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21 Years
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Emergency
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Trusted HVAC Installation, Repair & Maintenance in Littleton, CO
Duffey's Heating & Air Conditioning has been a trusted provider of HVAC solutions in the Denver metro area since 2005. With over 25 years of combined industry experience, our family-owned business specializes in furnace and air conditioning installation, repair, and maintenance. Our licensed and insured technicians serve Littleton, Highlands Ranch, Lakewood, Centennial, and surrounding communities, offering 24/7 emergency services and free estimates. We prioritize customer satisfaction through transparent pricing, upfront cost approvals, and the use of manufacturer-recommended parts. Our team carries extensive inventory for immediate repairs and provides air quality solutions to enhance home comfort.

Founded by Shawn Duffey, a Colorado native with a passion for HVAC systems since 1999, we combine technical expertise with personalized service. Our commitment to quality workmanship is backed by labor and parts guarantees, ensuring long-term system efficiency and reliability. We maintain strict adherence to industry standards while offering flexible scheduling, including after-hours appointments. Our reputation for cost-effective solutions and exceptional service has earned us numerous positive reviews from satisfied customers across multiple platforms.
Services
HVAC Installation Air Conditioning Repair Heating System Maintenance Emergency HVAC Service Air Quality Solutions
Details
  • Year established: 2005
Highlights and features
  • 25+ years combined HVAC industry experience with licensed technicians
  • Family-owned business offering transparent pricing and upfront approvals
  • 24/7 emergency service with same-day repair availability
  • Free estimates for all installation and major repair projects
  • Manufacturer-recommended parts with labor and parts guarantees
What people say
Fast, friendly service Saved thousands of dollars First call for annual visits Miraculous equipment repairs Effective emergency response
Services
HVAC Installation
We specialize in complete HVAC system installations for residential properties. Our technicians assess home size, layout, and climate needs to recommend optimal Amana and Goodman equipment. We handle all aspects of installation including system sizing, ductwork evaluation, and electrical connections. Our process ensures maximum efficiency and comfort while maintaining manufacturer warranty compliance.
Air Conditioning Repair
Our emergency AC repair service addresses all cooling system malfunctions. Technicians carry common replacement parts for immediate repairs and use diagnostic tools to identify complex issues. We provide upfront cost estimates before any work begins. Services include refrigerant leak repair, compressor troubleshooting, and electrical component replacement for both window and central AC units.
Heating System Maintenance
Preventive maintenance plans extend equipment lifespan and improve efficiency. Our technicians perform comprehensive inspections, cleaning, and adjustments on all furnace types. Services include filter replacement, burner cleaning, heat exchanger inspection, and thermostat calibration. Regular maintenance helps prevent unexpected breakdowns during peak usage periods.
Emergency HVAC Service
We offer urgent HVAC repair services outside regular business hours. Our on-call technicians respond to critical heating and cooling failures with no additional after-hours charges. Emergency services include weekend and holiday availability for complete system failures, gas leaks, or electrical malfunctions affecting home safety and comfort.
Air Quality Solutions
We improve indoor air quality through specialized equipment installations. Services include whole-home filtration systems, humidity control devices, and programmable thermostat upgrades. Our solutions address allergens, moisture control, and temperature regulation to create healthier living environments while improving HVAC system efficiency.
People
Shawn Duffey
Owner
Shawn Duffey founded the company in 2005 after 6 years of industry experience. A Colorado native with 3 children, he combines technical expertise with personal service. His hands-on approach ensures quality standards while maintaining family values in business operations. Shawn oversees all technical and customer service aspects.
Questions
What HVAC services do you offer?
We provide complete HVAC solutions including installation, repair, and maintenance for furnaces, air conditioners, and heating systems. Emergency service and air quality improvements are also available.
Do you offer emergency HVAC repair?
Yes, we provide 24/7 emergency HVAC repair services with no additional after-hours charges. Our technicians respond promptly to critical heating and cooling system failures.
What areas do you service?
We serve Littleton, Highlands Ranch, Lakewood, Centennial, and surrounding Denver metro areas. Our service territory covers both residential and commercial properties.
Do you offer financing options?
Yes, we offer financing options for major HVAC installations and repairs. Contact us for details about available payment plans and qualification requirements.
Are your technicians licensed and insured?
Yes, we are fully licensed and insured HVAC contractors. All technicians maintain current certifications and undergo regular training on the latest HVAC technologies and repair methods.
Do you provide free estimates?
Yes, we offer free estimates for all installation projects and major repair work. Our technicians provide transparent pricing with no hidden charges or unexpected fees.