Keeping Valley Homes Healthy Safe & Warm since 1980! HeatSource Mechanical has been working every day, for over 37 years to keep our customers safe and warm. We are always available and we offer a 100% satisfaction guarantee. HeatSource Technicians are all NATE certified and experts in their field. We serve Chugiak, Eagle River, Big Lake, Palmer, and Wasilla. Keep your family warm and cozy, call today!