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I wondering how airtight these things are when closed. I have an unused AC outlet from the central air that I'd like to feed into a closet but I don't want the air conditioner creating positive pressure when the exhaust fans aren't running. I thought I'd get a normally closed motorized damper...

Air cooling the 400W in the tent is way too effective now that it's cold and the fan which exchanges air is only running every 20 minutes or so as it just isn't heating up enough. I fear the air is getting stale in there. Does anyone use a sealed reflector like the Cool Sun XL and NOT air cool...

When I checked the room tonight there was a good amount of water in the ducting which is used to bring air from the attic through the light and back out into the attic. Enough that when I moved the insulation a stream poured on my head. It seems that the metal collars which connect the duct to...

I'm using Rubbermaid 10 gallon containers and have been using the lids as trays for them. I've got these old Raindrip drip irrigation kits that I'd like to hook up so I can auto water and I need a way to get the lids/trays to drain back into the water reservoir. I know that there is a part...

If I want run duct through a ceiling, in order to get to an attic vent, what is the correct way to do this. I've seen lots of metal parts in the HVAC aisle at the Home Depot but I can't get the right combination. Does anyone know the right sequence of parts for this airflow diagram.... light...

Now that it's cooler I've noticed that my exhaust system doesn't run at all when the lights are off. Is this a problem? I have ventilation on a thermostat and it's just not getting warm enough during the night cycle. Temps never drop below 68.