Heatexchanger.ca also located in BC, Canada does the samething with carrier/Payne units . But the prices are lower . Excel charges way too much also excel is partners with a lot of the grow shops so the shop needs a cut too . 500$ for doing nothing to my understanding you have to go through your local store ..Excelsux1, you are so right about Excelair, cheap equipment with high price. You need any custom ductwork done, go to ECCO in Langley, they are awesome to deal with.