12 Best Furnace Replacement in Greeley, CO (2026) — 24/7 Picks
Why Greeley homeowners replace furnaces before winter hits
Greeley’s cold winters and large day‑night temperature swings push aging systems to failure, so many schedule replacements before heating demand peaks. Homeowners searching for best furnace replacement companies in Greeley, CO prioritize reliable emergency service, proper permits, and warranties to avoid mid‑season breakdowns.
Which Greeley pros actually offer round‑the‑clock service and long warranties?
| # | Provider | Score | Years | Best for | |
|---|---|---|---|---|---|
| 1 | MMcCormick Heating & Cooling | 84 | 4.9 (1,070+) | 20+ | ★ Highest Vouched ScoreNATE-Certified Installer |
Editorial: McCormick Heating & Cooling lists furnace replacement and full-system changeouts with named installer experience. Strengths:
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| 2 | OOrigin Plumbing • Heating • Cooling • Electrical | 84 | 5.0 (530+) | 92+ | High-Efficiency (95%+ AFUE) Upgrades |
Editorial: furnace replacement is a listed specialization with same-day and emergency options. Origin lists high-efficiency systems and rebate programs. Family-owned company with 90+ years serving Northern Colorado. Local winters make proper condensing-venting and combustion checks important in Greeley. Financing availability is noted for high-ticket changeouts. Strengths:
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| 3 | LLemons Heating & Cooling | 82 | 4.9 (375+) | 25+ | |
Editorial: Lemons Heating & Cooling lists furnace replacement and combined system changeouts. NATE-certified technicians are on staff, per their site. The company states they provide 24-hour emergency response for failed heating systems. Their site notes sizing calculations to determine appropriate unit size for each home. Greeley winters' cold snaps increase the value of timely combustion and safety checks. Strengths:
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| 4 | AA-1 Heating and Air Conditioning Services | 79 | 4.9 (330+) | ||
Editorial: A-1 Heating and Air Conditioning Services advertises emergency AC repair in Greeley. Google Maps lists 4.9/5.0 from 332 reviews. The business has a central Greeley address on N 23rd Ave. Greeley's hot summers increase demand for rapid AC response. Local map placement suggests regular nearby callouts. Strengths:
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| 5 | MMcCreery & Sun of Colorado | 79 | 4.9 (190+) | 52+ | Commercial Furnace Replacement |
Editorial: McCreery & Sun advertises 24-hour emergency HVAC response on its homepage. The company traces roots back to 1974, serving local homes fifty-plus years. Their tenure matches Greeley's cold winters and summer cooling demands. The website notes free estimates and financing options. Offerings include indoor air quality and commercial HVAC services. Strengths:
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| 6 | EEast to West Heating and Air Conditioning LLC | 76 | 4.9 (120+) | Honest Replace-vs-RepairFurnace + AC ChangeoutManufacturer-Authorized Installer | |
Editorial: Furnace replacement work is listed as a core service with documented Carrier installs. East to West HVAC notes Carrier factory-authorized dealer status. The company states same-day emergency furnace service for Northern Colorado winters. Financing options are advertised, including 0% interest on select equipment. Free estimates and flat-rate pricing are listed for local homeowners. Strengths:
Reviewers praise:
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| 7 | AAir Solutions Heating & Air Conditioning, LLC | 75 | 4.8 (490+) | ||
Editorial: Air Solutions appears in Google Maps' top-three local listings. The Google profile lists 490 customer reviews. Greeley's dry winters and seasonal wildfire smoke affect indoor-air needs locally. Their website notes heating, cooling, and indoor-air solutions, per their site. Strengths:
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| 8 | MMikes Heating and Air Conditioning, LLC | 73 | 5.0 (150+) | ||
Editorial: furnace replacement work emphasizes right-sized installs and on-site commissioning, per their website. Mike's Heating and Air Conditioning states they install standard and high-efficiency gas furnaces. Colorado's wide temperature swings make dependable, commissioned heating essential in Greeley homes. Google reviewers note quick same-day repairs and responsive emergency service across recent seasons. Strengths:
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| 9 | LLion Home Service Greeley | 71 | 4.6 (285+) | ||
Editorial: Camera and video duct inspection is listed, with before-and-after footage noted on site. Lion Home Service lists financing options and seasonal coupons. Lion Home Service advertises a 24/7 call center and same-day appointments. Local winters and spring dust in Greeley raise HVAC dust concerns for residents. Review excerpts mention prompt return visits and tidy job-site cleanup. Strengths:
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| 10 | DDe Leon Heating and Air llc | 71 | 5.0 (110+) | ||
Editorial: De Leon Heating and Air llc lists HVAC services on their website. Their Google profile shows 114 customer reviews. Located at 4429 W 16th Street Rd in Greeley for local dispatch. Greeley summers demand right-sized cooling to avoid short-cycling and humidity issues. Strengths:
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| 11 | AAir X-Treme, LLC | 67 | 4.8 (175+) | 28+ | Gas Furnace Replacement |
Editorial: Furnace replacement specialist with routine full-system installs and commercial experience. Air X-Treme lists Lennox equipment among stocked brands. Family-owned since 1998 and reporting thousands of local installations. Greeley's cold winters and high elevation make proper venting and sizing especially important. The company states free estimates, transparent pricing, and financing options. Strengths:
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| 12 | GGreeley Furnace Company | 63 | 4.6 (170+) | ||
Editorial: Greeley Furnace Company lists furnace diagnosis and repair services. The business maintains a storefront on 31st Avenue. Greeley's winter cold increases no-heat emergency demand for rapid diagnosis. Online ratings show steady local review volume across 172 entries. | |||||
Typical Furnace Replacement costs in Greeley, CO (2026)
Last updated
Estimated ranges for Greeley, CO. Actual cost varies with home size, equipment, and scope — always request a written quote for your job.
| Service | Typical range |
|---|---|
| Full gas furnace replacement (80% AFUE, installed) | $2,950–$6,350 |
| High-efficiency condensing furnace (95%+ AFUE, installed) | $4,400–$9,300 |
| Modulating / two-stage variable-speed (ECM) furnace upcharge | $585–$1,950 |
| Condensing-furnace venting + condensate conversion (80%->95% AFUE) | $585–$1,750 |
| Gas line / electrical / permit modification (changeout) | $145–$880 |
| Electric furnace / air-handler replacement (installed) | $1,950–$4,900 |
Nearby Colorado furnace replacement pricing: Arvada · Aurora · Boulder
See broader context: Furnace Replacement pricing in Colorado · Furnace Replacement pricing nationwide
How were these Greeley furnace replacements judged — and which metrics mattered most?
This guide evaluated 12 Greeley furnace replacement providers on review ratings, emergency response, warranties, certifications, and pricing signals. Review counts and advertised service terms carried the most weight, with Google review data and provider-disclosed warranties used to verify consistency.
- McCormick Heating & Cooling posts a 4.9/5.0 score and 1,070+ reviews, a high review volume per Google Maps data.
- Origin Plumbing • Heating • Cooling • Electrical lists 90+ years in business and a 5.0/5.0 Google rating.
- East to West Heating and Air Conditioning LLC is listed as a Carrier Authorized Dealer and notes flat-rate pricing.
- Lemons Heating & Cooling states NATE certification and free estimates on its website.
- Several providers — McCormick, Origin, Lemons, McCreery & Sun — report 24/7 emergency response availability.
Evaluation combined third-party review signals with provider-disclosed credentials and service terms to reflect both reputation and advertised capabilities.
How do I choose a furnace replacement contractor in Greeley?
- Verify contractor licensing per local records and ask for license numbers.
- Compare quoted warranties and labor coverage from multiple providers.
- Confirm emergency response windows and any advertised same-day or 24/7 service.
- Request itemized bids and check for flat-rate or financing options.
- Check recent Google reviews for installation and follow-up service trends.
5 furnace failures Greeley winters expose (and what homeowners report)
The most common furnace problems in Greeley arise from cold winters and large day‑to‑night temperature swings that push aging systems to fail. Homeowners seeking affordable furnace replacement services in Greeley, CO often report heat exchanger stress, short‑cycling, ignition faults, and duct leaks after sustained cold snaps.
- Heat exchanger cracks. Greeley's prolonged cold stretches force furnaces to run more hours, increasing thermal stress and raising the chance of cracked heat exchangers.
- Short‑cycling and rapid on/off cycling. Large day‑night temperature swings in Greeley make thermostats call for frequent starts, which wears controls and compressors faster than normal.
- Ignition and pilot failure. Heavy cold‑season demand in Greeley exposes weak ignition modules and pilot assemblies, causing intermittent no‑heat conditions during peak use.
- Duct leakage and reduced airflow. Repeated heating season expansion and contraction in Greeley homes loosens duct seams, lowering system efficiency and causing uneven heating.
- Control board and sensor faults. Continuous long runs during Greeley freezes can overheat electronic controls and sensors, leading to erratic operation or false fault codes.
Why Greeley’s seasonal swings and local permit rules change replacement timing
Greeley’s cold winters and large day‑to‑night temperature swings increase furnace runtime and failure risk. These climate stresses, combined with local permitting and equipment efficiency rules, push homeowners to schedule replacements earlier and choose certified installers who handle permits and high‑duty furnace installs.
Greeley’s long heating seasons and big temperature swings shorten component life. Evaluated providers note more heat exchanger and control failures in these conditions.
Local permit rules and the North DOE efficiency floor affect equipment selection and installation timing. Many evaluated providers list Carrier dealer status or NATE certification to meet those requirements.
Frequent cold snaps increase demand for emergency response. About half of shortlisted companies advertise emergency service availability.
Tighter local rules and efficiency standards make documented permits and compliant equipment essential. Look for installers who document permits and specify furnace type and efficiency ratings.
How quickly can a Greeley furnace be replaced, and who needs permits?
- How do I get a quote from these furnace replacement companies?
- Submit one request on this page and we send it to the vetted furnace replacement pros in Greeley, CO listed here. They send quotes back — no obligation.
- Typical furnace replacement pricing in Greeley, CO: what should I budget?
- Full gas furnace replacement typically runs $2,950–$6,350, and high-efficiency condensing furnace runs $4,400–$9,300 in Greeley, Colorado. See the Furnace Replacement pricing table on this page for the full per-service breakdown.
- Does Greeley require a city-issued permit for a furnace replacement?
- Yes. Greeley requires documented permits for furnace replacements when the job involves equipment changeouts or new gas work. Permit rules are managed locally because Colorado has no statewide HVAC license. Ask a prospective installer if they will pull the permit and include permit details on the estimate. Keep the permit number with your project records for inspections and warranty claims.
- Is a licensed HVAC contractor required to reconnect a gas furnace in Greeley?
- Answer: Gas reconnection typically must be performed by a contractor authorized under Greeley's local trade requirements. Colorado lacks a statewide HVAC license, so municipalities govern who can perform gas work. Confirm with the chosen provider that they meet Greeley's local qualifications and can produce permits and inspection approvals as part of the job documentation.
- How do I find a high-efficiency furnace specialist in Greeley?
- Look for installers who document manufacturer-dealer relationships, specify efficiency ratings, and list NATE or similar technician credentials. Many evaluated Greeley providers advertise dealer status and NATE certification. Ask for past install examples, warranty paperwork, and whether the quoted equipment meets North DOE efficiency requirements for the region.
- Can a furnace be replaced the same day in Greeley, and when is same-day realistic?
- Same-day replacement is possible but depends on inventory, permit timing, and job complexity. Simple like-for-like swaps with available stock can happen quickly. Full-system upgrades, permit processing, or difficult venting and ductwork usually require multiple days. Ask providers about same-day availability and whether they keep common furnace models on local trucks.
- When is the busiest season for furnace replacement in Greeley?
- Greeley is busiest before and during its cold snaps, when heating demand spikes. Homeowners often schedule replacements ahead of prolonged cold periods. Booking earlier in the fall avoids peak-season delays. Contact providers early to compare quotes and confirm timelines for permit-backed installations.
- Do I need a permit for gas-line modifications during a furnace swap in Greeley?
- Yes. Any gas-line modification tied to a furnace replacement usually requires a permit and inspection. Local jurisdiction enforces these requirements since Colorado does not issue a statewide HVAC license. Make sure the installer lists gas-line work on the permit and schedules the required inspection before final approval and equipment startup.
- Are there special rules for oil-to-gas furnace conversions in Greeley?
- Conversions often involve both mechanical and fuel-supply work and therefore need multiple permits and inspections. Fuel conversions can trigger additional permitting for venting, fuel lines, and combustion air. Discuss conversion scope with potential contractors and confirm who will coordinate permits and required inspections.
- Do commercial furnace replacements in Greeley follow different permit rules than residential jobs?
- Yes. Commercial projects commonly involve different permit tiers, larger inspections, and additional code compliance. Commercial work may also require separate mechanical or building permits and third‑party plan reviews. Ask for the contractor's experience with Greeley commercial permitting and proof of any relevant licenses or certifications.