****** - Verified Buyer
4.5
A good quick reference to go to for answerUsed to help pass my test HVAC d2 it helped on some code questions. Definitely go through it before the testcame right away. we ended up moving right after I placed this order and it was forwarded to my new addressI have used earlier versions of the national Fuel Gas Code - they are a good source of information. I use it for teaching technicians.Required information for my architecture officejust what I needed for my work
