AirScape Whole House Fan Facts

Where to start? We have put together our most often asked questions and queries to help you get started.

Why choose an AirScape Whole House Fan?

It is challenging to keep cool each summer, especially since we have seen record-breaking heat waves along with record-breaking energy costs.

We take a more subtle and sophisticated approach that in the end is more effective, more livable and more energy efficient. AirScape Whole House Fans are designed to run quietly throughout the evening and night. By circulating fresh cool air into the structure and pushing out heated air, you can maintain a comfortable environment while "pre-cooling" your home for the next day. In this way, you can significantly reduce or eliminate your need for A/C with an AirScape Whole House Fan.

Since a building will only give up its heat so fast, more airflow does not always equate to more cooling. AirScape units are sized and designed to deliver optimal airflow with minimum noise. Offering dual speeds, you can quickly remove built up heated air on high speed, then switch to low speed for whisper-quiet, steady cooling throughout the night.

How to choose the right AirScape fan?

Depending on the size and design of your home, the number of bedrooms, and your local climate, a whole house fan can help you achieve comfort cooling - or reduce or even eliminate the need for A/C. Our Sizing Calculator will help you find the right solution.

How many windows do I need to leave open? Which ones? How far?

Opening two or more windows halfway or wider is recommended to allow the fan to do its job. For general cooling, open windows far away from the fan to provide airflow to the whole house. Or, open windows strategically in the areas you want cooled. For example, if you want bedrooms to be the coolest then open windows in those bedrooms. Each house is different so we advise our customers to experiment and see what works best for you and your home.

Important Tips for Operating

  • Only use it when the outdoor air is cooler than your indoor air.
  • Make sure your A/C is off when you run the fan to avoid expensive energy bills.
  • We recommend running the whole house fan all night. The goal is to cool your entire house down, not just the air. It takes time to pull the heat out of the sheetrock, structure and contents of a structure. By ventilating throughout the night, the house starts the next day cooled to the core, which delays or eliminates the need for A/C. AirScape Whole House Fans are very quiet and energy efficient, so running on low speed through the night won't disturb you or your wallet.
  • Use high speed to 'kick-start' the cooling, and use low to run quietly through the night.
  • Never operate the unit without opening a window - this can create negative pressure in the house and cause dangerous back drafting with gas appliances.

How loud is the AirScape Whole House Fan?

In a real world setting, with the AirScape 1.7 on low speed, some effort is required just to hear it. In technical terms, the sound levels of our fans (on low speed) do not exceed 50 dBA, similar to that of a modern refrigerator. That being said, sound is very subjective and is highly affected by various environmental factors. Visit our AirScape Sound Lab to hear the fan in comparison to everyday noises. Low noise level is a top priority for our customers, and we are happy to share the real-world results. Take a moment to read some of the testimonials from satisfied AirScape users.

How difficult is it to install an AirScape?

AirScape Whole House Fans are designed to be easily installed by the average handyman. Our DIY Installation page provides a quick overview plus detailed resources, including downloads and videos. Expect it to take roughly four hours to complete depending on attic access and whether or not you need to run power.

What kind of electrical work is required?

The units run on regular household power, and draw just a couple of amps, so they can usually share a circuit with other devices. They come pre-wired with a standard plug, so wiring can be as easy as plugging the unit in.

There is also low-voltage wiring required for the switch or remote. In either case, a simple wiring diagram shows you how to connect to the unit -- no real electrical skills are required. If you are installing a wall switch, you will also need to run the low-voltage wiring to your switch location.

Why do I need to measure my attic ventilation?

The design of the fan relies on free air movement through adequate venting area. If there is not enough venting for attic air to escape, pressure will build up and the fan will not work as effectively. Our Attic Venting Calculator will help you determine the number of vents needed and the net free area.

My attic insulation goes well above the ceiling joists. How do I deal with this?

Raise the unit above the level of the insulation by building up a box out of 2x6s, 2x10s or whatever depth is required. Staple in some canvas-type material to cover the insulation around the discharge of the fans to avoid any disruption to the insulation.

Another option is the AirScape Acoustic Plenum Box which raises the whole house fan 12 inches above the ceiling joists. The box is made of 20 gauge thick galvanized sheet metal and lined with 1.5 inches of acoustical insulation.

If you look at the installation video, you will notice that we built up a box from 2x4s to raise the unit above the insulation in that house. Another tip is to line the inside of that box with some thin duct board (used on the inside of air ducts) to further absorb fan sound, making the unit even quieter.

Can AirScape fans be installed vertically?

Yes. The only caveat is, with the 1.0, be sure to position the unit in the "tall" position so that the door opens sideways, not up and down.

I'm not handy; who should I hire to install my unit?

We maintain a list of experienced AirScape Pro-Installers who have experience and knowledge in installing all models. Visit the Installers Page to find an installer near you. Our installation page also provides detailed resources that you can pass to your own installer to ensure everything gets done right.

How much should installation cost?

This can vary widely depending on what part of the country you are in, the local construction marketplace and the complexity of your installation. In our experience, most installers charge 4-6 hours for installation.

Do they require any maintenance?

In short no routine maintenance other than a seasonal cleaning and inspection. All Fan Units are triple tested and are sealed and permanently lubricated. We use industrial grade components and engineered design to provide years of worry free operation.

What's the warranty?

All AirScape Whole House Fans are backed by a three-year warranty on the unit and internal components. AirScape fans are robustly designed and provide years of dependable, natural cooling.

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