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Emergency HVAC Contractors in Cotati, CA (2026)

Top 50 of 132 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

22 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 Cotati: Next Day Air & Heating, 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 Cotati at a glance

Top emergency HVAC contractors in Cotati at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Next Day Air & Heating675.0★ (499)Cotati24/7
2Ongaro & Sons664.9★ (1,222)Santa Rosa, 8 mi away24/7
3KC Home Services Plumbing, Heating & AC Repair664.9★ (827)Santa Rosa, 6 mi away24/7
4Ongaro & Sons654.9★ (538)Petaluma, 6 mi away24/7
5Henry Mechanical645.0★ (866)Windsor, 15 mi away24/7
6Bragg Home Services644.9★ (486)Santa Rosa, 11 mi away24/7
7Same Day Heating, Cooling, Plumbing634.9★ (531)Windsor, 15 mi away24/7
8Milano Mechanical625.0★ (82)Petaluma, 5 mi away24/7
9Northbay Comfort Inc.625.0★ (44)Rohnert Park, 2 mi away24/7
10The Duct Doctor615.0★ (84)Santa Rosa, 8 mi away24/7

Call an emergency HVAC contractor in Cotati 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 Cotati, 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 132 is on the HVAC contractors page.

  1. Ranked #1 in Cotati

    #1 Next Day Air & Heating

    Based in Cotati

    67/100CR Score

    Ranked #1 because of its Google rating and trade focus: 5.0★ from 499 Google reviews, listed on Google as “Heating contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 499 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    651 Portal St #6, Cotati, CA 94931
    View profile for Next Day Air & Heating(707) 600-6986

  2. #2 Ongaro & Sons

    Based in Santa Rosa, 8 mi away

    66/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.9★ from 1,222 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.9★ from 1,222 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    250 D St Suite 700B, Santa Rosa, CA 95404
    View profile for Ongaro & Sons(707) 908-9208

  4. #4 Ongaro & Sons

    Based in Petaluma, 6 mi away

    65/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.9★ from 538 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.9★ from 538 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    719 Southpoint Blvd, Petaluma, CA 94954
    View profile for Ongaro & Sons(707) 633-9499

  5. #5 Henry Mechanical

    Based in Windsor, 15 mi away

    64/100CR Score

    Ranked #5 because of its Google rating and trade focus: 5.0★ from 866 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 866 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7656 Bell Rd, Windsor, CA 95492
    View profile for Henry Mechanical(707) 585-1787

  6. #6 Bragg Home Services

    Based in Santa Rosa, 11 mi away

    64/100CR Score

    Ranked #6 because of its Google rating and trade focus: 4.9★ from 486 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.9★ from 486 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3345 Industrial Dr STE 16, Santa Rosa, CA 95403
    View profile for Bragg Home Services(707) 639-1746

  8. #8 Milano Mechanical

    Based in Petaluma, 5 mi away

    62/100CR Score

    Ranked #8 because of its Google rating and trade focus: 5.0★ from 82 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 82 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1317 Scott St, Petaluma, CA 94954
    View profile for Milano Mechanical(707) 778-9339

  9. #9 Northbay Comfort Inc.

    Based in Rohnert Park, 2 mi away

    62/100CR Score

    Ranked #9 because of its Google rating and trade focus: 5.0★ from 44 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 44 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5701 State Farm Dr #9, Rohnert Park, CA 94928
    View profile for Northbay Comfort Inc.(707) 723-6182

  10. #10 The Duct Doctor

    Based in Santa Rosa, 8 mi away

    61/100CR Score

    Ranked #10 because of its Google rating and trade focus: 5.0★ from 84 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 84 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    720 Blossom Way, Santa Rosa, CA 95401
    View profile for The Duct Doctor(707) 490-2722

  13. #13 Stout's Heating & AC, Inc

    Based in Santa Rosa, 10 mi away

    61/100CR Score

    Ranked #13 because of its Google rating and trade focus: 4.8★ from 99 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.8★ from 99 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    840 Piner Rd STE 14, Santa Rosa, CA 95403
    View profile for Stout's Heating & AC, Inc(707) 527-1504

  14. #14 Martin Electric and HVAC

    Based in Petaluma, 7 mi away

    60/100CR Score

    Ranked #14 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 30 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    Water St, Petaluma, CA 94952
    View profile for Martin Electric and HVAC(415) 699-4040

  15. #15 Severson Heating & Cooling

    Based in Sonoma, 11 mi away

    60/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.9★ from 46 Google reviews, listed on Google as “Heating contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.9★ from 46 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    19260 Wyatt Rd, Sonoma, CA 95476
    View profile for Severson Heating & Cooling(707) 938-3929

  18. #18 STAT Heating & Air

    Based in Larkfield-Wikiup, 8 mi away

    56/100CR Score

    Ranked #18 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 3 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for STAT Heating & Air(707) 755-0518

  19. #19 Climate Pro Services

    Based in Santa Rosa, 10 mi away

    56/100CR Score

    Ranked #19 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 3 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1780 Piner Rd, Santa Rosa, CA 95403
    View profile for Climate Pro Services(707) 581-1534

  20. #20 Excelsior Heating & Cooling

    Based in Sonoma, 14 mi away

    55/100CR Score

    Ranked #20 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 4 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    20549 Broadway, Sonoma, CA 95476
    View profile for Excelsior Heating & Cooling(707) 696-3053

  23. #23 CFM HVAC

    Based in Petaluma, 4 mi away

    52/100CR Score

    Ranked #23 because of its Google rating and trade focus: 5.0★ from 39 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 5.0★ from 39 Google reviews
    Address
    1364 N McDowell Blvd Suite 5, Petaluma, CA 94954
    View profile for CFM HVAC(707) 775-8117

  24. #24 Optemo Hydronics

    Based in Santa Rosa, 8 mi away

    49/100CR Score

    Ranked #24 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Heating contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 5.0★ from 18 Google reviews
    Address
    332 Carrillo St, Santa Rosa, CA 95401
    View profile for Optemo Hydronics(707) 292-3400

  25. #25 Elevated Comfort

    Based in Cotati

    49/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.9★ from 949 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.9★ from 949 Google reviews
    Hours
    Mon–Sat 7 AM–8 PM · Sun 8 AM–8 PM
    Address
    374 Blodgett St Suite 4, Cotati, CA 94931
    View profile for Elevated Comfort(707) 284-1039

Top 50 of 132 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 Cotati, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Zero Energy Associates485.0★ (9)8 mi
27Moore Home Heating Cooling & Plumbing Services474.7★ (1,764)9 mi
28Ross HVAC And Appliance Service474.9★ (404)2 mi
29Enviro Heating & Air Conditioning Inc464.9★ (343)2 mi
30Roy Mechanical Services Inc463.6★ (7)10 mi
31Icon Plumbing & Design464.0★ (4)25 mi
32Constantini's Heating & Air Conditioning Service465.0★ (6)13 mi
33John Owens Services, Inc.454.9★ (342)8 mi
34North HVAC Services, Inc Heating & Air Conditioning445.0★ (240)9 mi
35Elevated Comfort444.9★ (320)11 mi
36Peter Levi Plumbing, Heating, Cooling, Drains444.8★ (1,640)20 mi
37Hulbert Heating & Air Conditioning Inc445.0★ (54)In Cotati
38North End Plumbing, Heating & Air445.0★ (86)5 mi
39John Owens Services, Inc.434.9★ (88)5 mi
40Mountain House Mechanical435.0★ (52)2 mi
41Core Heating & Air Conditioning435.0★ (76)5 mi
42Wolf HVAC Inc.435.0★ (38)In Cotati
43Denny's Heating & Air Conditioning435.0★ (8)23 mi
44Gene Burch Plumbing Heating & Air434.9★ (588)20 mi
45Valley Comfort Heating and Air434.7★ (93)7 mi
46Kelly Plumbing & Heating434.9★ (308)17 mi
47Cherry Hill Plumbing & Heating425.0★ (65)7 mi
48Fuse HVAC & Appliance Repair Napa424.8★ (912)23 mi
49Grupé HVAC425.0★ (43)5 mi
50Adams Heating and Cooling425.0★ (33)5 mi

How we ranked emergency HVAC contractors in Cotati

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 Cotati: questions

Which HVAC contractors in Cotati are open 24/7?

22 on this list post 24/7 hours, including Next Day Air & Heating, Ongaro & Sons, KC Home Services Plumbing, Heating & AC Repair, Ongaro & Sons and Henry Mechanical.

Who is ranked #1 for emergency heating and cooling in Cotati, CA?

Next Day Air & Heating is #1, with a CR Score of 67 out of 100 on emergency weights.

How are emergency HVAC contractors in Cotati 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 Cotati

  1. October 2026: CR Scores recalculated for 132 hvac contractors serving Cotati.
  2. October 2026: 4 duplicate listings merged.

More emergency and heating and cooling pages