TALK TO THE HVAC SPECIALISTS IN DE MOTTE AND CROWN POINT, IN HVAC services that make your comfort a priority Quality HVAC service starts with TM Heating & Cooling, LLC. For years we've helped homeowners and business owners alike with their HVAC systems. Our approach is to treat our clients' houses and commercial spaces like we would our own. The skilled service people on our team will assess your HVAC issues, walk you through our recommendations and quickly solve the problem.