Do Replacement Windows help with heat?
Can Vinyl Windows instead of Aluminum Windows make a difference.
An hour or so later the old ones were out and I had some new ones starting to go into place. This is actually three windows mulled together.
This set came in at .27 U Value with a .19 Solar Heat Gain Coefficient. That's pretty awesome. The numbers are actually a little better on SHGC when you have grids as they block the sun and lower that number.
So we're making progress. I noticed once I set the two bottom ones you could almost feel the heat above them immediately. I tried to catch in on film. You have to decide if I did or not.
But the process continues. I set the half circle and started the process of squaring them all up together. The mullions make it so they have to straight and next to each other, but the new ones being square is more important than being straight with the house. It's a long story but sort of irrelevant for this story....
I got them in and it was time to seal. I went out to get caulking guns and glass cleaner. When I came back, my customer had produced a cool laser light thermometer. I've seen the air conditioning guy use these before. They tell you if the air at the vent is coming out cold. Interestingly enough, it will also tell you an amazing fact about heat reflective glass in modern vinyl replacement windows.
That fact is: They totally rock.
I got the bead of sealant around the window by around 1:20. The room was still pretty warm from being wide open just a few minutes earlier. The sun was heading down in the West right into the front yard we were working on. As I stood on the ladder caulking the second floor window I could feel the heat being reflected alright.... right into my face... making me very miserable.
So back to the thermal thingy. Sill temperature inside on the center of the sill at around 5:30 was 77 to 78 degrees after the house had re-equalized. I thought that was great. It was working. This was about the same temperature as the house itself.
Here's where it gets super amazing and brings up an ever interesting subject - Conduction and Convection Heat. I know you're excited! Here's the picture that creates the discussion.