Mannix Heating and Cooling- Gaithersburg
Mannix Heating and Cooling- Gaithersburg is a HVAC provider serving Gaithersburg, MD. Rated 4.9★ with 163 Google reviews. See services, review signals, and request a quote.
HVACGaithersburg, MD
On this page
Company overview
- TradeHVAC
- Service areaGaithersburg, MD
- Google rating4.9★ (163 reviews)
- Phone(301) 260-6000
- Address7824 Beechcraft Ave, Gaithersburg, MD 20879, USA
Services offered
- installation
- repair
- inspection
Photos
Photos from Mannix Heating and Cooling- Gaithersburg
What customers say
“I have been a delighted Mannix customer for years. They are expert, knowledgeable, prompt and neat. Today, Silvio the Mannix technician quickly resolved a heating and ventilation problem and changed a…”
“Erick Aviles of Mannix went the extra mile to get my heater working during this frigid cold weather. He fit me into the schedule and we are so grateful. I highly recommend Mannix. They installed both …”
“Mannix service technicians are always excellent. I have been buying twice/year service package and it’s very good deal and never been disappointed. Today Mr. Rember Bonilla checked our two heat pumps …”
“Mannix’s Keith Hellin has been servicing our HVAC system for several years. He always gets the job done extremely well. Yesterday he went above and beyond, dealing with ice and snow and extreme temper…”
“We’ve been using Mannix for our HVAC maintenance needs for well over a decade and today’s experience confirmed our decision. The technician, Silvio, was prompt, professional, professional, knowledgeab…”
Key highlights
Strengths
- Highly rated (4.9★ average)
- Large review volume (163 reviews)
Things to ask
- Confirm availability for your area and timeline
- Ask about warranty terms on parts and labor
- Request a written estimate before work begins
- Ask about payment plans or financing
Explore nearby research
Frequently Asked Questions
What services does Mannix Heating and Cooling- Gaithersburg offer?
Mannix Heating and Cooling- Gaithersburg provides: installation, repair, inspection. They serve residential and commercial customers in Gaithersburg, MD.
What is Mannix Heating and Cooling- Gaithersburg's rating?
Mannix Heating and Cooling- Gaithersburg has a 4.9 out of 5 star rating based on 163 Google reviews.
Is this company licensed in Maryland?
All listed providers have a verified Maryland contractor license at time of publication. You can verify on the Maryland Department of Labor — Board of Heating, Ventilation, Air-Conditioning, and Refrigeration Contractors (HVACR Board) lookup at https://www.dllr.state.md.us/cgi-bin/ElectronicLicensing/OP_Search/OP_search.cgi?calling_app=HVAC.
Does Mannix Heating and Cooling- Gaithersburg offer emergency service?
Contact them directly to ask about emergency availability and after-hours service.
How do I request a quote?
Use the CTA below to submit your ZIP. You can message this company alongside two or three other local pros for easy comparison.
Licensing verified 2026-04-23. Reviews refreshed 2026-04-23.
Licensing data: Maryland Department of Labor — Board of Heating, Ventilation, Air-Conditioning, and Refrigeration Contractors (HVACR Board) · Company data: verified business records + Google Business profile
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