(301) 389-5450

Are you looking for a team of experts that you can trust to help you with your heating, cooling, and electrical needs? We at GAC Services have been providing excellent service for over 50 years, and we’re ready to help you with any problem you are facing.

For reliable heating, cooling, or electrical services in Frederick County, Maryland, including Thurmont and Emmitsburg, call us at (301) 945-8397 to schedule an appointment.

We Offer Extensive Heating Services

To keep your home and commercial building comfortable and cozy during the cold Maryland winters, you need skilled technicians who can help you with any heating problem you’re facing. When you need a new unit, fast repairs, or long-lasting maintenance, our experts will get the job done.

Our heating services include:

Air Handlers

Heat Pumps

Gas Furnace

Heating Maintenance

Heating Repair

Heating Replacement

Heating Installation

Ductless Heating and Cooling

Hybrid Heating Systems


Zone Control System

Stay Comfortable With Our Cooling Services

Are you having problems with your air conditioner? A faulty cooling system can be dangerous and certainly uncomfortable when the temperatures rise. Trust that our professionals will keep your unit in good working condition so you can relax while you are at home or work. We prioritize your safety and comfort, so when emergencies strike, give us a call.

Our cooling services include:

Indoor Air Quality Services Can Improve Your Home

You may not know it, but the air you are breathing could be dangerous. If there is a high amount of dust or germs in your air ducts or your home is too humid or dry, you may want to find a solution. Our indoor air quality experts can inspect your environment and find the reason for your issues. Whether the cause is due to poor maintenance or related to your HVAC unit, we’re committed to improving your air quality.

Our indoor air quality services include:

Air Duct Cleaning

Air Duct Sealing

Air Duct Testing and Repair

Air Filters

Air Filtration Systems

Air Purifiers



HVAC Sanitizing

Electrical Services For Homes & Businesses

If you attempt to handle your electrical repairs or remodeling by yourself, you may end up getting hurt and damaging your system. Trust our experienced electricians to help you with whatever project you are working on, and we’ll finish it in just a matter of time.

Our electrical services include:

Ceiling Fan Installation

Electric Car Charging Stations

Electrical Inspections

Electrical Installation

Electrical Repairs

Electrical Replacements and Upgrades

Indoor and Outdoor Lighting

Network Cabling

New Construction Electrical Services

Outlet Replacement

Pool and Hot Tub Wiring

Security Lighting

Service Panel Upgrades and Circuit Breakers

Smart Home Products

Under Cabinet Lighting

Whole Home Surge Protection

Wiring and Rewiring

Our Generator Services Help You Stay On Task

Power outages mean that you can lose control of your heating and cooling units, electronics, and appliances, like refrigerators. To prevent these things from happening, install a backup generator and enjoy protection during these unwanted events.

Our generator services include:

Generac Generators

Generator Installation

Generator Repair

Whole Home Generators

GAC Services is here for you, no matter the day or time. Trust that we will find a solution for your various troubles. Contact us today for reliable heating, cooling, or electrical services in Frederick County, Maryland, including Thurmont and Emmitsburg.

Areas We Serve in Frederick County

In Frederick County, we serve the following areas: