I have the additive on virtually every square inch of the inside of my house. 2 layers...I mixed it in primer and spread it on thick before adding the regular paint.

I also have aluminum radiant barrier spread across my entire attic on top of 1 ft of fiberglass insulation.

When my attic temperature was about 125, the inside temperature on my ceiling was only about 78 or so. I thought I posted this in here before. That is almost 50 degrees cooler!! None of that attic heat made it through. That is also 78 when the outside temp was about 100.

Basically, I needed no air conditioning and I used 1 single box fan sitting on top of my attic access panel. It is aimed upwards into the attic. When I turn it on, it does push the hot air out of the attic, but since that heat isn't making in into the house, that isn't the benefit of the fan. I close all the doors and windows in the house and crack the door to the basement. Basement stays bout 55 all year round. With the fan on, it sucks cool air from the basement into the main floor towards the fan and into the attic. So 1 box fan gave a cool breeze to and moved air on the main floor and basement, which is a combined area of over 1600 square feet.

My electric bill hasn't been over $45 in any month...usually I do not have the fan running because it isn't needed...if 80 outside, inside stays in the low 70's. The house just stays cool inside no matter what.

$45 is with about $6 taxes so that is about $39 in electricity. It is for about 625kwh per month. I have one desktop computer running 24/7 in the basement and that alone is 250-300watt hours non stop and a laptop on 24/7 and it takes 60watts nonstop...together, both computers account for over 30% of my entire electric bill. I average 1000watts of usage at any given time for the whole house.

If I "power factor correct" my house, I can probably drop the power usage by 1/3 easily since most of it is inductive loads (things that use a magnetic field in their power supply - computers, refrigerators, etc...).

Anyway, you can see I have no real cooling bill.

This past winter, I upgraded the burner on my oil furnace to a Beckett AFG high efficiency burner. I'm not interested in relying on grid-tied gas heat so I stayed with oil. It is blown hot air so doesn't keep the inside as warm as radiant heat but I didn't spend much on heating. The heat generated on the inside of the house stays inside much longer since it hits the paint additive and stays inside...and anything that does move through the paint on the ceiling will hit the radiant aluminum barrier. Basically, the heat I make stays in the house. I still have to replace my windows to newer vinyl windows and this will help even more.

Soon, I'm having the chimney repaired and will have a high efficiency fireplace insert since I love wood heat. It is also radiant so with a little wood, it will roast the entire main floor. I won't need to use a lot of wood since I will keep the heat in that I make for much longer than without the additive. So it works both ways in the winter and summer.