Best HVAC Companies in Longmont, Colorado

Compare HVAC contractors in Longmont, Colorado with websites, phone numbers, addresses, and company profiles. Updated August 2026.

1 HVAC company in Longmont · showing 11 nearby within 100 miles.

In Longmont

601 S Bowen St, Longmont, CO 80501
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Woelfel Appliance Repair offers Colorado homeowners appliance repair, HVAC installation and repair, and dryer‑vent cleaning with licensed, insured technicians. Transparent pricing, a $149 diagnostic fee (applied to repairs), fast turnarounds, Trane certification, maintenance plans, financing options, and a 5‑star Google rating emphasize reliable, local service for home owners everyday needs.

720-740-1919 se••••••@woelfelappliance.com woelfelappliance.com

Near Longmont

Closest available companies in nearby cities.

475 W 115th Ave. Suite 4A, Northglenn, CO 80234
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1‑800‑Plumber +Air serves the Front Range with licensed plumbing, HVAC, and 24/7 emergency technicians. Services include drain cleaning, water‑heater installation, gas‑line repair, AC maintenance, furnace repair, heat‑pump work, and water‑treatment units. Current promotions offer $25 off repairs, $100 off new water heaters, and $300 off water‑treatment units today for homeowners.

1-800-758-6237 we••••••@1800plumber.com 1800plumber.com
9970 Clark Drive, Northglenn, CO 80260
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SJS Heating & Cooling’s Terms & Conditions page offers a concise legal disclaimer, clarifying that the information is general and not legal advice. It outlines the purpose of T&C, the need for site‑specific clauses, and typical inclusions such as user eligibility, payment terms, warranties, intellectual‑property rights, account management, and details.

st••••••@sjsheatingandcooling.com sjsheatingandcooling.com
10783 Irma Dr., Northglenn, CO 80233
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Unique Heating & Air Conditioning offers NATE‑certified residential HVAC repair, installation, and maintenance in Northglenn and Denver. Services include furnaces, AC, heat pumps, duct cleaning, indoor‑air‑quality products, and water heaters. Company provides 24/7 emergency support, financing available today, 10‑year parts and labor warranty, and participates in Xcel Energy rebate programs.

Westminster, CO 80234
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With more than two decades in HVAC, S&N Mechanical offers cooling, heating, maintenance, indoor‑air‑quality and commercial solutions. Certified technicians provide customized installations and 24/7 emergency support. The company partners with Trane for furnaces and air conditioners, emphasizing quality guarantees and personalized service for residential and business clients throughout the region.

(720) 375-6742 in••••••@snmechanicalhvac.com snmechanicalhvac.com
9215 W 74th Ave, Arvada, CO 80005
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JK Plumbing, LLC earns a perfect 5‑star rating from seven Angi reviewers, highlighting prompt, professional service and transparent pricing. With 25 years of experience, the family‑owned firm offers residential and commercial plumbing, including pipe repair, water‑heater installation, and remodels. Emergency calls and free estimates are available for all project sizes.

303-467-9999 no••••••@techlineconstruction.info angi.com
6260 West 52nd Ave Unit 116, Arvada, CO 80002
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Lakeside Heating & Air Conditioning provides residential HVAC services in Arvada and the Denver metro, including AC repair, furnace maintenance, heat‑pump and mini‑split installation, and indoor‑air‑quality solutions. The company offers a maintenance plan, financing, rebates, and tax‑credit assistance, and carries Lennox and Daikin products, plus certified technicians and 50‑year history.

303-421-3572 in••••••@strategicamerica.com lakesideheating.com
5952 Sheridan Boulevard, Arvada, CO 80003
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Flawless Arvada Plumbers excels in residential leak detection, employing advanced, non‑invasive technology to locate hidden issues early. They also provide comprehensive sump pump maintenance, fixture installations, and precise pressure testing. Prompt response, clear communication, and meticulous workmanship aim to protect homes from water damage while conserving resources for homeowners today.

(720) 706-0322 th••••••@gmail.com americanhomequotes.com
4892 Marshall St, Wheat Ridge, CO 80033
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B&B Heating & Air Conditioning, operating since 1984, provides 24/7 HVAC service in Arvada, Broomfield, Wheat Ridge, Littleton, Cherry Hills, Englewood, Greenwood Village, Lonetree, and Lakewood. As a Carrier Factory Authorized dealer, its certified technicians handle repair, installation, heat pumps, ductless systems, indoor air quality, financing, and a $200 discount.

15720 W 6th Ave, Golden, CO 80401
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The Bee Heat & AC provides air conditioning maintenance in Centennial, CO, featuring a $99 A/C tune‑up, same‑day service guarantee, and a no‑breakdown promise. Licensed, insured technicians handle cooling, heating, boiler, heat‑pump, and indoor‑air‑quality work. Financing options, 24/7 live answering, and a 4.9‑star Google rating support reliable professional HVAC service.

(720) 263-1981 co••••••@thebeehvac.com thebeehvac.com
1154 S Lipan St, Denver, CO 80223
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Quality West Heating & Cooling, a family‑owned business serving Denver’s metro area since 2002, provides heating, cooling, boiler, ductless and heat‑pump services. Highlights include up to $18,000 heat‑pump rebates, $25 repair discount, $300 installation credit, financing options, five service guarantees, and strong customer praise for professionalism and efficiency, reliable expertise.

303-522-9597 ge••••••@2x.webp qualitywestservices.com
2540 West 65th Place, Denver, CO 80221
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AMD Plumbing and Excavation earns a 4.8‑star rating from six customers, highlighting reliable emergency plumbing, pipe repairs, and sewer‑excavation services. With a decade of experience, the firm offers warranties, credit‑card payment, and transparent pricing, earning praise for prompt, knowledgeable work and clear communication and friendly customer service throughout the project.

en••••••@crometrics.com homeadvisor.com