AirScape Sierra

The world’s most advanced whole house fan system

The AirScape Sierra applies advanced energy-efficiency and noise-reduction strategies to cool off your home with clean, fresh outside air. You can reduce your cooling costs up to 50-90%, substantially reducing your home energy footprint while improving indoor air quality, bedroom sleeping conditions and overall enjoyment of your home.

See how it works

AirScape 24" fan
AirScape 24" fan
AirScape Powered Airlock™ Damper Box - Sierra 3400/4300/5300
AirScape Powered Airlock™ Damper Box - Sierra 3400/4300/5300
AirScape Powered Airlock™ Damper Box - Sierra 3200
AirScape Powered Airlock™ Damper Box - Sierra 3200
AirScape Powered Airlock™ damper doors
AirScape Powered Airlock™ damper doors
AirScape wall controller and optional remote controls
AirScape wall controller and optional remote controls
AirScape cube core aluminium grille
AirScape cube core aluminium grille
AirScape Sierra duct section
AirScape Sierra duct section
AirScape 20" Fan
AirScape 20" Fan
AirScape 24" fan
AirScape 24" fan

AirScape Sierra

Our flagship model featuring precision motorized damper doors with R-49 insulation. It comes in four airflow capacities and two grill sizes. Ships in 1-2 days. How to choose.

Model
Sierra 3200 WHF

Regular price $1,579.00 Sale

A compact design that fits between 16” O/C joists for smaller attics in houses up to 2000. sq ft. Airflow rated at 4424 Q-CFM™ (3253 CFM HVI-916 - CA Title 24 airflow)**. Available optional Wireless Remote Kit.

Our least powerful 24" fan for homes up to 2500 sq. ft. Airflow rated at 4644 Q-CFM™ (3440 CFM HVI-916 - CA Title 24 airflow)**. Available optional Wireless Remote Kit.

Our midsize unit for homes up to 3500 sq. ft. Airflow rated at 5967 Q-CFM™ (4324 CFM HVI-916 - CA Title 24 airflow)**. Available optional Wireless Remote Kit.

Our most powerful unit for homes up to 4500 sq. ft. Airflow rated at 7196 Q-CFM™ (5350 CFM HVI-916 - CA Title 24 airflow)**. Available optional Wireless Remote Kit.

Full Specifications
AirScape 24" fan
AirScape 24" fan
AirScape Powered Airlock™ Damper Box - Sierra 3400/4300/5300
AirScape Powered Airlock™ Damper Box - Sierra 3400/4300/5300
AirScape Powered Airlock™ Damper Box - Sierra 3200
AirScape Powered Airlock™ Damper Box - Sierra 3200
AirScape Powered Airlock™ damper doors
AirScape Powered Airlock™ damper doors
AirScape wall controller and optional remote controls
AirScape wall controller and optional remote controls
AirScape cube core aluminium grille
AirScape cube core aluminium grille
AirScape Sierra duct section
AirScape Sierra duct section
AirScape 20" Fan
AirScape 20" Fan
AirScape 24" fan
AirScape 24" fan

AirScape Sierra 3200 Spec Sheet

What's in the box

This unit comes in three boxes actually, and includes:

3200 fan unit Powered AirLock damper box 20" diameter accoustic ducting Digital Touch Controller 16" x 24" grille CAT5 cabling and other installation accessories

HVI-916 (CA Title 24) Airflow and Efficiency for 3200

Fan Speed
Setting
Airflow
(CFM)
Energy Use
(Watts)
Efficiency
(CFM per Watt)
1 723 18 40.2
2 1388 42 33.0
3 1853 75 24.7
4 2212 116 19.1
5 2532 162 15.6
6 2834 215 13.2
7 3075 272 11.3
8 3123 287 10.9
9 3178 304 10.5
10 3253 321 10.1
** Q-CFM™ is NOT HVI-916 'as-installed' airflow. Please see our blog for info

Features for 3200

  • Q-CFM™ Max Airflow**: 4424 CFM
  • HVI-916 Max Airflow (CA Title 24): 3253 CFM
  • For Square Footage: up to 2000 sq. ft. (under ideal conditions)
  • Fan: 20" industrial grade
  • Motor: 321W ultra-high efficiency, electronically commutated (ECM)
  • Sound Level: 36 - 60 dBA (min - max)
  • Attic Seal: Airtight with industrial grade dampers
  • Insulation: Automatic insulated R-49 dampers
  • Required Attic Venting: 4.3 sq. ft. min net free area (6 recommended)
  • Recommended Attic Height/Clearance: 48" (contact us for help with tight attic spaces)
  • Controls: Low-voltage hardwired switch with timer, optional wireless remote
  • Grille: High-flow, white aluminum cube-core
  • Installation: Drops in between 16" or 24" O/C joists
  • Electrical: 10 ft. factory-installed power cord, 120 VAC, 60hz
  • Warranty: 3 Years

Dimensions and Weight for 3200

  • Grille Outer Dimensions: 16" x 24"
  • Rough Opening: 14.5" x 22.5"
  • Unit Size: 29.25" x 19.25" x 16.25" (Damper Unit)
  • Shipping Weight: 90 lbs (3 boxes total)

AirScape Sierra 3400 Spec Sheet

What's in the box

This unit comes in three boxes actually, and includes:

3400 fan unit Powered AirLock damper box 20" diameter accoustic ducting Digital Touch Controller 24.5" x 28.5" grille CAT5 cabling and other installation accessories

HVI-916 (CA Title 24) Airflow and Efficiency for 3400

Fan Speed
Setting
Airflow
(CFM)
Energy Use
(Watts)
Efficiency
(CFM per Watt)
1 723 17 42.5
2 1352 33 41.0
3 1775 55 32.3
4 2082 80 26.0
5 2415 110 22.0
6 2671 142 18.8
7 2896 179 16.2
8 3105 217 14.3
9 3282 259 12.7
10 3440 298 11.5
** Q-CFM™ is NOT HVI-916 'as-installed' airflow. Please see our blog for info

Features for 3400

  • Q-CFM™ Max Airflow**: 4644 CFM
  • HVI-916 Max Airflow (CA Title 24): 3440 CFM
  • For Square Footage: up to 2500 sq. ft. (under ideal conditions)
  • Fan: 24" industrial grade
  • Motor: 298W ultra-high efficiency, electronically commutated (ECM)
  • Sound Level: 36 - 52 dBA (min - max)
  • Attic Seal: Airtight with industrial grade dampers
  • Insulation: Automatic insulated R-49 dampers
  • Required Attic Venting: 4.6 sq.ft. min net free area (7 recommended)
  • Recommended Attic Height/Clearance: 48" (contact us for help with tight attic spaces)
  • Controls: Low-voltage hardwired switch with timer, optional wireless remote
  • Grille: High-flow, white aluminum cube-core
  • Installation: Compatible on 16" or 24" O/C joists
  • Electrical: 10 ft. factory-installed power cord, 120 VAC, 60hz
  • Warranty: 3 Years

Dimensions and Weight for 3400

  • Grille Outer Dimensions: 24.5" × 28.5"
  • Rough Opening: 22.5" × 26. 5"
  • Unit Size: 33.25" x 26.25 x 19.25" (Fully Assembled Damper Unit)
  • Shipping Weight: 110 lbs (3 boxes total)

AirScape Sierra 4300 Spec Sheet

What's in the box

This unit comes in three boxes actually, and includes:

4300 fan unit Powered AirLock damper box 20" diameter accoustic ducting Digital Touch Controller 24.5" x 28.5" grille CAT5 cabling and other installation accessories

HVI-916 (CA Title 24) Airflow and Efficiency for 4300

Fan Speed
Setting
Airflow
(CFM)
Energy Use
(Watts)
Efficiency
(CFM per Watt)
1 765 18 42.5
2 1568 43 36.5
3 2105 75 28.1
4 2544 117 21.7
5 2918 167 17.5
6 3267 224 14.6
7 3567 288 12.4
8 3847 360 10.7
9 4099 438 9.4
10 4324 515 8.4
** Q-CFM™ is NOT HVI-916 'as-installed' airflow. Please see our blog for info

Features for 4300

  • Q-CFM™ Max Airflow**: 5967 CFM
  • HVI-916 Max Airflow (CA Title 24): 4324 CFM
  • For Square Footage: up to 3500 sq. ft. (under ideal conditions)
  • Fan: 24" industrial grade
  • Motor: 515W ultra-high efficiency, electronically commutated (ECM)
  • Sound Level: 36 - 56 dBA (min - max)
  • Attic Seal: Airtight with industrial grade dampers
  • Insulation: Automatic insulated R-49 Dampers
  • Required Attic Venting: 5.8 sq. ft. min net free area (9 recommended)
  • Recommended Attic Height/Clearance: 48" (contact us for help with tight attic spaces)
  • Controls: Low-voltage hardwired switch with timer, optional wireless remote
  • Grille: High-flow, white aluminum cube-core
  • Installation: Compatible on 16" or 24" O/C joists
  • Electrical: 10 ft. factory-installed power cord, 120 VAC, 60hz
  • Warranty: 3 Years

Dimensions and Weight for 4300

  • Grille Outer Dimensions: 24.5" × 28.5"
  • Rough Opening: 22.5" × 26. 5"
  • Unit Size: 33.25" x 26.25" x 19.25" (Fully Assembled Damper Unit)
  • Shipping Weight: 115 lbs (3 boxes total)

AirScape Sierra 5300 Spec Sheet

What's in the box

This unit comes in three boxes actually, and includes:

5300 fan unit Powered AirLock damper box 20" diameter accoustic ducting Digital Touch Controller 24.5" x 28.5" grille CAT5 cabling and other installation accessories

HVI-916 (CA Title 24) Airflow and Efficiency for 5300

Fan Speed
Setting
Airflow
(CFM)
Energy Use
(Watts)
Efficiency
(CFM per Watt)
1 1367 34 40.2
2 2229 85 26.2
3 2849 152 18.7
4 3319 233 14.2
5 3873 330 11.7
6 4176 435 9.6
7 4649 560 8.3
8 4937 690 7.2
9 5231 807 6.5
10 5350 825 6.5
** Q-CFM™ is NOT HVI-916 'as-installed' airflow. Please see our blog for info

Features for 5300

  • Q-CFM™ Max Airflow**: 7196 CFM
  • HVI-916 Max Airflow (CA Title 24): 5350 CFM
  • For Square Footage: up to 4500 sq. ft. (under ideal conditions)
  • Fan: 24" industrial grade
  • Motor: 825W ultra-high efficiency, electronically commutated (ECM)
  • Sound Level: 36 - 61 dBA (min - max)
  • Attic Seal: Airtight with industrial grade dampers
  • Insulation: Automatic insulated R-49 Dampers
  • Required Attic Venting: 7.1 sq. ft. min net free area (10 recommended)
  • Recommended Attic Height/Clearance: 48" (contact us for help with tight attic spaces)
  • Controls: Low-voltage hardwired switch with timer, optional wireless remote
  • Grille: High-flow, white aluminum cube-core
  • Installation: Compatible on 16" or 24" O/C joists
  • Electrical: 10 ft. factory-installed power cord, 120 VAC, 60hz
  • Warranty: 3 Years

Dimensions and Weight for 5300

  • Grille Outer Dimensions: 24.5" × 28.5"
  • Rough Opening: 22.5" × 26. 5"
  • Unit Size: 33.25" x 26.25" x 19.25" (Fully Assembled Damper Unit)
  • Shipping Weight: 120 lbs (3 boxes total)

It lives in your attic

Big and powerful, yet ultra-quiet and efficient. The AirScape Sierra delivers stealthy whole house ventilation, pushing hot air out through existing attic vents, and drawing cool evening air in through open windows.

Powered Airlock™ damper doors

An AirScape exclusive, and the main feature upgrade from the Ventura. Sturdy motorized damper doors tightly seal off your attic to prevent air leaks, dust and pests from entering your living space. R-49 insulation prevents heat loss and condensation in cold weather. We even added golf ball-inspired dimples to help smooth airflow over the door surface and improve efficiency. We recommend this superior system for all homes, but it becomes critical in regions with cold winters.

Powered Airlock™ damper doors

An AirScape exclusive, and the main feature upgrade from the Ventura. Sturdy motorized damper doors tightly seal off your attic to prevent air leaks, dust and pests from entering your living space. R-49 insulation prevents heat loss and condensation in cold weather. We even added golf ball-inspired dimples to help smooth airflow over the door surface and improve efficiency. We recommend this superior system for all homes, but it becomes critical in regions with cold winters.

Sizing your AirScape Sierra

We offer whole house fans in a wide range of airflow capacities to meet the needs of every size of home. In general, a bigger house needs a bigger fan.

Home Size

1500 - 2500 sf

Airflow Required

2000 - 3500 CFM

Recommended Models

LiftLock Compact

3200

3400

4300

Home Size

2500 - 3500 sf

Airflow Required

3500 - 5000 CFM

Recommended Models

4300

5300

Home Size

3500 - 4500 sf

Airflow Required

4500 - 5500 CFM

Recommended Models

5300

House under 1500 sq ft? See our compact AirScape 1.7 or AirScape LiftLock drop-in units.

Bigger is better

We always recommend the largest unit your space and budget will allow. Here’s why: a larger fan moves more air at a lower RPM, which is quieter AND more energy efficient at the same time. Learn more

Using your AirScape

Our 10 speed settings provide the control you need for effective cooling that is easy to live with. Adjust the speed below to get a feel for the experience.

Low speed | 1-2

Use case: All night long to keep things fresh and maximize thermal mass cooling of the building and contents.

Perceived sound level: Practically silent, even directly under the vent.

Listen

Amazing power
Ultimate efficiency

Optimal air movement

The performance is in the details

Draws lots of air,
not lots of attention

Precision electronics

Master the evening breeze

Smooth Installation

AirScape systems can typically be installed by a skilled handyman in 4-6 hours. And while we always recommend one of our experienced AirScape Installers, no special skills are required. Watch the 30-second overview above to get an idea.

INSTALLATION GUIDE

Bring the outdoors in

Reduce your energy footprint and dramatically improve the livability of your home with fresh natural breezes that are a joy to sleep in. Instead of living in stale, recycled refrigerated air, an AirScape fan will change the air in your home between 4 and 10 times an hour, with near-silent operation. In a survey, over 80% of users said their AirScape fan “absolutely” adds to the enjoyment of their home. 85% said they were either “thrilled” or “very satisfied” with their AirScape purchase.

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“It’s the best home improvement you’ll ever make”

User Reviews

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