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HEARTLAND 21000 Dryer Vent Closure

418 customer reviews
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  • Easy-to-install dryer vent closure
  • Lets warm air escape when open
  • Prevents cold air from entering when closed
  • Prevents insects from entering through dryer vent
  • Vent must be installed vertically and sliding may need to cut for proper installation.
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Product Description

From the Manufacturer

This easy-to-install dryer vent closure lets warm air escape when open and prevents cold air from entering when closed. It also prevents insects from entering through the dryer vent.

Product Information

Technical Details
Part Number 21000
Item Weight1.8 pounds
Product Dimensions7.5 x 7.5 x 13.5 inches
Item model number21000
Volume1 cubic centimeters
Item Package Quantity1
Batteries Included?No
Batteries Required?No
Warranty Description90 DAYS
Additional Information
Best Sellers Rank #9,959 in Home Improvement (See top 100)
Shipping Weight1.8 pounds
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First AvailableMay 14, 2003
Warranty & Support

Product Warranty: For warranty information about this product, please click here

Customer Reviews

Most Helpful Customer Reviews

149 of 157 people found the following review helpful By jawarrior on February 15, 2009
I cannot say enough good things about this product. Both I, and my brother-in-law, have had this vent closure installed on our homes for several years with no complaints whatsoever. I find it hard to believe some of the things said by two other reviewers.

One says the vent makes a mess - uh, DUH! Your dryer is making the mess, not the vent closure. Your dryer's filter screen lets a lot escape, and so it exits the vent closure as it should! If it didn't escape it would clog the vent and cause a dryer fire as air flow is strangled causing temperature to rise in the line.

Another reviewer wrote a book about his brick problems, even complaining about having to use caulking. He also said it HAD to be painted to prevent ultra violet light damage. Well, if caulk is a problem then let it leak air. The heat loss will equal the cost of a case of caulk in short order, but that is the alternative. As for HAVING to paint it, nothing could be further from the truth! Mine, and my brother-in-law's, have been unpainted for many years now with no signs of brittleness yet. But, if you want to paint it, that should take a whopping 15 minutes. Geez, a complainer in every crowd, I guess!

My vent closure has eliminated cold air from entering the laundry room! Opening our dryer door used to feel like opening a freezer door. Our feet would turn to ice in that room until I installed this vent closure!! And the floating cup, despite lint build-up, has maintained a tight air, bug & rodent-proof seal when the dryer is not running. It cleans easily if you have even the slightest mechanical skills.

In my opinion, this product will pay for itself in home heating and cooling costs in less than one season while keeping out rodents and insects. Don't let the naysayers seize the day!!!
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33 of 33 people found the following review helpful By Guy the Gorilla on December 14, 2009
Verified Purchase
I had the same problem as many other reviewers for this product have reported: an unusually cold laundry room that was noticeably cooler than the hallway leading to it or the rest of the house, even though the laundry room has a heating/air conditioning duct. After installing better weatherstripping in the window and more insulation in the (unheated) space above the ceiling, the room was still cooler than it should have been. Turned out the problem was the cheap metal dryer flap vent which was perpetually held cracked open by lint and other debris, allowing cold air to come in through the dryer and to radiate through the thin plastic hose.

I can report that this device significantly improved the situation. The room is noticeably warmer since I installed it. The design is clever - on the inside there is a plastic cap that is blown up when the dryer is turned on, but because it is contained within the plastic housing, it will always drop perfectly back into place, sealing the opening, once the dryer shuts off. Moreover, there is no way lint can get caught in the wrong place to cause the cap not to seat properly. Note that you cannot see this interior cap in the picture, but if you remove the saucer shaped lid on top of the unit (which you CAN see in the picture), the cap I'm talking about is there on the inside, fitting over the tube that forms the terminus of your dryer duct.

I can't comment on the situation of the person (one-star reviewer) dealing with a masonry wall, who needs to get an appropriately sized piece of PVC pipe to use as an extender. What I can say is that I was able to properly install my vent on an insulated fiberboard exterior wall sheathed with aluminum siding in about 15 minutes.
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33 of 37 people found the following review helpful By Eviltwin on August 6, 2009
Verified Purchase
I have lap siding (Hardi Plank cement boards) with a 5 inch reveal. To mount the base of the dryer I put down a thick bead of silicon caulk on the siding where the square base would be positioned and then fastened the base with the enclosed screws at the four corners of the base. I pre-drilled the holes into the cement siding. I used the caulk to make sure I had an air tight seal. I let the base and caulk set for 24 hours and then placed the vent top with the floating valve into the base, removed the cap, and turned on the dryer to check the seal. The floating valve shot right up out of the base almost 2 feet into the air, so I felt confident that the seal around the base was air tight and all the exhaust air from the dryer was coming out of the vent. I fastened the top of the vent to the siding with the enclosed screw, again pre-drilling the hole in the the cement siding. When the cap is in place the cap directs the exhaust air downward and that keeps the floating valve from shooting out of the top of the vent. The vent works just as advertised, sealing up nicely when the dryer is off. I noted that some lint tends to accumulate between the lip of the vent top and the cap, so when I check the insides of the vent for cleaning by removing the cap, I will be careful to scrape around the lip of the vent where the cap fits and keep that area lint-free. Overall a great product, fairly easy installation (especially if you don't have lap siding to contend with), and a lot better design than the normal dryer vent with the plastic hinged vanes that open when the dryer is on and close (somewhat) when it is off. We had a mouse get inside the normal dryer vent and it died there, so that was not a good thing. The Heartland vent will prevent that from happening and provide a positive seal against the outside air.
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