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Gaithersburg’s Premier New Heating Installation Contractor

Here at Mannix Heating & Cooling, we offer installation and replacement services for all makes and models of heating systems. Our expert team is factory trained, NATE certified, and BBB accredited, so you know that you will always get the best quality service when you call us. We are proud to be a Carrier Factory Authorized Dealer, and we are regularly updated with the most up-to-date technology and products on the market today.

Heating InstallationHeating System InstallationFurnace Installation ServicesHVAC Installation ∴ Gaithersburg, MD


When you’re looking for the perfect heating system for your Gaithersburg, MD home or business, Mannix Heating & Cooling has the perfect solution. With a wide range of furnaces and heat pumps, we can offer basic solutions or innovative features that will take your home into the future. Unsure of which heating installation or replacement to choose? Don’t worry. The experts here at Mannix Heating & Cooling can accurately calculate your home’s heating requirements, design the best and most cost effective system for you, and complete your professional and precision installation.

Your Trusted New Heating Install Team

Our heating installation and replacement services are here to offer more than just temperature control. Our goal is to create an indoor environment that is always comfortable for you and your family, year round. Trust the professionals here at Mannix Heating & Cooling to meet and exceed your expectations. Call today for an estimate.

Heater Installation, Heating Replacement, Furnace Installation, Furnace Replacement & Heating Replacement in Gaithersburg, MD

HVAC Installation in Gaithersburg, MD | Heating Replacement

Heating InstallationHeating System InstallationHVAC InstallationFurnace Installation Services ∴ Gaithersburg, MD

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Customer Reviews

Shondra J ones

They were lifesavers!!! My furnace went out and after three days of dealing with the home warranty company and the unscrupulous vendor they sent to my home, I called Mannix. The service technician was friendly, efficient but most of all honest. He found the problem after twenty minutes, saving me thousands in unnecessary replacement costs. It is refreshing to know that honest people still exist.

Heating Installation

Furnace Installation Services

Heating System Installation

HVAC Installation

Gaithersburg, MD