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HVAC Installation, Repair, and Replacement in Littleton, CO

Reliable Heating & Cooling For Your Home

When the heat cuts out on a cold night or your air conditioner struggles through a summer afternoon, life at home can get uncomfortable quickly. If you are facing an older system or sudden breakdown, you need clear answers about repair and new HVAC installation, not pressure.

Service Experts Denver is a local HVAC installation company serving homeowners in and around Littleton. Our team works with furnaces, air conditioners, and complete heating and cooling systems throughout their life, from the first install to eventual replacement and the repairs in between. We focus on straightforward recommendations that fit your home and budget.

Whether you already know you want a new system or you are just starting to compare repair and replacement, we are here to walk you through your options in plain language and help you feel confident about your next step.

Call (720) 794-5771 or contact us online to schedule an HVAC appointment with our team.

Your Local HVAC Company

Choosing an HVAC company is not only about equipment. It is also about who you trust in your home and who understands the climate and homes in this area. 

  • Regional Climate Expertise: We understand how the specific weather patterns and elevation of the Front Range impact HVAC performance, ensuring your system is calibrated for local conditions.
  • Residential Specialists: Our team is deeply familiar with the unique needs of both historic homes and new construction in Littleton, allowing us to provide highly relevant, home-specific advice.
  • Data-Driven Recommendations: We base our solutions on your home’s actual behavior—analyzing insulation, layout, and ductwork—rather than relying solely on generic equipment labels.
  • Stress-Free Service Experience: We ensure every visit is predictable and professional, utilizing clearly marked vehicles and providing comprehensive reviews of our findings before any work starts.
  • Commitment to Property Care: Our technicians prioritize the cleanliness of your home by protecting floors and surfaces during the job and performing a thorough cleanup before leaving.
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  • Up to $1,500 Off New HVAC System

    Lease or purchase a new system for winter.

    Offer valid on qualifying new system installations. Discount varies based on system type: $800 off Single stage systems, mini-split system, boilers, $1,000 off 2 stage systems, or $1,500 off Modulating systems. Nov 4, 2026 - Dec 31, 2026
  • $79 Drain Cleaning

    Regularly $235. Reduce buildup on your pipes, Help avoid major plumbing repairs, Maintain a clean home.

    Offer not valid on prior purchases and may not be combined with other offers outside of membership discounts. Valid for one drain only. Must have an accessible ground level clean out. Nov 4, 2026 - Dec 31, 2026
  • No Payments Until 2027

    With any new HVAC, Indoor Air Quality, Water Heater or Water Treatment Service Experts Advantage Program lease agreement, we will make your payments for the first 6 months.

    Valid on new Advantage Program lease agreements from 7/1/26 to 12/31/26. Customer owes $0 for the first six months; regular monthly lease payments begin thereafter. Early termination during promotional period will result in charges for elapsed months. See your full Advantage Program Lease Agreement for complete terms and conditions, including total lease costs and payment schedule. Nov 3, 2026 - Dec 31, 2026
  • NEW HVAC SYSTEM as Low as $155/Month

    NO money down; Brand new, high-efficiency equipment; installation, regular preventative maintenance, all repairs (parts & labor), and air filters INCLUDED.

    Offer not valid on prior purchases and may not be combined with other offers. Advantage pricing applies to specific equipment. Call for details. Some exclusions apply. See the terms and conditions within the Service Experts Advantage Program Lease Agreement for additional information.
  • 10% Off Any Product or Service for Active Duty, Retired, and Veteran Military Personnel

    It’s our way of thanking you for your courage, dedication, and sacrifice to protect our freedom. All work is performed by licensed experts and backed by our Service Experts Guarantee.

    Offer not valid on prior purchases and may not be combined with other offers.
  • Members Exclusive: 15% Off Services and Repairs

    As a Maintenance+ member, you automatically receive discounts on all services and repairs.

    See your signed Maintenance+ Membership agreement for full terms and conditions.
  • Earn Up to $1,800 in Rebates When You Purchase or Lease a Qualifying Lennox System

    System rebate requires the purchase of a Lennox indoor unit, an outdoor unit and a qualifying thermostat. System add-ons do not qualify for an individual rebate and cannot be combined with individual offers. Rebate offer valid from 9/19/26 until 12/4/26 and must be installed by 12/11/26 and submit claims by 1/10/27. Rebate is paid in the form of a Lennox prepaid Mastercard.

    All rebate information found at https://www.lennox.com/residential/buyers-guide/offers-and-savings/promotions/. Equipment varies by Service Experts location, call your local Center for more details. Sep 19, 2026 - Dec 4, 2026
  • Member Exclusive: Extra $200 Off Installation When Upgraded to an Advantage Lease Program

    Receive an additional $200 off installation cost of new system lease

    Available to new and existing active Maintenance+ members. Customers who execute a qualifying lease agreement for a new HVAC, Indoor Air Quality, Water Heater, or Water Treatment system by December 31, 2026, and complete installation by January 7, 2027 will receive a $200 credit applied to the installation portion of the transaction. Offer cannot be combined with other installation credits unless expressly stated. Offer may be modified, suspended, or withdrawn as permitted by law. Nov 4, 2026 - Dec 31, 2026
  • Member Exclusive: $0 Diagnostic Fee with Paid Repair

    Waived diagnostic fee for Maintenance+ members. Valid for new and active members.

    The $0 fee applies only when recommended repair is completed and paid at time of service. Promotion valid for service visits for new and existing Maintenance+ members. See your signed Maintenance+ Membership agreement for full terms and conditions.
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