Roy my friend, that statement is simple not true, in fact is so far from the truth you would need a good IR camera to see it…LOL
I do a ton of mold testing nowadays and the ir cameras help in so many way I cant see how some of my competition are still in biz without using IR.
I also use it as a great tool on inspections, but it is rockin my mold world skills here.
About a month ago I had someone call me and ask me if I could help them figure out why they had no air (very little) blowing out of a air register. They told me another inspector and 1 HVAC company both told them the duct must have come apart and they needed to cut major holes all over to try and find the leak simply by guessing.
OK so I told him about IR and told him I couldn’t guarantee anything but I would give it a try at 200,00 bucks an hour with 1 hr minimum. This was a 1st for me for such a thing. OK so long story short, his house was warm so I cranked on the AC, and low and behold I could see and followed the duct work towards the register with little air, well about 5’ from the register their was a big blotch of blue which meant to me the air was leaking there. The guy took out a drywall saw cut about a 3’x3’ square, and BAMMM, they did a crappy job of taping and also used regular old duck tape, and the connection came loose enough that most of the air was leaking. I had some real foil tape in my truck, gave the guy some, he wrapped the duct, and …well I will admit I felt like a hero…LOL
200 bucks for about 45 mins which included 30 mins of talking about nonsense.
Bottom line there are so many different ways to use and make good loot with IR.