Healthy Air Inc. is toll rip-off. First of all they are not going to clean your ducts properly secondly all their warrently claims are phony. If you call them back with complaint they are just going to hang-up your phone.
At my Gas Dryer tech's suggestion, I called these guys to clean-up my dryer duct. They didn't clean any thing and charged me approx $300.00; My dryer tech rejected the duct cleaning work, I end-up getting duct cleaned from other company.
This company is a SCAM; never use the,