Certified Heating, LLC

Certified Heating, LLC has served Hammond, Indiana and surrounding Lake County communities since its founding, building a reputation as a trustworthy residential HVAC contractor under owner Keith Nelson. With 81 customer reviews averaging 4.1 stars, the company maintains an A* rating with the Better Business Bureau and has been recognized by Consumer Reports for installing top-rated furnace and air conditioning systems. The team handles heating and cooling installations, repairs, and preventive maintenance for homeowners throughout the region.

What distinguishes Certified Heating is their commitment to transparent pricing and flexible service options. Multiple reviews highlight same-day furnace installations during extreme weather, with Keith Nelson personally overseeing projects to ensure fair estimates. The company offers included maintenance agreements for long-term clients, a customer benefit rarely seen in the industry. Al Rice Sr.'s review notes a 15-year maintenance plan was included at no charge following a complete system replacement.

Customer stories reveal the team's technical skill and reliability. Countess Cary's review details Keith Nelson and his crew installing two new furnaces in a single day during bitter winter cold, with fair pricing despite challenging conditions. Kenny Houdek, referred to as Ken in reviews, has been praised for precise installations and working within customers' financial constraints. Recent feedback confirms the team continues providing professional AC service while maintaining the same honest approach that has earned trust across two decades of operation.