For homes up to 3500 sq. ft. the AirScape 2.5e delivers the airflow required for larger homes while maintaining the low-noise profile that AirScape is famous for. In fact, this is our quietest unit. An exceptionally robust industrial-grade fan, isolated through a noise-deadening ducted design puts the 2.5e in a class all by itself. Plus, the 2.5e is straightforward to install, and comes with a high-flow grill that minimizes noise and looks as unobtrusive as it sounds.

Excellent energy efficiency

At full power, the AirScape 2.5e uses just 197 watts of power, a small fraction of the energy used by an A/C compressor. While the ducted design requires more energy than our drop-in models, the 2.5e is still very efficient. If you are comparison shopping, you'll see that the 2.5e uses significantly less power than competitive whole house fans in terms of CFM/Watt. In fact, the AirScape 2.5e qualifies for energy rebates in a number of states and municipalities. Please check with your local utility for more information and check our rebates page.

High power, incredibly low noise

While all AirScape fans deliver high power and low noise, the 2.5e sets a new standard for quiet. The unique ducted design and powerful 22-inch fan work together to raise the bar in terms of performance/noise ratio. The amount of air this unit moves is impressive, and the noise level at which it does this is even more impressive. You really need to feel it and hear it to believe it.

Industrial build quality

Exceptional engineering and build quality is the foundation of all AirScape units, with heavy industrial-grade components rarely seen in the consumer market.

Two-speed operation

On high speed, you get over 2500 CFM to cool your house down fast without sounding like a jet engine. Set to low, the 2.5e operates at a quiet 46 dBA @ 1m -- so all you'll hear is air whooshing quietly through the cube core grill. The unit is controlled via a wall-mounted switch (included) or optional wireless remote.

A common problem with traditional whole house fans is air leakage between the attic and living spaces. Properly installed, the AirScape 2.5e takes care of this problem with an automatic, industrial-grade damper. When the fan is off, your attic is sealed tight. So attic air NEVER leaks into your living space, and warm air never condenses in your attic.

Premium Cube Core grill

The AirScape 2.5e comes with a premium high-flow grill that minimizes air noise through the grill. These high-performance grills look great too, so your system looks as unobtrusive as it sounds.

Easy installation

The AirScape 2.5e mounts between standard joists, either 16-inch or 24-inch centers using pre-drilled tabs. It is specifically designed to fit through its own mounting hole, so no other attic access is required. Equipped with a standard plug and an available remote control, the unit can be installed with plug and play simplicity. See our ducted installation page for complete details.

Maintenance-free operation

The AirScape 2.5e employs an industrial fan unit which is sealed and never requires lubrication. The only other moving parts are the twin heavy-duty door actuators which are tested to 45,000 cycles. All mechanical and electrical parts are easily accessible for servicing or replacement.

3-year warranty backed by professional support

Backed by our professional technical support, our units are guaranteed for 3 years. If you have a problem with your unit - or just a question - you'll get prompt, knowledgeable responses.

Fan	22 in industrial-grade fan
Airflow	2536 CFM (high)
Energy use	197 Watts (high)
Efficiency	12.9 CFM/Watt
Acoustical (hi/low)	51/46 dBA @ 1m
Attic seal	air-tight with industrial-grade damper
Insulation	insulated dampers provide R-10 concerned about R-Values? read more
Control	dual SPST Decora switch; optional wireless remote
Grille	high-flow, aluminum cube-core (white)
Installation	drops in between 16 in or 24 in O/C joists
Rough opening	14.5 in x 22.5 in
Required roof venting	5 sq. ft. net-free [learn more]
Grille size	16 in x 24 in (outer)
Damper box (L x W x H)	20.25 in X 27 in X 14.25 in
Shipping weight	75 lbs
Electrical requirements	120 VAC, 60hz, 3 Amps
Warranty	three years

	AirScape Full Line Brochure
	2.5e WHF Brochure
	2.5e WHF Installation & Operation Manual (IOM)
	How to change speeds on the 2.5e WHF
	Technical Support Blog Entries