16 Commercial HVAC Contractors in Danbury, CT

3.9 avg rating
2,471 total reviews2 offer 24/7 service
Need emergency service? 6 HVAC providers in Danbury offer 24/7 availability

Top-Rated Commercial HVAC Contractors in Danbury

#1

Service Stars

4.9(1,475 reviews)
Highly Rated

Nearly all 1,475 reviews carry five-star ratings, with technicians Mike, Frank, Kevin, Justin, Michael, Dave, and Mario appearing by name across multiple…

43C Beaver Brook Rd, Danbury, CT 06810
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#2

Hefferon Heating & Cooling LLC

4.9(404 reviews)
24/7 Highly Rated

Reviewers repeatedly emphasize prompt arrival and thorough communication, with 3 of 5 sampled reviews naming specific technicians, Ernie, his crew, and team…

37A Padanaram Rd, Danbury, CT 06811
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#3

R & R Heating and Cooling

4.9(221 reviews)
Highly Rated

221 reviews yield a 4.9 average rating, with Ramon mentioned by name in four reviews for diagnostic skill and same-day response. Repeat customers note Goldy in…

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All Commercial HVAC Contractors (16 total)

Total Comfort Inc

4.6(117)

All eight published reviews award five stars, with four reviewers specifically mentioning same-day or…

44 Kenosia Ave, Danbury, CT 06810
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Reilly Mechanical HVAC

5.0(58)

All 58 reviewer comments award five stars, with multiple mentions of same-day or prompt response. Customer…

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Berkshire Refrigeration Service

4.6(61)

Of seven detailed reviewers, six award perfect 5-star ratings. Three reviewers specifically mention same-day…

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Two Maids

5.0(40)

All 40 client reviews award five stars, with recurring themes of technician dependability, thoroughness, and…

18 Great Plain Rd Suite 203, Danbury, CT 06810
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Hoffman Energy

3.5(47)

Of 47 reviews totaling a 3.5-star average, two detailed negative reviews cite alleged billing discrepancies…

170 White St, Danbury, CT 06810
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Hood Services 24 | Commercial Restaurant Hood Repair

4.7(12)
24/7

4 positive reviews specifically mention same-day or weekend service availability. 2 reviewers name individual…

12c Irving Pl, Danbury, CT 06810
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Mulvaney Mechanical Inc

4.2(10)

Eight of ten reviewers award 4 or 5 stars, with multiple five-star reviews citing the company's…

4 Christopher Columbus Ave, Danbury, CT 06810
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Ortiz Refrigeration AC & Heating

5.0(5)

All five reviews award five stars, with clients consistently praising quick response times, fair pricing, and…

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Testa Refrigeration LLC

4.0(8)

Two of eight reviewers describe Testa as responsive and cost-effective, noting same-day arrival during…

1 Lily Dr, Danbury, CT 06811
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Landmark Air Systems, Inc.

2.6(12)

Across 12 customer reviews averaging 2.6 stars, seven clients assigned one-star ratings citing similar…

36-B Kenosia Ave, Danbury, CT 06810
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Kim Industries Inc.

5.0(1)

All reviewer feedback awards five stars, with one client specifically identifying six team members by name…

34 Mill Plain Rd, Danbury, CT 06811
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The Otto Company

0.0
17 Beaver Brook Rd, Danbury, CT 06810
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ETP Heating & Cooling

0.0
100 Mill Plain Rd 3rd floor, Danbury, CT 06811
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Commercial HVAC Costs in Danbury

Commercial system pricing in Danbury. Actual costs vary significantly by building size and system type. Request a site-specific quote.

ServiceLowAverageHigh
Annual maintenance (per rooftop unit)
Quarterly inspections
$550$1,100$2,200
Annual contract (small business, < 5K sqft)
$1,100$2,750$5,500
Annual contract (mid-size, 5K-25K sqft)
$3,850$7,150$11,000
Basic rooftop unit replacement
$7,150$11,000$16,500
Small business full system (< 5K sqft)
$8,800$17,600$27,500
Mid-size building (5K-25K sqft)
$27,500$55,000$88,000
Operating cost (per sqft annually)
Utility + maintenance
$2$4$7

Prices reflect continental metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.

Commercial HVAC in Danbury, CT: What to Expect

Danbury's position inland from Connecticut's coast shapes its commercial climate demands distinctly. Winter temperatures dropping to 16 F with reliable snowfall from December through March push heating systems hard for six months or more, while summer peaks near 85 F with lower humidity still require reliable cooling. The city's eighteen active commercial HVAC contractors maintain an average rating of 3.8 across over two thousand reviews, reflecting a market where equipment runs longer and under more stress than in milder coastal areas nearby. This combination of prolonged heating seasons and variable summer demands makes responsive commercial HVAC service essential for Danbury businesses.

Pricing transparency matters when evaluating commercial HVAC investments. Among documented service categories, commercial system replacement typically ranges from $8,500 to $25,000 depending on building size and equipment specifications, while preventive maintenance contracts generally fall between $400 and $1,800 annually. These figures represent actual market rates contractors in the Danbury area publish, allowing business owners to budget accordingly. Connecticut law adds another layer of accountability: all legitimate contractors must hold a Class 1 Heating, Cooling and Piping contractor license from the state Department of Consumer Protection, verifying their qualification to install or repair commercial systems.

Customer feedback from Danbury area contractors reveals consistent priorities worth examining. Multiple reviews highlight technicians who arrive on time and explain technical issues clearly before recommending solutions, with particular praise for thorough sizing assessments that prevent oversizing waste. Several business owners note that contractors offering 24/7 emergency response become preferred vendors after single after-hours calls resolve unexpected shutdowns. Response reliability and clear communication emerge as the differentiating factors beyond basic technical competency.

Frequently Asked Questions

Commercial HVAC in Danbury varies widely by building size. Annual maintenance contracts run $1,000-$10,000+ depending on unit count and service frequency. Rooftop unit replacement starts around $6,500-$15,000, small business systems (<5K sqft) run $8,000-$25,000, and mid-size buildings cost $25,000-$80,000 installed.

All HVAC Contractors in Danbury, CT

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