Hardcastle Air is your trusted HVAC company in Twin Falls and Kimberly, ID, with over 18 years of experience. We specialize in residential air conditioning repair, furnace repair, and AC unit and furnace replacements. As fully licensed HVAC contractors, we also offer services for plumbing and general contracting, as well as light commercial services. Our EPA certification ensures top-quality work with no hidden costs. Get free estimates and second opinions on diagnostics. Call 208-731-2575 for reliable heating and cooling services, including affordable AC diagnostics and residential furnace replacements in Twin Falls, ID.