Product review (5 stars): Heartland 21000 dryer vent
I was looking for a dryer vent that would be a challenge for mice to enter and yet not require cleaning the exterior every two weeks. The installation instructions call for cutting into the siding to achieve a true vertical install. I preferred to build a base out from the house so that I would only put two holes in the siding to attach the top lid. I used the Extension Accessory to complete my install.