The following is my opinion:Had an interesting experience with Specialty. My gas furnace stopped working- air wouldn't circulate. Called Specialty- they charged $99.99 to come out and diagnose the problem. OK, "Tech" came out, looked at my furnace, said it was the gas valve. Wanted $500 plus to change a solenoid. OK, no choice (solenoids are cheap in actuality). Changed solenoid. Furnace still didn't work. "Tech" then said it was the control board, and there might have been a "domino" effect with the solenoid. Cost to replace the control board? $439.00 ( I went online and found the manufacturer's price is $98 plus shipping). DON'T USE THESE GUYS- THEY ARE PRICE-GOUGERS AND THEIR "TECHS" ARE REPLACEMENT ARTISTS!