If the space behind the dryer was any less than the minimal amount required for a periscope vent it would not be possible to get to the clamps. Now I know that leaves me with almost no room for hoses and a vent, but I believe a found a fix. Always use metal duct tape to secure the joints; don't use screws, because they catch lint. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. 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. This reference & research material has moved to CLOTHES DRYER FIRE RESEARCH. In some areas where winter air is very dry homeowners may choose to temporarily spill dryer vent air directly into the building interior in order to try to raise the indoor humidity level. Vinyl duct, and in some situations all flexible duct, is not allowed by building codes. Even if the dryer exhaust vent does extend to the outdoors, an improperly sloped, damaged, or disconnected dryer vent can leak moisture, lint, dust, and even dangerous carbon monoxide (CO) into the building. Builder's Best - 10149 084149 SAF-T-DUCT Zero Periscope Adjustable Dryer Vent Periscope, Adjustable 0-5" Length. 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. Please Note: Prices, promotions, styles and availability may vary by store and online. As the lint accumulates, it can constitute a fire hazard. Find Aluminum periscope dryer vents at Lowe's today. (right) I stuck this guage’s right-angled terminal tube into a vertical section of the vent to measure static pressure. Above you can see that we had to use a pair of elbows to lift the dryer vent duct into the building ceiling cavity. Builder's Best - 10149 084149 SAF-T-DUCT Zero Periscope Adjustable Dryer Vent Periscope, Adjustable 0-5" Length. At above right our second dryer vent duct photo illustrates passage of the duct through the rim joist. 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. By having a Periscope dryer vent ducts, you would be able to vent your dryer without the need to have a flexible ductwork. Like foil duct, semi-rigid is used only for transition ducting and should not be concealed in walls or floors. The minimum clearance to the rear wall for this type of clothes dryer vent is 2 1/2". Terminate exhaust vent outside. cannot exceed 35 feet from the dryer location to the wall or roof termination. " The rigid metal duct is the only suitable duct material for concealed duct installations; that is, the portion of the duct run inside walls, floors, or other areas where the duct is not fully visible. This can be a great space-saver as long as the dryer and the vent are close together. 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 The bottom line is, don't use it. When it comes to measuring out your vent then it won’t actually be that you need a lot of room to install the periscope … This hazard has resulted in numerous house fires. 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. portion of mobile home and must not terminate beneath the Underneath the floor, you’ll need to install another periscope dryer vent facing the opposite direction as the one above-head connected to the dryer. Louvered self-closing internal damper keeps out drafts and provides efficient dryer airflow. Metal tape can be used, too, but clamps make it easier to remove the tubing for cleaning. Aaron Stickley is a licensed plumber with first-hand knowledge in solving home plumbing problems. Here is part one of an Almetal Dryer Vent Periscope installation. U.S.D. You just loosen the screw on the worm clamps (metal circular bands that hold the duct to the vents) and pull the duct off. Dryer Vent Periscope, 0-inch to 5-inch - Includes uniquely designed periscope to allow close placement of the dryer to the wall. Best answer: Yes you can get closer to the wall with the periscope about 2’ then you can with the regular dryer vent hose. The WHIRLPOOL is a slim, dryer vent pipe with separated parts. Our dryer vent installation photos just below illustrate use of 4" galvanized metal dryer ducts. 50. 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. Transition ducts must not be concealed inside walls or other building cavities and usually have a maximum allowed length of eight feet. Seal the periscope vent using a spray foam sealant and your new venting set up should hold and keep moisture and hot air out. Unfortunately, that is not the case. It allows you to push the dryer very close to the wall. 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. 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. If you're working with a small area, then the diminutive Whirlpool 0-to-5 Inch … Leak stains in building ceilings may be traced to condensate leakage from an overhead clothes dryer vent. The periscope dryer vent duct is ideal for tight place as well. Details are at CLOTHES DRYER VENT TERMINATION & SCREENS. 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. 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. The vent provides better air flow than a partly-squashed flexible duct dryer vent, and it resists crushing, therefore it's safer. $15.50 $ 15. 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. 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. Continue reading at CLOTHES DRYER VENT CLEARANCES & TERMINATION - distances required around clothes dryer exhaust vent terminations or exhaust hoods, or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. The vent shown can be used on clothes dryers made by Admiral, Amana, Caloric, Crosley, Estate, Inglis, Jenn-Air, KitchenAid, Roper, Vesta, and Whirlpool. Also if you have ever tried reaching into a dryer exhaust duct to clean it by hand and had your arm ripped open by the SMS screw you may have another objection. Avoid through-roof dryer vent exits: Our photo (left) shows a typical attempt at venting a upper floor clothes dryer through the attic and into a ridge vent - this direction of vent exit may seem convenient but we don't like it much. Here are the most common dryer duct materials used to install a dryer vent. Complete details about clothes dryer exhaust vent installation are provided below in this article at CLOTHES DRYER VENT INSTALLATION DETAILS. Apologies for the delay. 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]. $15.50 $ 15. Despite its popular use for many years, the plastic duct is not allowed by most building codes. It measures 22 inches from the top of the dryer exhaust to the bottom of the wall vent. Whirlpool 0-to-5 Inch. Whirlpool® In-Wall Periscope Vent. Most dryer ducts are round and 4 inches in diameter. Dryer vent pipes, properly called vent ducts, come in a variety of materials. There should be no section of dryer exhaust vent ducting that is inaccessible for inspection and cleaning. Every manufacturer's clothes dryer vent fan installation guide that we reviewed emphasized: make sure that the vent ducting carries moist air all the way outside of the building. Our sketches shown here, adapted from Whirlpool clothes dryer installation recommendations cited at the end of this article, show typical clothes dryer vent routing options includint a special provision for routing the dryer exhaust outside through a crawl space below a mobile home. In these locations spilling laundry dryer vent moisture will certainly encourage mold growth. A "banjo-type" or "periscope type" metal dryer vent connector makes the 90 degree bend connection at the back of the clothes dryer where space is limited. 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! Long 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. Photos courtesy of Eric Galow, Galow Homes. 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). We have no relationship with advertisers, products, or services discussed at this website. This duct section can be inspected and if necessary cleaned by removing the outside vent cover. I want a periscope dryer vent. Do not vent clothes dryers directly into the attic space: you're only putting more moisture into an area where it is already going to be a problem, inviting mold growth on wood surfaces and hidden mold growth in building insulation. Semi-rigid metal (usually aluminum) duct is flexible and similar to foil ducting but quite a bit more rigid. It is also adaptable to vertical, horizontal, and diagonal installations. In the marketplace, dryer vents vary by different factors. For optimum clothes dryer venting we use 4" or larger galvanized metal duct sections and elbows, though aluminum is also acceptable in most locations.Flexible clothes dryer is easy to install, avoids having to mess with elbows in the duct system, and is inexpensive, but that material restricts air flow and may sag, giving you areas that Doing so will lead to moisture condensation on building surfaces, wet, damaged, moldy building insulation, wet building framing members, wall, floor or roof sheathing. The ribbed interior of the flexible duct easily catches lint. Find periscope dryer vents at Lowe's today. plastic ties, or second best, duct tape. Complete kit with all parts necessary to vent your dryer. FREE Shipping on orders over $25 shipped by Amazon. Do not spill the laundry vent air directly into the building attic or roof cavity, basement, crawl space, or other hidden building interior areas. That 25-foot maximum length should be reduced by 2 1/2 feet for each 45 degree bend in the ducting, and by another five feet for each 90 degree bend in the vent duct. 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. However the installation instructions and recommendations from the individual clothes dryer manufacturer are the final authority on how the dryer should be installed. Plastic duct is not a UL approved dryer duct material, not code approved and its use will void any dryer manufacturer warranty." Irrespective of the type of dryer vents, they are all made with the intention of using it for dryers. (Fantech 2012). If space is tight between the dryer and the wall, a periscope vent allows the dryer to be 2 inches closer to the wall. sloppy bending flexduct runs significantly reduce the performance of the vent fan. Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. Double-check to make sure that this type is approved for your dryer and allowed by local code. I am trying to find out what size periscope … FREE Shipping on orders over $25 shipped by Amazon. 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. Foil duct can accordion from about 1 to 8 feet, which is usually enough for most installations. Because all types are sold for use with dryers, you would naturally assume that all are suitable for this application. Second connect the Whirlpool 4396037RP Vent Periscope – Slim Body. 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. UPDATED RANKING https://wiki.ezvid.com/best-periscope-dryer-vents Disclaimer: These choices may be out of date. 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. What's wrong with using this material at a clothes dryer? It has a wide rectangular shape except for the two ends where it connects to the dryer and the vent outlet. Connect the flexduct to the fan itself using The through-roof vent approach gives us another roof penetration, a possible leak spot, and it almost assures that condensing moisture will drip down the vent duct and into the building ceiling. The outlet on the wall to the outside is above it. Install a secure, self-closing screened exhaust vent cover  - the vent hood, outside the building at the end of the clothes dryer vent line in order to prevent rodents or birds from entering the ductwork. If you add 8 inches for each end it would be 30 inches. 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. Above: I'm checking a two-louver dryer wall vent hood that is somewhat resistant to lint clogging. Clothes dryer exhaust vents should be directed to the building exterior. Flex-duct: plastic & wire flexible dryer vent duct (photo at above-left), a coil of spring wire covered with a thin, usually white, plastic. I had 3 Geek Squad installers for the new washer and dryer (separate trips for various reasons) and none of them recommended the periscope vent kit. 4.0 out of 5 stars 591. This is often a problem since dryers tend to be tucked away into small areas with little room to work. 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. If the dryer vent is blocked, the dryer operates at higher temperatures. Do not use regular plastic duct tape because it dries out and deteriorates. We include a list of clothes dryer fire safety hazards and other clothes dryer installation or maintenance mistakes that are either unsafe or that interfere with effective, economical dryer operation. First, you get a technician with 48 inch arms, with a diameter of no more than 3 inches. "The 2012 International Residential Code (IRC) is pretty specific when it Provide one or more dryer vent duct inspection access points at which you can disconnect and open the dryer duct system for inspection and cleaning. And we prefer rigid, solid metal dryer vent ducting wherever possible. Exhaust vent must be securely fastened to a noncombustible 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. 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. 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. Periscope-style dryer vent pipes are thin and inflexible, which offers two distinct benefits. 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. Get it as soon as Wed, Nov 18. or leaks into the structure. A dryer vent periscope can come in handy for connecting the two. Dryer Vent Hood - Through-the-wall gas or electric dryer tube and vent hood with a removable bird and rodent guard. 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. Some of these factors are the material type, size, flexibility and rigidity among several other factors. 4.0 out of 5 stars 534. 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. Watch out: some manufacturers recommend against using sheet metal screws to secure dryer duct sections because the screws collect lint. The preferred or most-recommended dryer vent routing is shown above, adapted from Whirlpool dryer vent instructions cited in detail below. The dryer vent joints are secured with foil tape. The exhaust on my dryer is at the bottom. 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. [Dryer-Ell is at http://dryer-ell.com/ ]. to 64 ft, if rigid metal duct is used, and no 90° elbows are utilized (or up to 44 ft with two elbows). Also, dryers may come with the manufacturer’s specifications for ducting to use with a particular model. Most slim ducts can be adjusted from about 27 inches to about 48 inches in length. Other options New and used from $6.45. collect water and risk leaking into the building. The periscope dryer vent duct is also suitable for usage in small areas and it also comes with a solid vent duct that is capable of being extended whenever it is necessary if you want to connect the dryer’s exhaust to your outside vent. It has a flexible body just 18 inches long. To get started, we pulled our dryer away from the wall and disconnected the duct from the dryer and wall with a flat head screwdriver. 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. Inventory is sold and received continuously throughout the day; therefore, the quantity shown may not be available when you get to the store. Plastic duct is the least-safe option, and you will not find a listed product made of this material. The Spruce uses cookies to provide you with a great user experience and for our, Installing an Over-the-Range Microwave Oven With Vent Fan, Routine Dryer Vent Maintenance Can Prevent Fires, How to Install a Dryer Vent in a Tight Space, Some Easy-To-Use Tips That Will Reduce Basement Condensation, How to Disconnect, Move, and Install a Clothes Dryer, How to Reduce and Remove Lint From Clothes and Upholstery, How to Clean Your Dryer Vent and Reduce Fire Risk. We discuss types of dryer vent ducting and dryer vent doors or opening protection devices. Shop periscope dryer vents and a variety of building supplies products online at Lowes.com. CLOTHES DRYER VENT INSTALLATION at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. You may need to be a little creative to attach everything together. comes to dryer exhaust venting. It is made from flexible foil so it can be folded up when it is not in use to save space. InspectAPedia tolerates no conflicts of interest. 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. 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. It allows you to push the dryer very close to the wall. Shop periscope dryer vents and a variety of building supplies products online at Lowes.com. The best way to ensure a duct is safe for your installation is to look for a product that is listed, or certified, by a national testing laboratory, such as UL (Underwriters Laboratories). I had to buy 2 connector to get the job done because the connectors on the periscope just aren’t long enough. Along with trash, debris, and other water entry sources, this crawl space was a moldy mess that had led to wet building insulation, mold contamination, and damage to the structure. That duct caused the dryer to stick out about 6 1/2 inches from the wall. Get daily tips and tricks for making your best home. 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. The periscope clothes dryer vent shown is distributed by Whirlpool and depending on size can be purchased for about $20. Building codes often specify "listed" or "L and L" (listed and labeled) duct for all new installations. Foil duct is held in place with dryer clamps or large hose clamps. Periscope dryer vent ducts allow you to vent the dryer without flexible ductwork. I found a “periscope” dryer vent that has a 2in width to it when inserted into the dryer. 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. 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. Watch out: we have found serious and chronic lint clogging of louvered dryer exhaust vent hoods IF the hood uses multiple louvers that are small in width. Metal ducts, having a smooth interior surface provide these advantages when used on clothes dryer systems: Above: an angled clothes dryer exhaust vent hood. Two other types: a box hood that is quite similar, and a louvered hood are also provided. Where space is limited, an adjustable offset dryer vent is used. We secure connected dryer vent duct sections using metal foil tape at each vent section. Additional roof top dryer vent photos below illustrate a vent that became lint clogged and that was snow-covered (and blocked) in winter. Periscope dryer vents are usually telescoping in length and sold in ranges such as 0-18" tall, or longer. Get it as soon as Wed, Dec 2. U.S.D. It has a wide rectangular shape except for the two ends where it connects to the dryer and the vent outlet. As the dryer is operating, the lint, moisture, and heat are vented into the bucket. [2][4][5][6][7][8]. But the variety of materials and duct prices can fool you into making a bad or even a dangerous choice. Preparing the Offset Dryer Vent . 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. 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. An exception to this length reduction for dryer vent elbows may be permitted for large-radius bend dryer vent products such as Dryer-Ell®. (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. This approach violates manufacturer instructions and is unsafe. 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. 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. 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. mobile home. Keep all connections tight and avoid air leaks. 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. 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. Indoor dryer vent buckets contain water in a bucket, to which the dryer vent is attached. This is especially critical in long dryer runs through ceilings and walls where the risk of blockage and fire would be increased. So we reviewed, best dryer vent hose for tight space. Other options New and used from $7.62. We include a table of the tempeatures that occur inside of clothes dryers at different places in the equipment and in its venting system and we describe unsafe dryer operating temperatures.
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