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Best HVAC / Furnace
Repair & AC Repair in

Why These HVAC Professionals?

Our goal is to connect people with the best local experts. We scored Frederick HVAC Professionals on more than 25 variables across five categories, and analyzed the results to give you a hand-picked list of the best.

Reviewed Curated Top Picks 28 22 13

Our Selection Criteria:

  • 1. Reputation

    A history of delighted customers and outstanding service.

  • 2. Credibility

    Building customer confidence with licensing, accreditations, and awards.

  • 3. Experience

    Masters of their craft, based on years of practical experience and education.

  • 4. Availability

    Consistently approachable and responsive, so customers never feel ignored.

  • 5. Professionalism

    Providing service with honesty, reliability, and respect.

ACR Services

ACR Services is a team of home heating and cooling specialists with a passion for “Keeping Maryland Comfortable.” The company’s Master technicians are standing by day and night to respond to any repair emergencies, and have the skills and training to service all major brands and models. In the summer heat, a well-maintained air conditioner is essential for staying comfortable, and every member of the staff is committed to being the leading provider of reliable, cost-effective maintenance, repairs, and installations. Customers can choose from an extensive range of new cooling, heating, and air quality systems, including geothermal systems that harness the power of the earth to provide significant saving on energy bills. The company also specializes in commercial refrigeration services like regular preventative maintenance, expert diagnostics, and new unit installations.

Jefferson, MD 21755


Advanced Service Air Conditioning and Heating

The technicians and staff at Advanced Service Air Conditioning and Heating have over 100 years of combined industry experience and take pride in giving customers throughout the Middletown area the finest level of service and support. The company sells a full range of new, energy-efficient air conditioners, furnaces, and heating systems, all from top brands like Trane, Goodman, Lennox, and Ducane, and all expertly installed for superior performance and reliability. The company also offers custom-design service to ensure complete satisfaction with every new system, including geothermal heating and cooling systems that use the insulation power of the earth to provide maximum efficiency and significant savings on energy bills. For even greater value, the company offers financing for qualifying customers to make indoor comfort affordable on almost any budget.

Middletown, MD 21769


Air Doctor

Air Doctor is a provider of healthful, comfortable, and energy-efficient interior climates in Boonsboro and other parts of Maryland. The company holds a North American Technician Excellence certification, and it is a family-run local business that knows the indoor air quality needs of the community. The team provides maintenance work to slow down the wear and tear of HVAC equipment, as well as help clients prevent costly malfunctions and breakdowns, and the customer types include homeowners, store managers, property flippers, realtors, and construction firms. Air Doctor has been around for more than 20 years, and it is an authorized dealer of top-notch American Standard products. The crew handles commercial and residential emergencies 24/7 to make sure that the building occupants are comfortable day in and day out.

Boonsboro, MD 21713


Antietam Heating Air Conditioning and Refrigeration

Antietam Heating Air Conditioning and Refrigeration has been delivering outstanding customer service and top-rated indoor comfort equipment for more than 30 years. The Frederick-area HVAC business specializes in the service, installation, and repair of heating, air conditioning, and refrigeration equipment for homes and businesses. The owner-operated company has a reputation for honest service, hands-on expertise, and competitive pricing that exceeds customer expectations. Antietam Heating Air Conditioning and Refrigeration provides quality and value to customers by maintaining a team of experienced technicians with the expertise to handle HVAC jobs of all sizes and complexities. Customers can enjoy peace of mind knowing that knowledgeable professionals can service all types and brands of equipment for restaurants, bars, liquor stores, and other commercial applications. The company keeps dedicated, trained experts on-call to handle any emergency service or critical repair situation.

Frederick, MD 21705


Clemair Heating and Cooling

Clemair Heating and Cooling provides customers in the New Market area with a full range of HVAC equipment sales, service, and installation. The veteran- and family-owned company specializes in delivering high-quality indoor comfort solutions that meet a variety of individual needs and budget requirements. The full-service HVAC business has over 20 years of experience in residential and new construction and enjoys a reputation for providing outstanding service. Clemair Heating and Cooling maintains the necessary licensure and insurance to perform services in the safest, most professional manner possible. The heating and cooling system professionals have the expertise to work with all brands of equipment systems and products including air conditioners, heat pumps, furnaces, thermostats, whole-house air cleaners, humidifiers, and more. Clemair excels at troubleshooting problems with existing systems that eliminate costly repairs, prolong system life, and save money on utility bills.

New Market, MD 21774


Donald L. Lowe & Sons

Donald L. Lowe & Sons specializes in providing Monrovia-area clients with comfortable home and work environments. The family-owned and operated indoor comfort experts specialize in selling, servicing, and installing a range of heating and cooling equipment that meets a range of needs and budgets. Residential and light commercial clients have relied on the expertise of Donald L. Lowe & Sons with more than 40 years of hands-on experience in the HVAC industry. The full-service comfort specialists value customer satisfaction by featuring a team of highly trained, certified HVAC technicians with the expertise to handle jobs of all sizes and levels of complexity. Clients can trust Donald L. Lowe & Sons to perform expert diagnostics, repairs, and installations for all makes and models of HVAC systems that exceed expectations.

Monrovia, MD 21701


Eric Smock Heating & Air Conditioning

Eric Smock Heating & Air Conditioning, Inc. has been serving Frederick County with excellence for more than a decade. The trusted HVAC specialists focus on complete customer comfort and satisfaction by providing reliable, dependable service that exceeds expectations. The business ensures smoothly operating comfort systems and energy efficiency with professional installation, maintenance, and repair services. Eric Smock Heating & Air Conditioning, Inc. features a team of well-trained, NATE-certified HVAC technicians with exceptional skill and customer-focused service delivery. The HVAC experts maintain knowledgeable, friendly staff with the expertise to design heating, cooling, and indoor air quality services that ensure comfortable indoor temperatures and enhanced air quality. Eric Smock Heating & Air Conditioning, Inc. makes quality a top priority by working with industry-leading HVAC equipment manufacturers like Trane, Mitsubishi Electric, Aprilaire and Honeywell.

Ijamsville, MD 21770


Frederick Air

Frederick Air ensures customers enjoy comfortable indoor temperatures and cleaner, healthier air. The Bryant Factory Authorized Dealer maintains the technical expertise to install, repair, and maintain a range of indoor comfort equipment that exceeds customer expectations. The Frederick-area heating and cooling experts specialize in providing clients with high quality, affordable solutions that include top-quality equipment and services. NATE-certified technicians stand ready to service all brand makes and models with the highest level of expertise. Customers can trust Frederick Air to deliver services that prolong equipment life, achieve energy efficiency, and save on utility costs. Residential and commercial customers have relied on the top-notch service and product expertise of the business for more than 20 years. The fully licensed and insured HVAC experts enjoy a reputation for quick, honest work at a fair price.

Frederick, MD 21701


Larry & Sons

Larry & Sons is a plumbing, heating, cooling, drain, and electrical company that's been providing services in Frederick and the surrounding communities since 1960. Its licensed, bonded, and insured HVAC technicians offer repairs, maintenance, and installation services for furnaces, heat pumps, air conditioners, boilers, zone control systems, humidifiers, dehumidifiers, and air cleaners. The team also handles drain and sewer repairs, drain cleaning, prepping, water line inspection, foundation waterproofing, wiring, and generator installation.

20 Hump Rd
Hagerstown, MD 21740


Mason Mechanical Services

Mason Mechanical Services is a licensed provider of heating and cooling solutions in Jefferson that operates 24 hours a day, seven days a week. The firm has been satisfying commercial and residential customers for more than 25 years, and it has two locations in Virginia and Maryland to deliver quality services more quickly. The company gives 12-month warranties on new installations, and the products include rooftop units, ductless mini-split systems, chillers, boilers, and heat pumps from major brands, such as Mitsubishi Electric and Johnson Controls. Mason Mechanical Services also handles custom ductwork projects, and it offers preventive maintenance to minimize the risk of costly malfunctions and untimely replacements. The staff welcomes inquiries about the availability of convenient financing options and seasonal discounts.

Jefferson, MD 21755


Real Comfort Systems

Real Comfort Systems is a licensed heating and cooling contractor in Jefferson that strives to make homes energy efficient, comfortable, and safe from harmful airborne particles. The team consists of carefully screened, drug-free technicians with decades of combined professional experience, and some of the services are indoor air quality testing and improvement, whole-house dehumidification, programmable thermostat installation, heat pump upgrading, packaged air-conditioning unit replacement, fan coil tune-up, condenser troubleshooting, gas furnace repair, and duct cleaning. Real Comfort Systems gives parts and labor warranties, as well as discounts, and it offers annual maintenance plans. The crew responds to commercial and residential emergencies 24/7, and it handles most makes and models, including American Standard, Bryant, Carrier, Daikin, Honeywell, Mitsubishi Electric, Payne, Trane, and York.

Jefferson, MD 21755


Right-A-Way Heating & Cooling of Frederick County

Right-A-Way Heating & Cooling of Frederick County is a licensed, bonded, and insured HVAC contractor in Walkersville that operates 24/7. The company is a family-owned and operated business that understands the locals’ need for prompt, affordable, high-quality services, and it services most major brands, including Amana, Broan, Carrier, Lennox, Rheem, Ruud, Trane, Westinghouse, and York. The crew consists of competent and courteous technicians with years of combined industry experience and training, and some of the tasks are refrigerating equipment inspection, geothermal cooling system upgrading, air cleaner replacement, humidifier tune-up, boiler repair, and ductwork. Right-A-Way Heating & Cooling of Frederick County has been part of the community for more than 10 years, and it accepts American Express, Discover, MasterCard, and Visa payments. The crew responds to commercial and residential emergencies 24/7.

Walkersville, MD 21793


W.A. Tolbard

W.A. Tolbard is one of the most respected providers of heating and cooling solutions in Frederick. The firm has been satisfying residential and commercial clients since 1988, and it holds an approval from North American Technician Excellence. The company has built its reputation on integrity, technical ability, and competitive pricing, and it sells, installs, and maintains HVAC equipment, gas stoves and inserts, and fireplaces. W.A. Tolbard has the motto, “Exceptional Service. Ultimate Comfort,” and it is a local establishment that knows just how to keep homes, workplaces, and recreational environments energy efficient and free of pollutants and allergens. The staff offers financing plans, and it does not charge for the estimate. The shop’s website contains tips on caring for heat pumps, humidifiers, and other units, and it features some of the team’s recent projects.

Frederick, MD 21701


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