<iframe width="580" height="385" src="https://www.youtube.com/embed/-A5ZJU28bOs" frameborder="0" allowfullscreen></iframe> <br>My shop: -20'6” x 20'6” with a 10' ceiling. All perimeter walls, except 12' of one wall attached to my house, are not insulated. <br><a href="https://www.youtube.com/watch?v=-A5ZJU28bOs">source</a>
