Did you deduct the window sq ft from the wall sq ft.
I need to read the instructions!!!
Got you on one been! HVAC-Calc deducts the size of the windows from the wall area along with doors so you just measure the gross size the add the additions. It kept giving me errors when I was running the first floor so I read the help guide.
One thing you may want to look into is interior storm windows. They are way less expensive than replacing your windows, preserve the look of the house, give you the advantages of modern low E glass, and are easy to remove if you want to open a few windows during mild weather.
Great idea. I was thinking the replacement of all the windows would never give a ROI. Living in the Dallas area all my life, I never thought about storm windows. I thought they were a package deal with the main window. I'll look into them as that sounds like a great efficiency saver. Thanks!
Also consider cellulose for the walls. That old of a house will be slats and plaster for the walls, correct? I wonder if filling a wall like that will be easy or hard.
I've heard that adding storms brings a lot of the benefits of new windows without the
What's the rest of the house/property look like ?
It's drywall over 2x4 studs with 1x6 dovetailed boarding faced by brick. You can see in the photo of the return posted earlier the look of the wood behind the return grill. I don't think the retro filling would be that difficult but may be costly due to the size and number of windows where the wall would need to be accessed both above and below the windows. I will get a quote one day though.
Good jobs that fill the walls with cellulose should be doing two fills.
One midway up to fill the lower half and then a second fill, close to the top
to fill it up the rest of the way. Foaming does this too - so its said.