Tjernlund Duct Booster Increases Heating and Cooling Power — 275 CFM | Heaters

Mounting Template: 4in. x 7in.
Dimensions: 7in.L x 4in.
Can be either wired to a standard on/off switch or by wiring the duct booster in parallel with a central furnace blower motor.

Manufacturer Warranty: 12 months parts / 12 months labor

Extended Warranty Plan Description

1 Year

2 Year

Replacement Plan

$6.99 More Info

$10.99 More Info

Accidental Damage Replacement Plan

$10.99 More Info

$15.99 More Info

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Overall Rating

4.7 / 5

3 of 3 would recommend this product to a friend.

Product Reviews

Overall Rating:

5 / 5

Duct Booster, January 21, 2008
By bosco3280 from Commerce, Michigan

"I heat my home with firewood and couldn't get the heat distrubited through out my house. I installed a duct through my attic with a duct booster in it. What a differnece. My duct booster has been in for about 8 years now and runs fulltime all winter and is still going strong."

What is your level of technical expertise?: Home Handyman

Overall Rating:

4 / 5

Duct booster, October 8, 2007
By Blackbear from North Carolina

"I have a maze of duct work in the basement and over two crawl spaces. Almost all of it is planned out very well and the air runs smoothly. However in this one final far stretch and the end of a branch line, the velocity of the air drops too low to make much of an output flow into the very back bedroom. It was not really feasible nor practicle to re-route the whole branch, thus affecting three other rooms working fine. I just needed a little boost. This product worked great. It cannot be directly wired to the blower for operation during heating AND cooling, so you are best to buy the seperate air switch that will operate it in both heating and cooling modes and the wiring is much simplier. There is a catch, the sensitivity of the air switch is fixed, so placing it in a branch with air flow 90 degrees to it is not very reliable to keep the switch in the closed position. Rather place it in the direct path of air flow and it works like a charm. Booster only pulls 0.5A and pays for itself quickly. Am very satisfied and would buy again."

What is your level of technical expertise?: Professional

Overall Rating:

5 / 5

Duct Booster, March 8, 2007
By Lanster from Catawissa Pa.

"Booster works GREAT, Easy to install, Whisper quiet. I will probably buy another one for back-up."

What is your level of technical expertise?: Home Handyman