Yes, Done’s electricians and HVAC technicians install attic fans — both traditional powered exhaust fans and whole-house fans — to help reduce heat buildup in your attic and lower the load on your air conditioning system. At Denver’s altitude and with the region’s intense summer sun, attic temperatures can soar well above 140°F on a hot afternoon, and moving that heat out efficiently makes a measurable difference in your home’s comfort and energy use.

Why Attic Ventilation Matters at High Altitude

Colorado’s high-altitude sunshine is intense. The UV index on a clear Denver summer day rivals locations much farther south, and that radiant energy bakes roofing materials and drives heat through the attic floor into your living space. Without adequate ventilation, that trapped heat forces your AC system to work harder and run longer to maintain comfortable indoor temperatures.

A powered attic fan exhausts superheated air and draws in cooler outside air through soffit vents, keeping attic temperatures closer to ambient outdoor temperature rather than 40–60°F above it. This reduces thermal transfer into conditioned living space and can extend the life of your roofing materials, which degrade faster under sustained extreme heat.

Types of Attic Fans Done Can Install

  • Electric gable or roof-mounted exhaust fans: Wired to your electrical panel and often thermostat-controlled, these activate automatically when attic temps exceed a set threshold.
  • Solar-powered attic fans: No wiring to the panel required — a rooftop solar panel powers the fan during peak daylight hours, which conveniently aligns with peak heat buildup.
  • Whole-house fans: Mounted in the ceiling between the living area and attic, these pull indoor air upward and exhaust it through attic vents, rapidly cooling the home during mild evenings — a smart strategy on Colorado’s cool summer nights when outdoor temps drop significantly after sunset.

The Installation Process

For a standard electric attic fan, the process involves selecting the right CFM (cubic-feet-per-minute) capacity for your attic’s square footage, cutting an opening in the roof or gable, securing the fan housing, and running a dedicated circuit from your electrical panel. A thermostat or humidistat control is wired in so the fan operates automatically. The entire installation typically takes a few hours for a straightforward setup.

Whole-house fans require a bit more planning — the ceiling opening must be correctly sized and framed, and adequate attic venting must exist to allow the high volume of exhaust air to escape. Done’s team evaluates your attic’s existing vent area before recommending a fan size to make sure the system performs as intended and doesn’t create negative pressure problems.

Attic Fans and Your Air Conditioning System

A well-ventilated attic is one of the most cost-effective ways to reduce cooling costs on the Front Range. When attic temperatures are kept in check, the ductwork running through that space stays cooler, which means conditioned air loses less energy before it reaches your rooms. This is especially important for homes with duct systems routed through unconditioned attic space — a very common configuration in Denver-area construction.

If you’re also due for AC maintenance or are considering a cooling system upgrade, combining that work with an attic fan installation is an efficient use of a single service visit. Our team can evaluate both at the same time.

What to Consider Before Installing

Powered attic fans work best when your attic has adequate intake venting — typically through soffit vents — so the fan is exhausting air that can be continuously replaced. An undersized intake area causes the fan to work against negative pressure, which can actually pull conditioned air out of your living space through gaps in the ceiling. Done checks this balance as part of the installation assessment.

Ready to take some heat off your AC system this summer? Learn more about how proper ventilation ties into overall indoor air quality and AC maintenance, or contact Done to schedule an attic fan installation assessment.