Whole House Fans

Whole house cooling using a whole house fan can substitute for an air conditioner most of the year in most climates.

Whole house fans combined with ceiling fans and other circulating fans provide acceptable summer comfort for many families, even in hot weather. In addition to whole house fans, the ducts of your central heating and cooling system can be modified to provide whole house cooling.


How Whole House Fans Work

The whole house fan pulls air in from open windows and exhausts it through the attic and roof. It provides good attic ventilation in addition to whole house cooling. With a whole house fan, you can open up the windows when the temperature outside is cooler than inside your home. The powerful fan pulls cool air in through the windows and up into the attic, pushing the hot air out of your attic through the vents. It cools your house and your attic at the same time..

We carry all Airscape models so that we will have the right fan for you. Let us work with you to match the best product to your needs.


ENERGY STAR qualified ventilation fans

Energy Star qualified ventilation fans that include lighting use 70% less energy on average than standard models, saving $120 in electricity costs over the life of the fan. Further the fans are more than 50% quieter than standard models according to Energy Star.


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Northern Colorado: 970-556-1249
Denver: 720-515-1250

Copyright 2014 Efficiency Matters, LLC All rights reserved


Contact Us

Efficiency Matters, LLC provides top quality Home Energy Audits and
Home Energy Ratings using the latest technology, detailed analysis,
and detection.


1800 E Lincoln Ave, Suite A Fort Collins, CO 80524

Northern Colorado: 970-556-1249
Denver: 720-515-1250



About Us

Our approach is to LOOK, LISTEN, EVALUATE, and UNDERSTAND.
These are the core principles that guide us through our everyday business.

Greg Fox - Owner
Greg has been involved with residential construction and green building for the last 10 years.
His passion is creating ideal situations for homeowners so they can safely and comfortably
enjoy their time spent at home. This is important since purchasing a home is on average the
largest investment you will make in your lifetime.

In his spare time he enjoys fishing, skiing, working on his own home, and in general, enjoying
what Colorado has to offer.


  • BPI Certified Building Analyst
  • RESNET Certified Energy Rater
  • LEED Green Associate
  • Colorado State University; Green Building Certificate
  • Northern Arizona University; B.S. in Environmental Sciences

Direct: 970-658-6540
Denver: 720-515-1250




Christopher Swetnam - Master Carpenter

Christopher’s carpentry experience began 14 years ago in college restoring a home in Flagstaff, Arizona. His experience progressed to historic restoration for the state of Colorado with court houses, high schools, and homesteads. He owned and operated a private contracting company that focused on remodel and new builds for private clients and has currently partnered with the Efficiency Matters team.

Christopher Swetnam resides in Fort Collins, Colorado with his wife and children. He was born in Flagstaff, Arizona where he received a b.s. from Northern Arizona University. He loves spending time with his family, white water rafting, telemark skiing, and hockey.

Direct: 970-980-3966



Brett Dowgin - Project Manager

Brett has over 5 years of experience working in residential construction with the last 4 years spent working in energy efficiency retrofits throughout Northern Colorado. During this time he has worked first hand to improve the efficiency of several hundred homes by applying the BPI standards to each and every project. He continues to learn and expand his skill set by seeking out new opportunities to train and gain new certifications.

Brett currently resides in Fort Collins with his wife and two dogs after moving here in 2010 from New Mexico by way of Alaska. Brett is originally from New Jersey and attended school at the University of Vermont where he earned his B.A. and was able to attend the Yestermorrow Design/Build School for their Design/Build and Passive Solar design courses. In his spare time he likes to enjoy everything Colorado has to offer and working on improvements on his own home.

Direct: 970-999-2410



What our customers are saying

At Efficiency Matters, your comfort and complete satisfaction is our top priority.
We would be glad to provide references so you can hear about us first hand.

Here are just a few examples of what our customers are saying.

Jim and Karin Higgins of Fort Collins, CO
In the fall Efficiency Matters did a major upgrade to the efficiency of our home. It turned out we had a home with many air leaks that were robbing us of needed heat in the winter and we were losing our cool in the summer. Efficiency Matters did a comprehensive analysis of the house and recommended several things that could be done to tighten the house and make our heating and cooling systems operate more efficiently. Recommendations were made considering the return on investment value. We have gone through a winter and half of a very hot summer and could not be more pleased. Our utility bills are roughly half what they used to be. Great job Efficiency Matters, I will recommend your services to anyone.

Ryan and Katy Kirkpatrick of Wellington, CO
"We would definitely recommend having an energy audit done by Efficiency Matters.
Greg was knowledgeable, professional and honest. We really appreciated that he told us about many improvements that we could do ourselves (and exactly how to do them), in addition to completing two larger improvements for us. We found the price of these “retrofits” reasonable and workmanship excellent! As first-time homeowners, this was a great investment for us and we are very happy with the company we chose. Thanks Greg!"

Gary Zook of Fort Collins, CO
I would describe Greg as honest, thoughtful, conscientious, thorough, and hard working. I've worked with many contractors through the years and while most of them do a decent job, a few of them really impress with both their skills and attitude. Greg is one of the best and I would not hesitate to recommend him for improving the energy efficiency of your home.
Read Full Testimonial

Scott Rogers of Windsor, CO
Greg, I wanted to give you a follow-up on how things are working. Since yesterday was such a hot day we really got to see how things were working. I must say we are VERY HAPPY with the results. Amy said the house stayed very cool until after 7:00PM. Then the A/C came on for only a few minutes. We used the Whole House Fan around 9:00 PM and it cooled the upstairs 2 degrees (making the whole house the same temp). We slept very comfortably last night. This is exactly the results we were hoping for. Thank you so much!



Efficiency Matters is proud to partner with the following companies
to bring you the best services and products for your home

Comfort RX