Tjernlund Deluxe UnderAireT 220 CFM Crawlspace Ventilation Fan. Two fans and large faceplate sized for ventilation openings through block foundations. Includes thermostat, dehumidistat and pre-wired 6' power cord.
Fan powered crawl space ventilation quickly reduces moisture helping to protect both home and occupants.
FEATURES and BENFITS: * Ventilates excess moisture, the cause of mold, mildew and wood rot. Increases air circulation to fight condensation. * Constant operation helps vent radon, treated wood offgassing and odors that might otherwise migrate into living areas. * Galvanized face plate may be trimmed if necessary * Includes adjustable dehumidistat with automatic low temp shut off & restart switch (40 F off, 50 F to turn back on) to avoid freeze up * Includes mounting hardware and installation / owners manual
SPECIFICATIONS: Performance: 220 CFM Dehumidistat: Off/On or 20% - 80% RH Thermostat: Opens at 40 degrees F Overall Dimensions: 18" x 9" x 2" Fans and Dehumidistat Dimensions: 13-3/4" X 4-3/4" X 2" .62 Amps Maximum
How to determine the number of UnderAireT Ventilators needed: Calculate the cubic area of the crawl space by multiplying the length x width x height. Divide this number by 15 to determine the minimum CFM necessary to fully ventilate the space in 15 minutes. Example: 20' wide x 40' long x 3' high crawl space = 2,400 cubic ft. 2400 cubic ft. ÷ 15 minutes = 160 CFM of ventilation. Choose one V2D ventilator.
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
Very pleased with the product
3/1/2011
4.0
Crawlspace Fan
By Mtguy
from Bozeman MT
About Me Handyman, Homeowner
Pros
Easy To Install
Quiet
Sleek Design
Cons
Best Uses
Basements
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
I have not needed to use it yet, but did test it. Runs smoothly and quietly. The two-fan model fits within the space of a normal ventilation space for a poured concrete foundation.
It also comes with anchors/screws for mounting in masonry.
11/3/2010
(1 of 1 customers found this review helpful)
5.0
Product performs as advertised
By Vince
from Marco Island, FL
About Me Homeowner
Pros
Easy To Install
Quiet
Sleek Design
Cons
Best Uses
Basements
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
Product performs as advertised...very quiet and vibration free
11/3/2010
5.0
Quality Product & Easy Installation
By Carruth
from Hendersonville NC, Western North Carolin
About Me Homeowner
Pros
Easy To Install
Quiet
Sleek Design
Cons
Best Uses
Basements
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
[...] products DON'T compare to this quality fan vent cover & vent cover to move crawl space air. We had severe moisture & mold (now corrected) & with this fan moving air & quality covers...moisture & problems will be a thing of the past. On a scale of 1-10 (10 being the best)....rate of this product 15!!!! We are pleased to have found this superb quality product & the ease of installation was a plus.
10/13/2010
4.0
NIce! I will probably buy a second fan.
By Cheddar Dan
from Knoxville, Tennessee
About Me Occasional Handyman
Pros
EZ install if Pwr avail
Cons
Best Uses
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
Installed in North wall of crawlspace to reduce radon and musty odor in downstairs den adjacent to crawlspace. Radon level has dropped slightly in the den, but I feel a second set of fans will need to be installed on the South side of the crawlspace for extra ventilation to this area. The den will probably require an official radon floor system be installed in addition to these fans to thoroughly reduce the radon level and musty smell, but the fans are still a nice, quality addition to the whole project.
10/5/2010
5.0
Works Great, Quiet,
By T Pittman
from Greenville, SC
About Me Handyman, Professional
Pros
Easy To Install
Powerful
Quiet
Sleek Design
Cons
Best Uses
Basements
Crawl spaces
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
[...] Easy to install (I used "Tapcons" into masonry). Using unit for crawl space ventilation (moisture). Customer was impressed with product. Runs quietly, but powerful.
9/28/2010
(1 of 1 customers found this review helpful)
5.0
Great Product
By Sal
from Lanoka Harbor, NJ
About Me Handyman, Homeowner
Pros
Easy To Install
Quiet
Cons
Best Uses
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
Easily installed. I used rubber grommets to isolate the fans from the house to further eliminate any noise/vibration. Fans are very quiet. I am still running tests to determine most efficient number of vents to leave open in my crawl space. Fans did have an immediate impact on lowering crawl space humidity.
9/17/2010
5.0
Quality product at a fair price
By Island Home Improvement
from Anacortes, WA
About Me Professional
Pros
Easy To Install
Powerful
Quiet
Sleek Design
Cons
Best Uses
Basements
Crawlspaces
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
Came exactly as described. Installed easily. Created good air flow in crawlspace. Humidistatic control works well.
9/10/2010
4.0
This is a good product -- so far
By Dan a do it your selfer.
from Asheville NC
About Me Homeowner
Pros
Easy To Install
Quiet
Sturdy design
Cons
Best Uses
Crawl Space
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
This product does what it is supposed to do - move air to ventilate the crawl space. As long as it has the durability to do its job for many years I will be very happy.
9/7/2010
5.0
I would buy this item again when needed
By mr.d
from Evansdale Iowa
About Me Handyman, Homeowner
Pros
Easy To Install
Powerful
Quiet
Sleek Design
Cons
None at this time
Best Uses
Crawl Space
Comments about Tjernlund Deluxe UnderAire™ 220 CFM Crawlspace Ventilation Fan:
using this to ventilate the area under our cabin that is just above ground. It is working very nicely to keep the moisture under control.
