Frost King V73/9H Indoor Shrink Window Kit 42 62-Inch, Clear, 9-Pack

Good, strong film that makes quite a bit of difference and is (relatively) easy to apply. The only drawback is that the way the sheets are cut can result in a lot of waste, depending on the size of your windows. I probably wasted a third to a half of each sheet. Also, the creases in the folds remained, which means that the film is visible. That doesn't bother me, but it may be an issue for more aesthetically-minded people.

ok

TLDR: After using this product to secure my home, my energy bill dropped significantly I moved into a small 20 yr old townhome in Nov 2019, around 1500 sq ft. I was surprised to get my first heating bill (I live in Richmond BC, by gas via Fortis BC). It was way beyond any utility bill I have paid. A year later I decided to install this window insulation kit and you will see in my attachment that my energy used dropped signifcantly. To put things in perspective, remember that in 2019/2020 Jan and Feb it was still ok to go to work and travel so we were barely home and I had the heat down during the day; whereas 2020 we are home all day and needing heat as well. The average temp for both years were 5 celcius in January 2019 and 2020 with 4 celcius in Feb 2019 and 5 celcius in Feb 2020. Overall, I highly recommend this product to those who want to insulate their home better. Especially those that are older with single pane windows.

Very inexpensive way to help warm the house. The films really make a difference! It is a bit challenging to peel the tape, though. I found ripping it a little helps.

This did well in keeping a lot of the frost out last Winter. However, they looked horrible on our windows. The crease lines from being folded up in the box did not go away and they did not sit nice on the window