Find and Invite the Best Commercial HVAC Contractors in Gaithersburg, MD

Coastal Heating & Air Conditioning Co., Inc. is a family-owned business with over 50 years of experience, providing a wide range of HVAC services including installation, repair, and maintenance for residential and commercial customers in the greater Annapolis, MD area. They specialize in air conditioning, heating, geothermal solutions, and indoor air quality, and are committed to offering exceptional service with a satisfaction guarantee.

Call Crowley, LLC is a full-service HVAC and plumbing contractor offering emergency services, repairs, and installations for residential and commercial properties in Vero Beach, Florida, and surrounding areas. The company is led by Jim Crowley, a licensed master plumber and master gas fitter with over 100 years of family experience in the industry.

Long's Corporation is a third-generation, women-owned and operated company providing residential plumbing and HVAC services in the Northern Virginia area since 1936.

Mannix Heating & Cooling is a family-owned and operated HVAC company that has been serving Gaithersburg, MD, Chantilly, VA, and surrounding areas since 2010, and expanded to serve St. Petersburg, FL, and surrounding areas since 2024. They offer a comprehensive range of services including installation, maintenance, and repair of heating, cooling, and electrical systems, and are recognized as a Carrier Factory Authorized Dealer.

Since 1992, KMN Mechanical has been providing superior mechanical HVAC contracting services in the Washington metro area, building a reputation for quality work and exceptional customer care. The company maintains offices, a shop, and a warehouse in Springfield, Virginia, and offers services including air conditioning, heating, sheet metal fabrication, ventilation, and welding.

Welch & Rushe is a full-service mechanical company offering a comprehensive range of services including 24/7 emergency HVAC and plumbing services, preventive maintenance contracts, and construction services, with over 50 years of experience in the industry. They serve clients in Maryland, Pennsylvania, Virginia, the District of Columbia, West Virginia, and have completed projects worldwide.

Molecular Systems, Inc. is a construction firm specializing in roofing, drywall, HVAC, plumbing, and waterproofing for large-scale projects, serving as a regional supplier of construction supplies to businesses and government agencies in the Washington D.C., Maryland, and Virginia metropolitan area.

Priority Mechanical Contractors, LLC (PMC) is a company that provides HVAC services, installation, and energy conservation solutions to multi-family and commercial property management and construction industries, with a focus on large-scale multi-family projects and a reputation for completing projects on time and within budget.

Hugee Corporation is a family-owned and operated HVAC company that has been serving the residential, commercial, and industrial needs of the Washington D.C. Metropolitan area since 1984, offering a wide range of heating, cooling, and indoor air quality products and services, including emergency services.

B&R Construction Services, Inc. is a multi-disciplinary firm founded in 1992, offering mechanical, electrical, and plumbing (MEP) engineering, design, construction management, and dry utility design and commissioning services. With a staff of 37 professionals, including 5 registered engineers, they serve a variety of sectors such as commercial, retail, mixed-use, and entertainment, and are located near BWI Airport.

OpenWorks is a total facility management company offering a suite of services including commercial cleaning, landscape maintenance, pest control, HVAC, electrical, lighting, handyman, plumbing, and supply replenishment to various industries such as education, healthcare, residential property management, and more. The company prides itself on operational oversight, consistency, and a franchise model that ensures quality and reliability across multiple sites.