Dependable heating, Plumbing, and Air Conditioning Services for Customers in Keymar, Maryland

For the last 30 years, Horizon has been providing quality heating and air conditioning services to families, homeowners, and customers in Keymar, Maryland.  As a certified and insured company, we ensure that our technicians undergo the necessary training and are equipped with quality equipment to handle their work. You can trust the team at Horizon to get the job done right.

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Contact us today for more on our tune-up services.

Air Conditioning

Are you experiencing thermostat problems, dealing with leaking ducts, or having low refrigerant levels?  You can leave all the hard work to the heating and cooling experts at Horizon. Apart from offering professional tune-ups, we also provide AC repairs in the Keymar, MD area. Our technicians also handle new air conditioner installations. Contact our team today for all your air conditioning needs.


Is your boiler not functioning as expected or your heater making unusual noises? Horizon has a team of qualified heating experts who can check your unit for problems and fix it. If you need to replace your old, broken unit, our technicians can recommend a suitable model to keep your home warm without you incurring crazy energy bills.


Some of the common plumbing problems in and around the local area include clogged toilets, low water pressure, dripping faucets, jammed garbage disposals, and more. Our plumbing experts can help repair any issue you may be having with your plumbing systems. We also provide

Horizon Loves Keymar

Horizon is glad to serve everyone in 21757. We also love visiting Detour Winery and its selection of fine wines in the Keymar area. What we enjoy most about the community, however, is the customers we have grown to know and love. Call us today for all your heating and cooling needs.

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Connecting you to your local Horizon team for expert technicians, same-day service, and a job done right.