Wi-Fi HV3400 R38 Ghost Whole House Fan

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Tamarack Wi-Fi HV3400 Ghost R38 is compatible with smartphones and smart home devices. This popular, easy to install 3400 CFM fan cools your home, can improve indoor air quality, has innovative self-closing R38 insulated doors to keep cool air in the living space.


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The Tamarack Technologies, Inc. Wi-Fi HV3400 Ghost R38 is a Whole House Fan that easily mounts in the attic on 16 or 24 inch on center joists.  This unit has Wi-Fi capabilities built in and can be controlled by an app on your smart phone or tablet. The Wi-Fi Ghost is also compatible with Amazon Alexa and Google Home. This 3400 CFM* fan quickly circulates air and cools your home whenever the outdoor air is cooler than the indoor air. The HV3400 Ghost R38  fan operates at two speeds to exhaust hot air, indoor air pollutants, allergens,  moisture  and odors out through attic vents or gables while pulling cool, fresh air into the home through the open windows. The air exchange naturally cools your home and can improve the indoor air quality.

Like all Tamarack Technologies HV Series Whole House Fans, the Wi-Fi Ghost HV3400 R38 features a unique self sealing door design. The unit includes R38 insulated doors that open automatically when the fan is operating and seal shut automatically when the fan is off. The insulated door design prevents cool air from your living area from escaping to the attic. The insulated doors also prevent heat loss through the attic during the cooler months.

Installing an HV3400 Ghost R38 Whole House Fan reduces energy consumption and saves money. Whole House Fans use 10% of the energy of a central air conditioning system. Because Whole House Fans cool the home, they also reduce the amount of energy your air conditioner uses, which will reduce your energy bill.

Based on the quality of this product and ease of installation, the Tamarack HV fans have been featured twice on the popular home improvement show “Ask This Old House”. A clip of the episode can be viewed here.


  • Two speed- Moves air at 1900 CFM on low speed and 3,400 CFM (cubic feet per minute)*on high speed
  • Compatible with Amazon Alexa and Google Home
  • Only whole house fan brand with R38-insulated self-sealing doors (also available in R50 insulation)
  • Quick and easy installation
  • Energy efficient
  • Optional hardwire operation**


  • 24.5″ x 16.5″ white ceiling grille
  • 6 ft power cord
  • Two speed Wi-Fi hub attachment
  • 3-year warranty with an available extended warranty


  • Reduce energy costs by up to 80%
  • California Title 24 compliant
  • Listed in the California Energy Commission Modernized Appliance Efficiency Database
  • Improves the home’s HERS score (This index is the industry standard for measuring the energy efficiency of homes)

*CFM rates measured in a controlled test environment. Your results may vary due to building construction.
**Use of any type of control other than those we recommend will void product warranty. Recommended controls for hardwired fans include single pole single throw wall switches or spring-wound mechanical timers.

UL Component UL Listings; E115252, E20888, E170149


The app includes the following features and may be downloaded from the Google Play Store or Apple App Store

– Timer setting (up to 8 hours)
– Always On “Hold” function
– Two speed fan setting
– Ability to connect to other Wi-Fi whole house fans
– Temperature display

Product Specs


Wi-Fi Installation


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