Top 7 HVAC companies in Jefferson, Colorado

Jefferson County spans IECC zones 4B-7 and sits in a dry, heating-dominant climate with 5,900 heating degree days against only 800 cooling degree days. Winter design temperature reaches 3 °F while summer peaks at 92 °F, and large diurnal swings plus altitude require careful equipment sizing. Natural gas remains the primary heating fuel, though heat pumps perform adequately with backup.

The shortlist

Companies are ranked by a Bayesian-adjusted rating: a company's star rating is pulled toward the national mean until it has enough reviews to stand on its own, so a 5.0 from four customers does not outrank a 4.9 from two hundred. Small tie-breakers apply for a public website, for being listed as an HVAC specialist rather than a general contractor, and for published 24/7 availability. This is a shortlist built from public listing data, not a review of work performed.

Scots Heating and AC Company Lakewood

Scots Heating and AC Company Lakewood operates from 7586 W Jewell Ave, Denver, CO 80232 and lists the phone number (720) 575-8196. Its 38 reviews produced a raw 5.0 that the model adjusted downward to 4.896, still above the national mean of 4.764, because 38 reviews give moderate but not decisive weight. The general-contractor listing and lack of published 24/7 hours suggest the firm handles a broad range of work rather than emergency HVAC calls alone. These numbers cannot reveal how the company performs on high-altitude derating or whether its technicians hold any local mechanical certificates.

Finn Heating and AC

Finn Heating and AC lists 12191 W 64th Ave, Arvada, CO 80004 and the phone number (720) 605-7167. Thirty-four reviews at a raw 5.0 yielded an adjusted score of 4.889 after the Bayesian pull toward 4.764. The firm appears under the general-contractor heading and does not advertise 24/7 service. The modest review count keeps the adjusted figure close to the raw rating, yet the adjustment still moves the score downward. Public data give no information on how the company handles evaporative-cooling options common in this dry climate.

Jeffco Mechanical, Inc.

Jeffco Mechanical, Inc. lists its address as 2900 W Acres Dr Unit 75, Steamboat Springs, CO 80487 and the phone number (970) 367-2846. Seven reviews at a raw 5.0 produced an adjusted rating of 4.809, pulled down from the raw score toward the national mean of 4.764. The general-contractor category and absence of 24/7 availability indicate the firm may schedule work rather than respond to after-hours breakdowns. With so few reviews the adjustment remains noticeable, and the numbers supply no detail on whether the company routinely works in Jefferson County or only travels for larger projects.

Johnson's Heating and Cooling

Johnson's Heating and Cooling operates from 16645 Mt Vernon Rd, Golden, CO 80401 and lists the phone number (720) 327-9214. Its single review at a raw 5.0 received an adjusted score of 4.772, lowered toward 4.764, yet the published 24/7 availability supplied an extra tie-breaker that preserved its fourth-place position. The general-contractor listing suggests the firm may combine HVAC with other mechanical trades. One review supplies almost no information about consistency on dual-fuel or cold-climate heat-pump installations.

Colorado Eco-Mechanical

Colorado Eco-Mechanical lists 6510 W 91st Ave, Westminster, CO 80031 and the phone number (720) 303-5569. Sixty reviews produced a raw 4.8 that the model adjusted upward to 4.788, moving closer to the national mean of 4.764 because the larger sample size carries more statistical weight. The general-contractor category and lack of 24/7 hours point to scheduled rather than emergency work. The numbers cannot indicate whether the firm routinely registers for Colorado Home Energy Rebates or passes through the required contractor discount.

Pace & Sons Mechanical

Pace & Sons Mechanical lists 140 Park Ave, Pine, CO 80470 and the phone number (720) 898-4700. Thirty-nine reviews at a raw 4.6 produced an adjusted rating of 4.671 after a slight upward movement toward the national mean of 4.764. The general-contractor listing and absence of 24/7 availability suggest the firm focuses on planned installations and maintenance. The review count is large enough to limit the size of the adjustment, yet the numbers still give no visibility into how the company sizes equipment for the county's 3 °F winter design temperature.

Lakewood AC & Furnace Repair

Lakewood AC & Furnace Repair lists 6900 W Jefferson Ave Ste 125, Lakewood, CO 80235 and the phone number (303) 708-1043. Two reviews at a raw 3.0 produced an adjusted score of 4.654 after a substantial upward pull toward the national mean of 4.764. The general-contractor category and lack of 24/7 hours indicate limited emergency coverage. With only two reviews the adjustment is large, and the numbers supply almost no information about whether the firm can meet current permit or rebate documentation standards.

How to choose

Verify that any contractor under consideration appears on the current Colorado Energy Office registered-contractor list before discussing heat-pump options. Request written confirmation that equipment will be sized with altitude derating and that the firm will pull the required local mechanical permit. Compare the published review count against the adjusted rating rather than the raw star score alone.

Cost

Modeled typical full-system cost stands at $10,350, with a published range of $9,300 to $11,400. Invoiced averages for 2025 reached $17,151, with the upper quartile at $25,373. Labor is listed at $120 per hour and permit fees range from $150 to $500. Both sources appear in the data; the invoiced average sits noticeably above the modeled typical price.

Climate

Jefferson County falls mainly in IECC zone 5B with a dry moisture regime. Heating degree days total 5,900 against only 800 cooling degree days, producing a heating-leaning mixed load. Winter design temperature is 3 °F and summer design reaches 92 °F. Very dry air year-round makes humidification common, while altitude requires derating on both combustion and heat-pump equipment. Evaporative cooling remains viable, yet peak service demand occurs in winter.

Licensing and permits

Colorado has no state HVAC contractor licensing board. Licensing and permitting are handled entirely by individual city and county building departments. The City and County of Denver, for example, issues Mechanical Supervisor Certificates and Mechanical Contractor licenses through its Community Planning and Development department. Insurance requirements vary by jurisdiction because no statewide HVAC insurance minimum exists. Permits are therefore required or waived at the local level.

Incentives

The Colorado Home Energy Rebates program remains limited but active, offering up to $8,000 for heat pumps. A state tax credit of $1,000 for air-source or $2,000 for ground-source units is available only through CEO-registered contractors, who must pass through at least 33 percent as a customer discount. Utility rebates from Xcel Energy and others range from $700 to $2,500. No federal residential HVAC tax credits apply in 2026. Homeowners must therefore confirm contractor registration before any heat-pump discussion.

Local review volume remains modest outside the top two firms, and every listed company operates under the general-contractor heading. Homeowners should confirm current local permit rules and CEO registration directly with each contractor before signing an agreement.