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HVAC Companies in Boulder, CO — Free Estimates
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As of July 2026, RatingsNearMe ranks 13 hvac companies in Boulder, CO by the RNM Score — a 0–100 rating built from Google ratings, review volume, sentiment, and profile completeness. The top-ranked is Welzig Heating, Air, Plumbing & Electric with a 4.9-star rating from 1,345 Google reviews and an RNM Score of 87/100. Also in the top tier: Allen Service and Sanders & Johnson Heating, Cooling and Plumbing. The average rating across all listed hvac companies in Boulder is 4.7 stars from 756 reviews per business on average.
HVAC service in Boulder: $75–$150/hr for repairs; full system replacement $4,000–$12,000 depending on size and efficiency.
Rankings updated July 4, 2026 · RNM Score = ratings (35%), review volume (30%), sentiment (20%), completeness (10%), availability (5%) · Not paid placement.
Best Overall
Sanders & Johnson Heating, Cooling and Plumbing
They offer comprehensive heating, cooling, and plumbing services with a strong reputation for quality work in Boulder.
Most Reviewed
Allen Service
A large number of reviews reflects consistent customer satisfaction and trust in their service.
Consider getting multiple quotes to compare pricing and ensure the contractor is licensed and insured; also check for any seasonal promotions or maintenance plans.
Local Market Snapshot
13
Businesses listed
4.7★
Avg rating
756
Avg reviews
Jul 4, 2026
Last updated
Top Rated HVAC Companies
4.9 stars from 1,345 Google reviews make this Boulder HVAC company highly trusted.
1831 Boston Ave, Longmont, CO 80501, USATrusted by thousands, this Boulder HVAC company holds a 4.8-star rating.
101 S Link Ln, Fort Collins, CO 80524, USATrusted by hundreds of locals with a stellar 4.8-star average rating.
7100 Broadway #7K, Denver, CO 80221, USAHVAC Companies Rankings in Boulder, CO
| # | Business | Rating | Reviews |
|---|---|---|---|
| #1 | Welzig Heating, Air, Plumbing & Electric1831 Boston Ave, Longmont, CO 80501, USA | 4.9★ | 1,345 |
| #2 | Allen Service101 S Link Ln, Fort Collins, CO 80524, USA | 4.8★ | 6,563 |
| #3 | Sanders & Johnson Heating, Cooling and Plumbing7100 Broadway #7K, Denver, CO 80221, USA | 4.8★ | 756 |
| #4 | Prime Performance Mechanical5471 Pinelands Dr, Longmont, CO 80504, USA | 4.8★ | 64 |
| #5 | DNI Heating, AC, Refrigeration, Plumbing & Electrical3990 Broadway Suite 110, Boulder, CO 80314, USA | 4.8★ | 53 |
| #6 | Timberline Mechanical System LLC3195 Sterling Cir #150, Boulder, CO 80301, USA | 3.7★ | 45 |
| #7 | Meyers Heating & Air Conditioning1750 55th St #D, Boulder, CO 80301, USA | 4.8★ | 619 |
| #8 | Comfort Zone Heating & Air Conditioning2833 28th St, Boulder, CO 80301, USA | 4.9★ | 91 |
| #9 | Elemental Comfort Systems1200 Diamond Cir #G, Lafayette, CO 80026, USA | 4.9★ | 65 |
| #10 | Allied Heating & Air Conditioning663 30th St, Boulder, CO 80303, USA | 4.7★ | 63 |
Ranked by verified ratings & review volume · Data from Google Business listings · Updated July 2026
All HVAC Companies in Boulder
Boulder's top-rated HVAC provider with 4.8 stars from 64 Google reviews.
5471 Pinelands Dr, Longmont, CO 80504, USA
Boulder’s top-rated HVAC choice with 4.8 stars from 53 Google reviews.
3990 Broadway Suite 110, Boulder, CO 80314, USA
With a 3.7-star rating from 45 reviews, service feedback is generally mixed.
3195 Sterling Cir #150, Boulder, CO 80301, USA
Trusted by hundreds of locals with a stellar 4.8-star rating.
1750 55th St #D, Boulder, CO 80301, USA
91 Google reviews give this Boulder HVAC company an exceptional 4.9-star rating.
2833 28th St, Boulder, CO 80301, USA
Rated 4.9 stars from 65 Google reviews for reliable HVAC service in Boulder.
1200 Diamond Cir #G, Lafayette, CO 80026, USA
Trusted by 63 locals with a strong 4.7-star average rating.
663 30th St, Boulder, CO 80303, USA
Rated 4.8 stars from 62 reviews, this Boulder HVAC company is highly trusted.
2005 Pearl St, Boulder, CO 80302, USA
Rated 4.9 stars from 54 reviews, consistently praised for quality service.
625 S Broadway, Boulder, CO 80305, USA
Rated 4.9 stars from 54 reviews, a top choice for HVAC in Boulder.
3970 Broadway, Boulder, CO 80304, USA
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HVAC Companies in Boulder, CO — Compared
| # | Business | RNM Score | Rating | Reviews |
|---|---|---|---|---|
| 1 | Welzig Heating, Air, Plumbing & Electric | 87/100 | 4.9 ★ | 1,345 |
| 2 | Allen Service | 85/100 | 4.8 ★ | 6,563 |
| 3 | Sanders & Johnson Heating, Cooling and Plumbing | 85/100 | 4.8 ★ | 756 |
| 4 | Prime Performance Mechanical | 78/100 | 4.8 ★ | 64 |
| 5 | DNI Heating, AC, Refrigeration, Plumbing & Electrical | 77/100 | 4.8 ★ | 53 |
| 6 | Timberline Mechanical System LLC | 57/100 | 3.7 ★ | 45 |
| 7 | Meyers Heating & Air Conditioning | 85/100 | 4.8 ★ | 619 |
| 8 | Comfort Zone Heating & Air Conditioning | 81/100 | 4.9 ★ | 91 |
| 9 | Elemental Comfort Systems | 79/100 | 4.9 ★ | 65 |
| 10 | Allied Heating & Air Conditioning | 76/100 | 4.7 ★ | 63 |
Ranked by RatingsNearMe Score · ratings (35%), review volume (30%), sentiment (20%), completeness (10%), availability (5%) · July 2026
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Frequently Asked Questions — HVAC Companies in Boulder
How do I find the best hvac companies in Boulder?
Look for businesses with 4.5+ stars, 50+ verified reviews, proper licensing and insurance, and transparent pricing. The top-ranked hvac companies in Boulder on this page are scored by our algorithm that weighs ratings, review count, and profile completeness.
Are hvac companies in Boulder licensed and insured?
Licensing requirements vary by trade and state. For most home service contractors, CO requires both a state license and liability insurance. Always ask any contractor for proof of current insurance and a copy of their license number before work begins — you can verify most licenses on your state licensing board's website.
How much do hvac companies charge in Boulder, CO?
Prices vary by scope, materials, and contractor experience. Use the free quote form on this page to request estimates from multiple local pros simultaneously. Getting 3+ quotes is the single most effective way to avoid overpaying.
What should I look for when hiring a hvac companies in Boulder?
Verify licensing and insurance, read recent reviews on multiple platforms, ask for a written estimate before work starts, confirm they pull permits when required, and check references from recent local projects. Featured businesses on this page are ranked by verified ratings and review quality.
How are the hvac companies on this page ranked?
Rankings use a transparent algorithm: star rating (35%), review volume (30%), customer sentiment (20%), profile completeness (10%), and availability (5%). Featured Partner listings have paid for enhanced visibility but must still earn their position through real customer reviews — sponsored listings are clearly labeled.
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How Rankings Work on This Page
Every hvac companies on RatingsNearMe is scored transparently: star rating (35%), review volume (30%), customer sentiment (20%), profile completeness (10%), and availability (5%). Businesses labeled exclusive or premium are Featured Partners — they have paid for enhanced visibility but must still rank through real customer reviews. We cap sponsored boosts so bad businesses can never buy the top spot.
Editorial notice: Ratings are based on publicly available data from Google Business listings. Consumers should independently verify licensing, insurance, and credentials before hiring any service provider. Last updated: July 4, 2026.
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