HV3400 R50 Ghost Whole House Fan


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The HV3400 Ghost will cool your home and can improve air quality by exhausting hot, stuffy air and indoor air pollutants through attic vents and replace it with fresh air. The Ghost moves up to 3400 CFM of air. The unit is equipped with unique R50 insulated doors that open and close automatically.

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The Tamarack Technologies, Inc, HV3400 Ghost R50 is a Whole House Fan that easily mounts in the attic on 16 or 24 inch on center joists. The unit can be mounted horizontally or vertically. This 3400 CFM* fan quickly circulates air and cools your home whenever the outdoor air is cooler than the indoor air. The HV3400 Ghost R50 operates at two speeds  to exhaust hot air, indoor air pollutants, allergens, moisture, and odors out through the 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 HV3400 R50 features a unique self sealing door design. The unit includes R50 insulated  doors that open automatically when the  fan is operating and seal shut automatically when the fan is off. The insulated door design prevents the cool air from your living space from escaping to the attic. The insulated doors also prevent heat loss through the attic during cooler months.

Installing an HV3400 Ghost R50 Whole House Fan reduces energy consumption and saves money. Whole House Fans use 10% of the energy that a central air conditioning system uses.  Because the HV3400 Ghost cools your home, it reduces the amount of energy needed to run your air conditioning  which reduces your energy bill.

Based on the quality of this product and the 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 Speeds move air at 1,900 CFM or 3,400 CFM (cubic feet per minute)*
  • Only whole house fan brand with R50-insulated self-sealing doors (also available in R38 insulation)
  • Quick and easy installation
  • Energy efficient
  • Optional hardwire operation**


  • (2) Radio frequency key fob remote controls
  • 24.5″ x 16.5″ white ceiling grille
  • 6 ft power cord
  • 3-year warranty (extended warranty available)


  • 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.

Spec Sheet


HV3400 “Ghost” Whole House Fan Installation Video

Click Here To View PDF Installation Manual:



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