Tjernlund Products' inception dates back to 1938 when Emil Tjernlund and his son Robert started designing and manufacturing oil fired forced air furnaces and custom packaged roof top heating and cooling equipment.
Tjernlund Products is still owned and managed by Emil's grandsons Robert, Tom and Emil's great grandson Bob. Over four generations, our mission has been to provide quality engineered and manufactured products that solve exhaust, ventilation and heating/cooling problems.
Tjernlund UnderAire Crawlspace Ventilator Fan Moisture Mold Reducing
UnderAire Crawlspace Ventilator Fan Moisture Mold Reducing
Fan powered crawl space ventilation quickly reduces moisture helping to protect both home and occupants.
Ventilates excess moisture, the cause of mold, mildew and wood rot. Increases air circulation to fight condensation.
Constant operation helps vent radon, treated wood off-gassing and odors that might otherwise migrate into living areas.
Exhaust musty air or air contaminated by wood off-gassing or radon
Supply fresh make up air in tight homes or for stoves and fireplaces
Position one fan in each direction for balanced fresh air exchange
Ventilate hot garages, storage areas and workshops
UnderAire Ventilator Fans
One fan and large face-plate sized for ventilation openings through block foundations. Includes thermostat, dehumidistat and pre-wired 6" power cord.
Two fans and large face-plate sized for ventilation openings through block foundations. Includes thermostat, dehumidistat and pre-wired 6" power cord.
Power ventilate musty, damp crawl spaces through existing passive vents. Controlled by a dehumidistat which actuates the fan if the relative humidity rises above the selected set point.
Excessive Humidity Levels
Humidity can promote fungus growth and increased termite activity. Humidity may also cause plumbing failures due to rust and corrosion.
Constant operation helps vent radon gases, treated wood off-gassing and other odors that might migrate into living areas. Deluxe models (V1D, V2D & V4D) are controlled by a dehumidistat which actuates the fan if the relative humidity rises above the selected set-point.
Return or exchange within 30 days from the delivered date.
1. Items received within 30 days from the delivered date.
2. Items received unused, undamaged and in original package.
3. Return shipping fee is paid by buyer.