A Guide to Installing an Inline Dryer Duct Booster Fan
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A Guide to Installing an Inline Dryer Duct Booster Fan

Installing a dryer duct booster fan will make your dryer operate more efficiently and dry clothes faster.

Knowledge Comes From Experience: “Information is not knowledge. The only source of knowledge is experience.” Einstein said that, not this humble writer. What I will do is vouch for the truth they contain. One can read and commit much information to memory, but that information does not actually become knowledge until one experiences that information in action. I had studied the literature on dryer duct booster fans, their value and how to install them but I had to experience the results of installing one before I could start recommending that other people install one or that they have one installed.

Why Install A Dryer Duct Booster Fan?

The first sign that you may need to install a dryer duct booster fan is when your clothes does not dry as quickly and as efficiently as they should. In order for a clothes dryer to dry your clothes, air must flow freely through the drum cavity. Air flow does not become a problem until the dryer duct exceeds 25 feet in length or unless there are sharp bends in the duct work. I encountered both of those problems when I designed my wife's laundry room in the basement of our beautiful, old farmhouse. I ended up with four 90-degree bends in the duct work, and the linear length of the ducting was 30-feet. Why so long? The main reason is that I mounted the vent 10-feet above the ground to keep it clear of 6 to 7 feet snow drifts that we get up here on Walch's Mountain.

Install A Dryer Duct Fan When the Duct Exceeds 25-Feet Equivalent Length.

What do I mean by equivalent length? Beside the easy to measure straight runs of duct, you have to add in the equivalent length of 90-degree and 45-degree elbows. Each 90-degree elbow is equivalent to 5-feet and for each 45-degree elbows equivalent 2.5-feet.

The Lint Blitser® Blower

The Lint Blitser® Blower is my favorite for residential installation. The Model LB1 will maintain duct velocities of 160 c.f.m. (cubic feet per minute) In ducts with an equivalent length of 100-feet. A 120-volt blower with a FLA (Full Load Amperes) of 0.5 Amperes, it is very economical to operate. The LB1 also has a pressure switch that turns the booster on as soon as the dryer starts sending air through the ducts. The Lint Blitzer® blower is equipped with a special impeller that prevent lint clogs. In fact it is guaranteed for 5 years against lint clogs.

Easy to Install

The Lint Blitser® LB1 Blower is very easy to install. The blower can be mounted in any vertical or horizontal run of duct work. All you have to do is pick a point near a 110-volt receptacle to plug its power cord into. If there is no receptacle to plug into, you will need to install a receptacle outlet in the location where you intend to install the blower. If you are uncomfortable working with electricity, you may want to hire a professional to install the receptacle.

Street Price

The LB1 cost about $226 but that cost will be recouped quickly from the electrical energy you will save by having to run your dryer less.

Manufacturer installation instructions

Additional resources:

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