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The contractor demonstrated strong installation quality and project management on large-scale plumbing work, completing a 36-unit water valve replacement without leaks and a sewer system hydro jetting on schedule and within budget. However, a residential AC service experienced reliability issues including incomplete initial parts availability, a water leak that affected a neighboring unit, and billing complications stemming from payment processing failures.
Based on Google reviews
About the Contractor
Harvey W. Hottel, Inc. has provided commercial HVAC installation, design, and maintenance services from its Gaithersburg, Maryland headquarters at 18900 Woodfield Road since 1945. The family-owned firm specializes in commercial applications across municipal buildings, office complexes, educational facilities, and retail properties throughout the DC metropolitan area. Geothermal HVAC systems are among the technologies the company installs, delivering individual room control, 3–6× the efficiency of conventional units, and underground pipe systems projected to last up to 50 years. Harvey W. Hottel also installs variable refrigerant flow (VRF) systems for zone-specific temperature control in multi-unit commercial buildings. The company holds LEED-certified contracting credentials and employs licensed mechanical engineers and technicians. Operating continuously for over 79 years, Harvey W. Hottel combines long-standing regional relationships with modern commercial mechanical engineering capabilities.
LEED-certified commercial geothermal contractor with 75+ years of experience serving the DC Metropolitan Area from Gaithersburg.
Service Details
schedule
Years in Business
81 years
factory
Brands Installed
WaterFurnace
water_drop
WaterFurnace
Authorized Dealer
Business Hours
Mon7:30a-4p
Tue7:30a-4p
Wed7:30a-4p
Thu7:30a-4p
Fri7:30a-4p
SatClosed
SunClosed
Service Area
Serves 2 areas across Maryland
Washington D.C.Georgetown
Regulatory Context
Geothermal Permitting in Maryland
Geothermal heat pump installations in Maryland require specific permits and compliance with state regulations regarding well drilling, loop installation, and refrigerant handling. Contact your local building department for specific requirements in your area.
Geothermal systems from Harvey W. Hottel feature pipes lasting up to 50 years and maintenance-free heat exchangers with a 40-year lifespan, eliminating boiler and chiller maintenance requirements while reducing operational costs.
Yes, Harvey W. Hottel holds LEED-certified contracting credentials and specializes in sustainable commercial construction projects, supporting Leadership in Energy & Environmental Design certification for municipal buildings, office complexes, schools, and retail facilities.
Geothermal systems use electrically powered heat pumps to circulate water through underground pipes, delivering simultaneous heating and cooling with individual room control, reduced operational noise, lower maintenance expenses, no outdoor equipment, fully electric operation, zero air pollution, and significant energy cost savings.
Harvey W. Hottel has served the DC Metropolitan Area since 1945, establishing over 75 years of expertise as a premier provider of commercial geothermal heating and cooling solutions.
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If you need to reach Harvey W Hottel Inc directly: (240) 912-8900
Geothermal heat pump installations in Maryland may require drilling permits, environmental site assessments, and compliance with local well and thermal energy regulations. Requirements vary by jurisdiction and system type (vertical, horizontal, open-loop). Contact your local municipality, state energy office, or a licensed geothermal installer for specific permitting requirements in your area.
