We built a house last year and had the HVAC installed, the hvac tech put the heat exchanger in place for me but other than that I did all the Hardy install.
We moved in May 2012 and no problems, just a little cool in the basement, I thought the basement would be toasty warm in the winter since the furnace is down there. It is cold.
I checked the diffusers and they are hot but no air is coming thru them. I removed one and it has a square piece of steel blocking the air flow. The surface of the diffuser looks like a pin cushion. I tried to get me hvac guy to swap with me but he said that is all he has.
I found a one with a damper at a supply place that works well, but they are $50.00 each.
btw these are 24" lay ins for a drop ceiling.
The gist of my novel is.. does this resourceful group have a cheaper solution?
I need to be able to close them in the summer. The basement stay plenty cool enough for my wife without ac.