I am building a 4000 sqft. house. i will have spray insulation R36 in outside walls and R40 in rafters. Wanting to know if any buddy is using either of the units and how cost effective they are. I can get both units at cost due to brother in law is a dealer. he is pro york, but would like to hear from others. robert i ment a yzh york model
Last edited by ldfootsped2; 01-22-2011 at 10:27 AM.