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Emergency HVAC Contractors in Mount Rainier, MD (2026)

Top 50 of 1,103 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

If you smell gas, leave the building now and call your gas utility or 911 from outside.

The short answer

  1. 1

    #1 for emergency heating and cooling in Mount Rainier: Len The Plumber Heating & Air, LLC, open 24/7.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

Top emergency HVAC contractors in Mount Rainier at a glance

Top emergency HVAC contractors in Mount Rainier at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Len The Plumber Heating & Air, LLC654.6★ (8,136)Silver Spring, 6 mi away24/7
2Michael & Son Services644.7★ (15,537)Alexandria, 15 mi away24/7
3United Air Temp634.8★ (1,306)Greenbelt, 6 mi away24/7
4CroppMetcalfe634.8★ (7,638)Fairfax, 15 mi away24/7
5Magnolia Plumbing, Heating & Cooling634.4★ (1,519)Washington, D.C., 2 mi away24/7
6F.H. Furr Plumbing, Heating, Air Conditioning & Electrical634.7★ (5,985)Rockville, 14 mi away24/7
7GAC Services634.9★ (6,908)Gaithersburg, 18 mi away24/7
8John C. Flood634.8★ (4,976)Alexandria, 15 mi away24/7
9United Air Temp634.8★ (1,775)Fort Washington, 9 mi away24/7
10One Hour Air Conditioning & Heating® of Gaithersburg634.8★ (302)Clarksburg, 1 mi away24/7

Call an emergency HVAC contractor in Mount Rainier now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency HVAC contractors in Mount Rainier, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 1,103 is on the HVAC contractors page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  3. #3 United Air Temp

    Based in Greenbelt, 6 mi away

    63/100CR Score

    Ranked #3 because of its Google rating and trade focus: 4.8★ from 1,306 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 1,306 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7255 Hanover Pkwy Ste A, Greenbelt, MD 20770
    View profile for United Air Temp(240) 713-3314

  4. #4 CroppMetcalfe

    Based in Fairfax, 15 mi away

    63/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.8★ from 7,638 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 7,638 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8421 Hilltop Rd, Fairfax, VA 22031
    View profile for CroppMetcalfe(703) 420-5030

  7. #7 GAC Services

    Based in Gaithersburg, 18 mi away

    63/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.9★ from 6,908 Google reviews, listed on Google as “Heating contractor”.

    • 4.9★ from 6,908 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    227 E Deer Park Dr, Gaithersburg, MD 20877
    View profile for GAC Services(301) 202-1641

  8. #8 John C. Flood

    Based in Alexandria, 15 mi away

    63/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.8★ from 4,976 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 4,976 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6430 General Green Way, Alexandria, VA 22312
    View profile for John C. Flood(571) 605-7008

  9. #9 United Air Temp

    Based in Fort Washington, 9 mi away

    63/100CR Score

    Ranked #9 because of its Google rating and trade focus: 4.8★ from 1,775 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 1,775 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5620 St Barnabas Rd Ste 240, Fort Washington, MD 20744
    View profile for United Air Temp(240) 342-3956

  16. #16 Caffi Services

    Based in Alexandria, 10 mi away

    62/100CR Score

    Ranked #16 because of its Google rating and trade focus: 4.9★ from 508 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 508 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1313 Powhatan St, Alexandria, VA 22314
    View profile for Caffi Services(703) 962-6052

  22. #22 Thomas E Clark Inc

    Based in Silver Spring, 7 mi away

    61/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.8★ from 299 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 299 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2412 Linden Ln, Silver Spring, MD 20910
    View profile for Thomas E Clark Inc(301) 608-0550

  24. #24 United Air Temp

    Based in Alexandria, 15 mi away

    61/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.8★ from 1,318 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 1,318 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6094 Franconia Rd # B, Alexandria, VA 22310
    View profile for United Air Temp(703) 762-2488

  25. #25 JDL HVAC & Plumbing Services

    Based in Laurel, 12 mi away

    61/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.8★ from 678 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 678 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    14300 Cherry Lane Ct Ste 116, Laurel, MD 20707
    View profile for JDL HVAC & Plumbing Services

Top 50 of 1,103 HVAC contractors by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

HVAC contractors in Mount Rainier, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26AG Services – Electrical, Air Conditioning, Heating & Plumbing614.9★ (440)11 mi
27ARS / Rescue Rooter614.4★ (3,510)15 mi
28Vito Services614.7★ (1,351)14 mi
29EzGreen Air duct And Dryer Vent Cleaning614.9★ (130)5 mi
30Michael & Son Services614.7★ (419)9 mi
31Presidential, Inc.614.9★ (1,701)19 mi
32C.D. Shanahan's HVAC, Plumbing, Electrical & Remodeling LLC614.9★ (966)17 mi
33Michael Bonsby HVAC, Plumbing & Electrical614.8★ (2,083)19 mi
34Parker Pearce Service Experts614.8★ (1,700)19 mi
35Beltway Air Conditioning, Heating & Plumbing614.9★ (2,167)21 mi
36Hugee Corporation604.6★ (89)2 mi
37United Air Temp604.4★ (4,301)18 mi
38TRINITY PRO SERVICES604.7★ (257)8 mi
39JC & JC HVAC604.7★ (503)11 mi
40Aire Serv of Prince Georges County604.8★ (176)7 mi
41Cycle Heating and Cooling, LLC604.9★ (77)4 mi
42Staton Heating, Cooling & Plumbing604.9★ (2,904)24 mi
43C&V Home Services Inc604.9★ (114)7 mi
44ACCURATE604.9★ (208)11 mi
45Cardinal Plumbing Heating & Air Inc604.9★ (2,958)25 mi
46Cyprus Air Heating, Cooling and Fireplaces604.3★ (2,189)15 mi
47Environmental Systems Associates604.9★ (658)17 mi
48Nelson's HVAC, LLC604.9★ (627)17 mi
49A Action Home Services604.9★ (326)14 mi
50EzGreen Air Duct And Dryer Vent Cleaning604.9★ (90)7 mi

How we ranked emergency HVAC contractors in Mount Rainier

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed from
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency HVAC contractors in Mount Rainier: questions

Which HVAC contractors in Mount Rainier are open 24/7?

25 on this list post 24/7 hours, including Len The Plumber Heating & Air, LLC, Michael & Son Services, United Air Temp, CroppMetcalfe and Magnolia Plumbing, Heating & Cooling.

Who is ranked #1 for emergency heating and cooling in Mount Rainier, MD?

Len The Plumber Heating & Air, LLC is #1, with a CR Score of 65 out of 100 on emergency weights.

How are emergency HVAC contractors in Mount Rainier ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the HVAC contractor arrives?

If you smell gas, leave the building now and call your gas utility or 911 from outside.

How many emergency HVAC contractors here list a phone number?

24 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Mount Rainier

  1. October 2026: CR Scores recalculated for 1,103 hvac contractors serving Mount Rainier.
  2. October 2026: 11 duplicate listings merged.

More emergency and heating and cooling pages