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One Hour Air Conditioning & Heating® of GaithersburgHVAC contractor in Clarksburg, MD

One Hour Air Conditioning & Heating® of Gaithersburg is an HVAC contractor in Clarksburg, MD, ranked #7 of 617 HVAC contractors in Clarksburg and rated 4.8 from 302 Google reviews. Open 24 hours a day, 7 days a week.

Clarksburg, MDUpdated 0 paid placements in any rankingHow we rank

Call (301) 396-7481Website ↗

Key facts

Key facts about One Hour Air Conditioning & Heating® of Gaithersburg
Phone(301) 396-7481
Websiteonehourheatandair.com
HoursOpen 24 hours, 7 days a week
Google rating4.8 from 302 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves Clarksburg and 12 towns within 25 miles: Mount Rainier, Hyattsville, Bladensburg, Chillum, Riverdale Park, Cheverly, East Riverdale, College Park, Takoma Park, Langley Park, Landover and Adelphi.

Based in Clarksburg, MDView on map

Opening hours

Opening hours for One Hour Air Conditioning & Heating® of Gaithersburg
DayHours
MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours
SundayOpen 24 hours
  • Open 24/7
  • Open evenings — no
  • Open Saturdays
  • Open Sundays
  • Emergency service

Typical heating and cooling prices

Typical heating and cooling prices
JobLowTypicalHigh
AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range$3,887$5,978$8,073
Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range$2,823$4,814$6,896

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Compare nearby HVAC contractors

One Hour Air Conditioning & Heating® of Gaithersburg compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
One Hour Air Conditioning & Heating® of Gaithersburg (this business)—914.8 (302)—YesYes
Parker Pearce Service Experts#5914.8 (1,700)—YesYes18.8 mi
F.H. Furr Plumbing, Heating, Air Conditioning & Electrical#6914.7 (5,985)—YesYes14.2 mi
Meade's Heating and Air#8905.0 (1,428)—YesYes24.5 mi

See all 617 ranked HVAC contractors in Clarksburg

Questions about One Hour Air Conditioning & Heating® of Gaithersburg

How is One Hour Air Conditioning & Heating® of Gaithersburg ranked in Clarksburg?

One Hour Air Conditioning & Heating® of Gaithersburg is ranked #7 of 617 HVAC contractors in Clarksburg by CR Score, with 91 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity and profile completeness. No business can pay to change its rank.

What are One Hour Air Conditioning & Heating® of Gaithersburg’s hours?

One Hour Air Conditioning & Heating® of Gaithersburg is open 24 hours a day, 7 days a week. Its listed hours are Open 24 hours, 7 days a week. On Saturdays it is open Open 24 hours, and on Sundays Open 24 hours. Hours come from the business listing; holiday hours may differ.

What areas does One Hour Air Conditioning & Heating® of Gaithersburg serve?

Serves Clarksburg and 12 towns within 25 miles: Mount Rainier, Hyattsville, Bladensburg, Chillum, Riverdale Park, Cheverly, East Riverdale, College Park, Takoma Park, Langley Park, Landover and Adelphi. The list is based on the business's location and the usual service radius for heating and cooling. Confirm your address is covered when you call.

What do Google reviews say about One Hour Air Conditioning & Heating® of Gaithersburg?

One Hour Air Conditioning & Heating® of Gaithersburg has a rating of 4.8 from 302 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact One Hour Air Conditioning & Heating® of Gaithersburg?

Call One Hour Air Conditioning & Heating® of Gaithersburg on (301) 396-7481. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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