Model codes permit use of large-radius dryer vent elbows: Section M1502.6 of the 2006 International Residential Code, Section 504.6.4 of the 2009 International Mechanical Code, Section M1502.4 of the 2009 International Residential Code, Section 504.6.4 of the 2012 International Mechanical Code and Section M1502.4 of the 2012 International Residential Code all permit large radius elbows. In these locations spilling laundry dryer vent moisture will certainly encourage mold growth. Best answer: Yes you can get closer to the wall with the periscope about 2’ then you can with the regular dryer vent hose. A periscope dryer vent let the dryer sit closer to the wall, and the smooth metal collects less dryer lint than a flexible dryer hose. Made of flexible aluminum foil, this is the most common type of dryer transition ducts—those that connect from the appliance to the main duct that runs to the outdoors. We have no relationship with advertisers, products, or services discussed at this website. As the dryer is operating, the lint, moisture, and heat are vented into the bucket. Insulation around the dryer vent is not normally necessary if you install straight, well-supported metal ductwork sloping to its exit point at the building wall.But if ductwork must be routed up and down through space such as an attic, air conditioned interior, or dryer vents routed through a cool crawl space where otherwise the duct will be exposed to cold air the result will be a significant level of condensation within the dryer vent duct system.For such areas and routing you should consider using insulated solid metal ducting or insulated flex duct to avoid condensation buildup, corrosion Our photo above illustrates how we connected a clothes dryer outlet through a laundry room wall into an adjoining utility room where the duct could rise to its ceiling and outdoor exit destination. Some of these factors are the material type, size, flexibility and rigidity among several other factors. (See the dryer vent duct photos just above).Watch out: manufacturers typically advise against using screws to secure dryer vent duct sections as the end of the screw protruding into the duct interior increases lint-trapping and may make the vent duct harder to clean. Our second clothes dryer vent exhaust mistake is shown above: the installer hung the vent opening at the crawl space vent screen. Although we have observed this material widely used in homes as "dryer vent ducting" it should not be used for that purpose.Cranor elaborates: "Plastic" dryer duct" sold at various suppliers does not say on the packaging that it can be used for clothes dryer ducts....it specifically says bathroom venting. UPDATED RANKING https://wiki.ezvid.com/best-periscope-dryer-vents Disclaimer: These choices may be out of date. Because rigid duct cannot be bent, it is assembled with elbow fittings that allow the duct to turn 45 or 90 degrees, depending on the type of elbow. Available in aluminum and galvanized steel, the rigid metal duct is very smooth on its interior, so air flows through with little friction, and it catches the least amount of lint of any duct material. Slope the clothes dryer vent duct downwards towards its building exit - this will avoid condensation accumulating inside the ductwork and dripping back into the building ceilings or insulation.It's fine for the dryer vent to rise vertically to enter the building ceiling, but within the ceiling the vent should slope downwards towards its exit point at the building exterior wall.The same design should be applied to dryer vents that turn down to exit the building below a floor and/or through a basement or crawl space ceiling. plastic ties, or second best, duct tape. This is often a problem since dryers tend to be tucked away into small areas with little room to work. Despite its popular use for many years, the plastic duct is not allowed by most building codes. And Cranor points out that spilling dryer vent products into the building can be a dangerous carbon monoxide hazard as well, at least for gas-powered clothes dryers. Our photo below illustrates a typical clothes dryer periscope vent that permits the back of the dryer to be placed closer to the wall than would be possible with round dryer vent ducting. Complete kit with all parts necessary to vent your dryer. Photos courtesy of Eric Galow, Galow Homes. So we reviewed, best dryer vent hose for tight space. Some dryer manufacturers permit installations with dryer exhaust venting of much greater lengths [though perhaps combined with a requirement to avoid use of 90 degree turns in the duct system]. Our photo below illustrates a typical clothes dryer periscope vent that permits the back of the dryer to be placed closer to the wall than would be possible with round dryer vent ducting. Clothes dryer exhaust vent installation codes & specifications: How to install a clothes dryer exhaust vent: choosing materials, routing vent ducting, dryer vent duct connections, dryer vent termination at an exterior wall. Exhaust vent must be securely fastened to a noncombustible It's also called a periscope dryer vent.Offset vents allow the dryer to be installed closer to the wall than a typical basement installation, using a 90 degree 4-inch duct elbow on dryer's discharge vent. Periscope-style dryer vent pipes are thin and inflexible, which offers two distinct benefits. Find periscope dryer vents at Lowe's today. Indoor dryer vent buckets contain water in a bucket, to which the dryer vent is attached. An exception to this length reduction for dryer vent elbows may be permitted for large-radius bend dryer vent products such as Dryer-Ell®. This reference & research material has moved to CLOTHES DRYER FIRE RESEARCH. Vent the dryer duct to outside: Our photo above shows a dryer vent spilling directly below the building first floor into a soaking wet crawl space. Here are the most common dryer duct materials used to install a dryer vent. Please Note: Prices, promotions, styles and availability may vary by store and online. This can be a great space-saver as long as the dryer and the vent are close together. collect water and risk leaking into the building. If you add 8 inches for each end it would be 30 inches. The whirlpool is an outstanding choice because it gives control over your dryer’s position and allows you to create a connection without occupying the space within the room. Unfortunately, that is not the case. The exhaust on my dryer is at the bottom. This dryer vent is designed for safe indoor venting and can be used when it is not possible to use outdoor ventilation for your dryer. We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. Builder's Best - 10149 084149 SAF-T-DUCT Zero Periscope Adjustable Dryer Vent Periscope, Adjustable 0-5" Length. What's wrong with using this material at a clothes dryer? Where space is limited, an adjustable offset dryer vent is used. The vent shown can be used on clothes dryers made by Admiral, Amana, Caloric, Crosley, Estate, Inglis, Jenn-Air, KitchenAid, Roper, Vesta, and Whirlpool. They're solid metal as well, so you won't have to worry about poking holes in them or bending them like you would with a hose. Some are flexible, and others are rigid. Foil duct is held in place with dryer clamps or large hose clamps. Keep all connections tight and avoid air leaks. Like I said before I have one behind my dryer and it is very difficult to reach behind the dryer to tighten the clamps on the dryer and pipe that sticks out of the wall. 50. Periscope dryer vents are usually telescoping in length and sold in ranges such as 0-18" tall, or longer. Although semi-rigid metal duct is often stronger and has a smoother interior (catches less lint) than foil duct, it is more common to find listed foil duct than listed semi-rigid. So a clothes dryer vent with three 90 degree bends to come out of the back of the dryer, run up a wall, and then across a ceiling or under a floor to a wall vent would have a maximum length of (25 - (3x5=15)) just ten feet! Dryer vents are often made from flexible plastic or metal duct, which may be easily kinked or crushed where they exit the dryer and enter the wall or floor. Complete details about clothes dryer exhaust vent installation are provided below in this article at CLOTHES DRYER VENT INSTALLATION DETAILS. Metal ducts, having a smooth interior surface provide these advantages when used on clothes dryer systems: Above: an angled clothes dryer exhaust vent hood. Irrespective of the type of dryer vents, they are all made with the intention of using it for dryers. Louvered self-closing internal damper keeps out drafts and provides efficient dryer airflow. In the marketplace, dryer vents vary by different factors. Above: a clothes dryer exhaust vent installed in a mobile home can be vented down through the crawl space and outside through the skirting wall, but must never be vented to terminate right in the crawl space. $15.50 $ 15. Above: I'm checking a two-louver dryer wall vent hood that is somewhat resistant to lint clogging. It measures 22 inches from the top of the dryer exhaust to the bottom of the wall vent. provide better air flow, smoother internal surface, slower accumulation of lint debris inside the duct system, won't sag due to weight of accumulating moisture or lint, and, John Cranor [Website: /www.house-whisperer.com ] , ASHI certified home inspector (, Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the. It has a flexible body just 18 inches long. mobile home. It is made from flexible foil so it can be folded up when it is not in use to save space. Clothes dryer exhaust duct material choices that you are likely to find at building supply stores include the materials listed below, and illustrated throughout this article. portion of mobile home and must not terminate beneath the Dryer Vent Hood - Through-the-wall gas or electric dryer tube and vent hood with a removable bird and rodent guard. Also we explain and illustrate problems that result from improper dryer vent installation design, materials, routing, and filtering including dryer vent clogging, clothes dryer fire hazards, building moisture and mold problems, and increased clothes dryer operating costs due to poor or blocked dryer vents. This discussion, now found at CLOTHES DRYER TEMPERATURES gives the various temperatures found inside of clothes dryers, in and at the clothes dryer tumbler or drum, heater, and in the dryer exaust vent during both normal safe operation and during unsafe conditions that risk a dryer fire or building fire. Not only did lint clog the crawl space vent, but most of the damp dryer exhaust air soon was being spilled into the crawl space ceiling. Connect the flexduct to the fan itself using Getting a dryer vent periscope would be actually a better tool to have in your home rather than a duct hose which may be made out of plastic and not metal. The bottom line is, don't use it. The dryer vent should be of 4 inch diameter, however when the thin foil or vinyl is used and compressed it as well as reducing the diameter to 3 inches it has lots of ridges to trap and accumulate lint and reduce air flow. Specs for using flex duct for dryer venting: If despite our recommendation for metal exhaust duct material you nevertheless are using flexible fan duct, stretch the flexduct tight to keep it as straight and smooth inside as possible. A dryer vent periscope can come in handy for connecting the two. In the photo (left) the droopy flex-duct will certainly invite clothes dryer moisture to condense and run back to the home's ceiling rather than exiting at the ridge. . FREE Shipping on orders over $25 shipped by Amazon. If the duct becomes blocked with lint, the duct can become very hot and potentially catch fire. It is typically installed with clamps. Connecting the dryer vent to the back of the clothes dryer: space is usually tight between the clothes dryer and its exhaust vent because homeowners want to push the dryer back as close to the wall as possible.If you use flexible or even semi-rigid duct for the dryer connection at this location (a most common practice) the duct is likely to be bent and crushed closed, increasing dryer operating time, cost, and fire risk. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Industry standards recommend that the maximum "concealed" rigid metal ducted clothes dryer vent length be no more than 25 feet (IRC; some codes permit 35-feet). Here are other clothes dryer vent materials we have encountered: Watch out: Use rigid or semi-rigid metal dryer vent material [we recommend rigid metal dryer vent ducting]: Virtually all independent authorities, including the US CPSC, Underwriters Laboratories, and the Association of Home Appliance Manufacturers, and experienced home inspectors such as Cranor all recommend the use of rigid or semi-rigid metal ducting for clothes dryer exhaust venting. InspectAPedia tolerates no conflicts of interest. Always use metal duct tape to secure the joints; don't use screws, because they catch lint. But the variety of materials and duct prices can fool you into making a bad or even a dangerous choice. It allows you to push the dryer very close to the wall. Maximum clothes dryer duct length & number of bends or elbows: Keep the vent duct sections as short, straight, and directly routed to the building exterior as you possibly can. (Fantech 2012). Because all types are sold for use with dryers, you would naturally assume that all are suitable for this application. Introducing "One Thing": A New Video Series, The Spruce Gardening & Plant Care Review Board, The Spruce Renovations and Repair Review Board. This hazard has resulted in numerous house fires. 50. My dryer exhaust and the vent in wall almost line up dryer ducts are yours up to code c w liance service my dryer exhaust and the vent in wall almost line up whirlpool 0 18 in dryer periscope with 2 clamps 4396037rp the periscope dryer vent to ceiling duct doityourself community how to hook up a dryer vent in e my 5 steps home. That duct caused the dryer to stick out about 6 1/2 inches from the wall. Our metal dryer vent installation shown just below has the right idea, though not a very neat installation and not properly sloped. The periscope dryer vent duct is ideal for tight place as well. This article series describes good practices for clothes dryer vent installation, lint traps, wall vents, filters, and screens. It has a wide rectangular shape except for the two ends where it connects to the dryer and the vent outlet. 2” x 6” periscope that will extend 41” and can be cut down to 8” Quick connect will allow dryer to fit as close as 2” to 3” from wall using no hose. Builder's Best - 10149 084149 SAF-T-DUCT Zero Periscope Adjustable Dryer Vent Periscope, Adjustable 0-5" Length. Shop periscope dryer vents and a variety of building supplies products online at Lowes.com. Seal the periscope vent using a spray foam sealant and your new venting set up should hold and keep moisture and hot air out. Click to Show or Hide Citations & References, CLOTHES DRYER VENT TERMINATION & SCREENS, CLOTHES DRYER VENT CLEARANCES & TERMINATION, CLOTHES DRYER LINT CLOG RESISTANT SCREENS, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES. Do not vent the clothes dryer indoors nor into an attic, crawl space, or other enclosed area. Second connect the Now I know that leaves me with almost no room for hoses and a vent, but I believe a found a fix. Most dryer ducts are round and 4 inches in diameter. You may need to be a little creative to attach everything together. Whirlpool® In-Wall Periscope Vent. On the other side of the wall in the photo shown above a periscope type connection adapted the dryer outlet to the through-wall vent. It is also adaptable to vertical, horizontal, and diagonal installations. Get it as soon as Wed, Dec 2. Most clothes dryer exhaust vent installations use 4" diameter vent piping, the minimum-allowed. I planned to sort of snorkel this vent over the top of the dryer and have that run into the hose that runs out the ceiling. The preferred or most-recommended dryer vent routing is shown above, adapted from Whirlpool dryer vent instructions cited in detail below. I had to buy 2 connector to get the job done because the connectors on the periscope just aren’t long enough. If the dryer vent is blocked, the dryer operates at higher temperatures. Dryer vent pipes, properly called vent ducts, come in a variety of materials. Slim duct, sometimes called periscope duct or known by the brands Tite-Fit or Skinny Duct, is a telescoping rigid aluminum duct designed for transition ducting in tight spaces. If the wall vent does not allow the periscope vent to sit flat against the wall, any advantage is lost (see photo after Geek Squad installed the periscope vent). Dryer vents are usually placed toward the bottom of a dryer, and the vent in the wall is usually placed with a mind for convenience, rather than suitable proximity to the vent outlet. That's because a normal 4-inch 90-degree metal dryer vent elbow bends 90 degrees in a 4-inch radius while the Dryer-Ell product makes its bend over a more gradual 10-inch radius. The periscope clothes dryer vent shown is distributed by Whirlpool and depending on size can be purchased for about $20.
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