now i wonder, could there have been more to the story?
but what about a sump pump? our house has one and it would pump the space dry if it were filled in a flood i suppose.
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