Skip to content
ContractorsRanked

Emergency HVAC Contractors in Littleton, CO (2026)

Top 50 of 895 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 Littleton: Elkhorn Heating, Air Conditioning, Plumbing & Electrical, 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 Littleton at a glance

Top emergency HVAC contractors in Littleton at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Elkhorn Heating, Air Conditioning, Plumbing & Electrical664.9★ (1,799)Littleton24/7
2Aim High HVAC655.0★ (760)Littleton24/7
3Plumbline Services644.7★ (9,085)Centennial, 10 mi away24/7
4Allen Service644.8★ (2,301)Denver, 5 mi away24/7
5Emporia Home Services645.0★ (535)Littleton24/7
6Priority Plumbing and Heating - Littleton644.8★ (963)Littleton24/7
7ROX Heating & Air644.9★ (732)Littleton24/7
8Heart Heating, Cooling, Plumbing & Electric644.8★ (2,877)Denver, 8 mi away24/7
9JC Mechanical Heating & Air Conditioning LLC644.8★ (586)Littleton24/7
10PS Cool Heat644.9★ (405)Littleton24/7

Call an emergency HVAC contractor in Littleton 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 Littleton, 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 895 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.

  2. #2 Aim High HVAC

    Based in Littleton

    65/100CR Score

    Ranked #2 because of its Google rating and trade focus: 5.0★ from 760 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 760 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    9933 Titan Park Cir, Littleton, CO 80125
    View profile for Aim High HVAC(720) 445-4497

  3. #3 Plumbline Services

    Based in Centennial, 10 mi away

    64/100CR Score

    Ranked #3 because of its Google rating and trade focus: 4.7★ from 9,085 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 9,085 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7000 S Potomac St, Centennial, CO 80112
    View profile for Plumbline Services(720) 853-4555

  4. #4 Allen Service

    Based in Denver, 5 mi away

    64/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.8★ from 2,301 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 2,301 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2101 S Platte River Dr unit b 2, Denver, CO 80223
    View profile for Allen Service(720) 806-2364

  7. #7 ROX Heating & Air

    Based in Littleton

    64/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.9★ from 732 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 732 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1745 Shea Center Dr 4th Floor, Littleton, CO 80129
    View profile for ROX Heating & Air(720) 468-0689

  10. #10 PS Cool Heat

    Based in Littleton

    64/100CR Score

    Ranked #10 because of its Google rating and trade focus: 4.9★ from 405 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 405 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4466 E Hunterwood Dr, Littleton, CO 80130
    View profile for PS Cool Heat(720) 285-0145

  15. #15 Premier Heating and Air

    Based in Greenwood Village, 7 mi away

    63/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.7★ from 1,502 Google reviews, listed on Google as “Heating contractor”.

    • 4.7★ from 1,502 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8000 E Prentice Ave STE C5, Greenwood Village, CO 80111
    View profile for Premier Heating and Air(720) 954-2224

  22. #22 Plumbline Services

    Based in Arvada, 13 mi away

    62/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.9★ from 1,917 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 1,917 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5980 W 59th Ave, Arvada, CO 80003
    View profile for Plumbline Services(303) 436-2525

Top 50 of 895 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 Littleton, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Nytech Heating, Cooling, and Plumbing625.0★ (2,828)18 mi
27Horizon Services Plumbing, Heating & Air - Englewood624.6★ (395)2 mi
28Ultimate Heating, Cooling, Plumbing & Electric624.8★ (1,215)11 mi
29Warm Welcome Heating, Cooling, & Plumbing625.0★ (90)In Littleton
30All A/C & Heating Solutions, Inc625.0★ (377)8 mi
31HomeSmart624.6★ (889)8 mi
32Apple Aire Heating & Cooling614.8★ (1,179)13 mi
33Behold Heating and Cooling | Denver HVAC615.0★ (371)10 mi
34ARS / Rescue Rooter614.5★ (3,114)14 mi
35Right Away Heating614.9★ (302)8 mi
36Roots Heating & Air615.0★ (266)8 mi
37AAA Service Plumbing, Heating & Electric614.8★ (12,904)11 mi
38Climate Masters Heating, Air & Electric614.9★ (72)In Littleton
39Cooper Heating & Cooling614.8★ (4,647)21 mi
401st Choice Pro Services614.9★ (969)15 mi
41United HVAC and Plumbing614.9★ (99)2 mi
42Upslope Heating and Cooling614.8★ (125)2 mi
434Seasons Heating, Air & Electric614.9★ (60)In Littleton
44Sveagle Plumbing, Heating, and Cooling614.8★ (496)10 mi
45The Bee Heat & AC614.9★ (466)11 mi
46One Nation Plumbing, Heating & Air615.0★ (259)9 mi
47Comfort Masters Heating, Air & Electric614.8★ (68)In Littleton
48Mighty Pine Heating & Air614.9★ (550)12 mi
49Doctor Fix-It Plumbing, Heating, Cooling & Electric614.7★ (3,903)5 mi
50AllSeason Heating, Air & Electric614.8★ (58)In Littleton

How we ranked emergency HVAC contractors in Littleton

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 Littleton: questions

Which HVAC contractors in Littleton are open 24/7?

25 on this list post 24/7 hours, including Elkhorn Heating, Air Conditioning, Plumbing & Electrical, Aim High HVAC, Plumbline Services, Allen Service and Emporia Home Services.

Who is ranked #1 for emergency heating and cooling in Littleton, CO?

Elkhorn Heating, Air Conditioning, Plumbing & Electrical is #1, with a CR Score of 66 out of 100 on emergency weights.

How are emergency HVAC contractors in Littleton 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?

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

Update log for Littleton

  1. October 2026: CR Scores recalculated for 895 hvac contractors serving Littleton.
  2. October 2026: 5 duplicate listings merged.

More emergency and heating and cooling pages