In short, a QuietCool whole house fan is installed in the attic and pulls the air out of your home, ventilating it outside. This creates a negative pressure zone inside your living space, which will pull in fresh outdoor air.

QuietCool breezy indoor diagram of whole-house fan

Here's how it works: 

  1. Open a few windows any time it's cooler outside than inside, typically in the morning and evening.
  2. Turn your QuietCool fan on by setting the speed and timer
  3. QuietCool pulls in cool, fresh air from outside and expels hot, stale air out attic vents
  4. Your home has now been made cooler, healthier, and more comfortable


When your QuietCool Whole House Fan is turned on, the fan will pull the cooler outdoor air into your home, through your windows, across your living space, into the attic, and out the attic vents, replacing the hot, stale air. This helps cool the home and attic by up to 30 ºF or more.

Easy, Breezy, Beautiful Comfort

Where whole house fans are most effective is when a window or two is opened and the QuietCool whole house fan is turned on. This creates a cross breeze throughout your home, which can have your home feeling up to 30ºF cooler, without using an expensive-to-run AC unit!


A whole house fan often uses 90% less energy to operate than a traditional cooling system, cutting down on your Southern California cooling costs, and is significantly quieter during operation as well. On top of those savings, there are rebates and financing programs available to reduce the financial burden of installing the QuietCool ventilation equipment your California home needs.


What if you could keep your home cool all summer, without having to rely on your air conditioner 24/7? Ask Greencat about whole house fan installation! Get a quote by calling 323-720-3053 or get in touch here.

Don't cheat yourself out of savings and cooling

What Our Customers Are Saying About Greencat

  • Very hardworkers, professional and nice, did the work without any problem. Great customer service, neat. I would use their service again and would refer them to friends and family.

    - Temeka L.
  • Thank you so much. Service that was provided was done excellent. Very happy and satisfied.

    - Teresa P.
  • I was very happy to see and talk to the men who came to do the work on my attic. They were kind, respectful and quick. Answered all my questions and were efficiently working throughout the whole time. Very nice. I am so happy I had this done. Thank you!

    - Stephanie A.
  • I thank you for your service. Your guys did a great job!

    - Salvador C.
  • The service by Greencat is a great way to improve homes. The service received today by Victor and Jose was awesome. They were very pleasant, friendly and explained the process, and answered all our questions.

    - Rudy G.
  • Enrique and Edgardo arrived on time and were very very friendly, polite and respectful. They went right to work, did an amazing job and cleaned everything up and left it better than it was before!

    - Patricia G.
  • I love your company, Greencat. The workers are nice and hard working. They explained work in detail. They completed work nicely. They took care of my place. Thank you.

    - WooJoung K.
  • Greencat come to my home early and prepared to get the service done in a timely manner. They were professional, polite and did a great job prepping and cleaning up afterwards. I am thankful I decided to move forward with the services.

    - Marguerite H.
  • Greencat came to my home today and did a great job in my home. The techs were fast and professional. I'm excited for my home to be more cozy in the winter and fresher in the summer. Thank you!

    - Sagrario S.
  • The guys that came by today from Greencat were very professional, polite and fast. The work was clean and they answered any question I had. Thank you Greencat!

    - Erica S.
  • You guys did a wonderful job. Thank you guys for not leaving a mess. Also for being nice to us. Overall, I love you guys. Job is 10 out of 10 rating.

    - Jonathan C.
  • The techs that came in and did the installation did a really good job. Quick, clean, professional. It couldn't have been better. We'd recommend them to others!

    - Andres C.
  • Thank you for your service and professionalism. I appreciate the work you guys have done for us. Great service!

    - Alejandra B.
  • We are very pleased and thankful and also with your great staff in completing the job. Very nice, professional and respectful. 

    - Luis A.
  • The service was great. It was fast and easy. They arrived early and were kind. This service will allow our home to be cooler during the summer. It is great.

    - Leticia S.
  • Thank you so much! Our house runs super hot and cold in the winter. Your workers who came to gate were excellent. Within minutes the truck pulled up, both employees ready to do their job. Fast and efficient. Friendy and polite. Thank God for this program.

    - Jody L.
  • Greencat is a great company, the service they are giving us is perfect. The workers are very polite and out-going. They came and finished very fast. Just want want to thank them for taking their time to come out today. We really appreciate it.

    - Julio A.

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