Review on 🌬️ COSFLY Indoor Air Conditioner Cover - AC Unit Protective Cover for Interior - 25 x 16 x 3 inches (Length x Height x Depth) by Marty Wainwright

I plan to use these heaters for window blocks that I don't want to remove in the winter. We live in a part of the country where temperatures can drop slightly below freezing (F) for long periods of time. These covers are too light to really protect against the cold. However, I solved the problem by first gluing the 3/4" thick foam insulation to the size of the A/C front, THEN putting this cover over the foam. I will edit this review if it still doesn't work The laces keep the case in place but definitely don't make it airtight.