These frames have a low thermal conductivity, decreasing heat transfer from outdoors to inside

https://open.substack.com/pub/lukasubrs796/p/make-a-sustainable-choice-pvc-frames?r=3p6nq0&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true

These frames have a low thermal conductivity, lowering heat transfer from outside to within