Expert Heating and Cooling, Inc., was founded in 1975 on the principals of quality, integrity and service. Bob Maharas and Ge ... orge Burns carried on that tradition until 1998, when Mark Angellotti purchased the business from Maharas following Burns retirement. Angellotti was well aware of the growth potential having previously served as the Territory Manager for Carrier Great Lakes, Expert’s primary material supplier. Starting in a 2,400 square foot shop in Downtown Trenton, moving to a 4,200 square foot shop in Woodhaven while our newest building on Northline just west of Telegraph weighs in at a hefty 21,500 square feet. The result of these moves; business has expanded to serve a wider variety of HVAC needs across the Metro Detroit area. The company has transitions in the last 15 years from 99% residential replacement and service, to a mix of 55-60% commercial installation and service. read more