Frederick's Trusted HVAC Experts
Heating, cooling, and indoor air quality services — fast, honest, and done right the first time.
24/7 Emergency Service · Same-Day Appointments · Free Estimates
4.9 / 5.0
Based on 312 verified reviews
Call Us Now
(301) 555-010020+
Years in Business
5,000+
Homes Served
24/7
Emergency Service
100%
Satisfaction Guarantee
What We Do
Our HVAC Services
From annual tune-ups to full system replacements, Three Rivers HVAC covers all your heating and cooling needs in Frederick, MD.
Air Conditioning
Expert AC installation, repair, and maintenance for Frederick, MD homes and businesses.
Learn MoreHeating & Furnace
Reliable furnace installation, repair, and tune-ups to keep Frederick area homes warm all winter.
Learn MoreHeat Pumps
Energy-efficient heat pump installation and service for year-round comfort in the Frederick, MD area.
Learn MoreDuctwork & Ventilation
Professional duct installation, sealing, and cleaning for improved HVAC efficiency and air quality.
Learn MoreIndoor Air Quality
Air purifiers, humidifiers, and filtration systems for healthier indoor air in Frederick area homes.
Learn MoreEmergency HVAC Service
24/7 emergency HVAC repair throughout Frederick, MD — no heat or AC? We're on our way.
Learn MoreWhy Choose Us
Why Frederick Chooses Three Rivers HVAC
Three Rivers HVAC has served Frederick and the surrounding Maryland communities for over 20 years. From emergency repairs on the coldest January nights to full AC installations before summer, our NATE-certified technicians show up on time and get the job done.
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NATE-Certified Technicians
All techs hold North American Technician Excellence certification — the gold standard in HVAC.
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Upfront, Honest Pricing
We quote before we work. No surprise charges, no hidden fees.
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Same-Day Service Available
We'll get someone to your home the same day for most service calls.
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1-Year Parts & Labor Warranty
All repairs backed by our 1-year warranty on parts and labor.
Get a Free Estimate
We respond within 1 business hour.
Where We Work
Areas We Serve
Three Rivers HVAC serves Frederick and the surrounding Central Maryland region, including Frederick, Montgomery, Washington, and Carroll counties.
Got Questions
Frequently Asked Questions
Common questions about our HVAC services in Frederick, MD.
What areas do you serve?
We serve Frederick and the greater Central Maryland region including Hagerstown, Germantown, Gaithersburg, Rockville, Clarksburg, Middletown, Thurmont, Westminster, and Brunswick.
Do you offer 24/7 emergency service?
Yes. Our emergency line is available 24 hours a day, 7 days a week. We typically respond within 2 hours for heating and cooling emergencies throughout the Frederick area.
Are your technicians licensed and certified?
All of our technicians are NATE-certified, EPA 608 certified, and fully licensed in Maryland. We carry full liability insurance and workers' compensation coverage.
Do you offer financing?
Yes. We offer flexible financing options on new HVAC equipment installations. Ask about 0% interest financing for qualified customers.
What brands do you service?
We service all major brands including Carrier, Trane, Lennox, Bryant, Rheem, Goodman, York, and more. We are a certified Carrier dealer.
Ready to Schedule Service?
Same-day appointments available. 24/7 emergency service throughout Frederick, MD and Central Maryland.