I wanted to reduce the radon in my basement. I made boxes for my three ventilators and fitted them into windows. The radon has been lowered to well below 100 from over 600. I'm very happy with the results.

I bought the Twinfresh to help reduce radon in my basement guest room. I am very pleased with the reduction in radon and how the ventilator is maintaining the temperature in the room within a degree or so, despite outside temperatures being below zero.

Much easier than I thought it was going to take. First I drilled a hole in the drywall that went clean though the outside tin all. I then cut a 6 inch hole in the drywall on the outline from the template, cut that with a knife, pushed the insulation away Then cut the outside hole with, my jigsaw. I did make the hole slightly smaller which was a small mistake but easily remedied with a coarse file. The only problem I had was making those drywall fasteners work.... I substituted better quality ones which work great. For my one room apartment this was a good choice.

Very good. Works better than described. Will definitely install more in my home.

It seem great, however it hasn't been installed yet. Planning on getting more if it works good.

The item is well packaged and easy to install. Highly reccomended

I installed this unit two weeks ago. Instructions for installation were very clear; took us less than two hours to have the unit in the wall and working. It is super quiet and completely ventilates the room. I highly recommend this product and will install more throughout our house.

Great! Perfect for our tiny house

Hard to find these single room HRVs and the only other option at Home Depot is 30% more expensive. Shipping was relatively fast and secure. Haven’t installed the product yet, but it came packaged very professionally and seems very well made.