As mentioned earlier it is recommended to have a minimum open space of 18 inches under the joists as it will allow the air to pass unaltered and unhindered under the deck.
Under deck ventilation fan.
A high airflow fan designed to provide temperature and moisture control for crawl spaces and basements.
The systems room containing 4 water heaters 3 provide hydronic heat for radiant floor heating and 1 for dhw is an exterior room off a walk out basement.
The issue isn t so much about the wood as it is about the growth of harmfull molds growing under the deck and a breeding ground for misqutos.
Venting under deck i have 2 trinitys venting under decks and in both cases i extended the exhaust out past the edge and insulated the exposed portion i would think from a building point of view that you could have ice build up.
The difference is that a power vent water heater pulls in combustion air from the space around the appliance then uses a fan to propel the exhaust through the vent.
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Silver galvanized steel crawl space fan vent model v2d 146 32 146 32.
Depth of deck to bot of dirt is approximately 18 20.
2000 sq ft of deck 3 4 x 4 cumaru planks with 3 8 spacing over 2x8 pt joist and double 2x12 pt beams over helical piles.
Green metal shutter exhaust fan model 9800517 229 56 229 56.
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Reduce humidity to prevent mold growth while ventilating out odors and pollutants with fresh air.
Professional grade products 20 in.
How to ensure proper deck ventilation.
After original construction a landing was added off a wrap around deck that is over the top of this systems room.
There is very little ventilation on all sides.
So now the 4 exhaust vents are under the deck landing.
Vie air 30 in.
Decovent light grey vent unit model 04 68 48 piece 68 48 piece free delivery.
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Black tilting mountable heavy duty commercial strength oscillating wall fan with 3 speed motor model 985109801m 194 44.