iPower 4 pollici Backdraft Shutter Damper Back Draft Blocker, flusso d'aria unidirezionale inserto antiriflusso con 2 lame pieghevoli caricate a molla in linea, 4 ", sfiato dell'estrattore HVAC, cappe da cucina 4" Backdraft Damper

Brand:iPower

3.5/5

€
39.28

Ampie applicazioni: le valvole controcorrente possono essere inserite in condotti di ventilazione flessibili o non flessibili. Progettato per l'uso con cappe da cucina, ventilatori da bagno, cucina e altre applicazioni HVAC domestiche. Indispensabile per la ventilazione HVAC. Materiale: l'ammortizzatore Backdraft da 4 pollici è realizzato in acciaio zincato, le alette sono in alluminio, mentre l'asse e la molla sono in acciaio inossidabile e possono resistere a temperature da 14 a 140 °F. Inserto del condotto del flusso d'aria unidirezionale: la valvola di riflusso con 2 alette caricate a molla impedisce il movimento del flusso d'aria inverso attraverso il condotto di ventilazione quando il sistema di ventilazione è spento. Tenere lontano dal tintinnio: ha una striscia di schiuma interna e una molla a scorrimento regolare per evitare che le ali della valvola scuotano. La posizione della molla dovrebbe essere orizzontale per le installazioni orizzontali in modo che possa aprirsi e chiudersi in modo ottimale. Alette della valvola leggere: le alette della valvola si aprono sotto la pressione creata dal flusso d'aria e poi si chiudono automaticamente con il lavoro della molla. L'aletta di riflusso si chiude automaticamente a bassi volumi d'aria. La serranda Backdraft è installata in modo che le pale della serranda si aprano solo nella direzione dell'aria in uscita.

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EAN: 0840166237205

Categories: Strumenti e miglioramento della casa, Materiali da costruzione, HVAC, Canalizzazione,

Customer Reviews	4.5 4.5 out of 5 stars 566 ratings 4.5 out of 5 stars
Item model number	4 inch Backdraft Shutter Damper Back
Item Weight	8.8 ounces
Manufacturer	iPower
Product Dimensions	4.92 x 4.92 x 6.2 inches

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Scritto da: DAC

Comparatively good value

I bought this unit and a significantly more expensive competing unit. This one is sturdier by far and it has 2 springs on the flapper vs 1 on the other. The big issue is that neither of them are accurately made so to get a good flapper seal there is a very wide foam gasket the flapper seals against. It seals well but this is a small duct to begin with and I calculate that the big gasket reduces flow area by a whopping 57%! This is a pretty big flaw but I only deducted 1 star because for my situation my fans move too much air anyway. If airflow is too restricted the flapper shaft on this unit is easily removed and I can easily trim back or replace with a more reasonable gasket.

Scritto da: Michael

Does what it's supposed to do

It does work but you definitely need a fan that's pushing a good amount of air. A lighter spring would have worked better for my application..

Scritto da: Amazon Customer

Really powerful

Only get this fan if you need to move a lot of air. It’s way more powerful than I expected based on other fans’ performances. It’s far from quite but I have it mounted to the foundation in the crawl space and don’t notice it

Scritto da: Interested Reviewer

Best specs for the price

Great specs - best CFM and high temperature tolerance in this price range. It moves more air and can tolerate higher temperature than most other fans anywhere close. I got this to help ventilate an attic, but it is installed in an area that does not get as hot as where it's helping ventilate. Unfortunately, my first one started squealing after only 2 days and had to be replaced. This was handled hassle-free by Amazon. I realize there is a certain expected failure rate coming out of manufacturing and I may have just gotten a bad one through luck of the draw and will update this review either up or down from the initial 4 stars based on how long the replacement lasts. TIP: When mounting, use rubber or nylon washers to help reduce transmitted vibration. Also you can't really get a screwdriver lined up very well from above, so consider either running the screws up from beneath with lock-washers on top, or use hex-head screws so can use a tool to hold the top still better while you tighten your washers beneath. Pay attention to the arrow which indicates the direction of air flow. When choosing whether to push air in or pull air out, consider the overall airflow of the space and whether you want to create a positive or negative pressure. Many will default to using such a fan to pull air out, but in some cases you could be better off pushing fresh air in and letting that force out the existing air. What is safe and appropriate depends entirely on your application and you should consult local building codes.

Scritto da: Legal Eagle

Pretty noisy

After 10 years of continuous operation, the old Hurricane fan started making some noise, replaced with this and even new it makes as much sound as the old fan. I'll leave it in because the location is a MF to get to. Not silent, makes a humming sound that increases with speed. There is a warning about using a speed control that I was not able to translate well, it works but makes noise at every setting.

Scritto da: Lon Howze

Incredibly powerful and nearly silent fan

I used this as an inline booster to fix an A/C problem that I have been living with for years. I installed this fan in an attic space closet where the ductwork was exposed. I was worried about noise, but when I turned it on it was virtually silent. I also bought a speed controller - thankfully because at top speed this thing move a LOT of air! I usually keep it on the lowest setting and it does a phenomenal job.

Scritto da: Surveyor Skip

great air mover for the money

Great solution for my application. I'm moving hot air from the top of a cathedral ceiling to an unheated room in the back of the house. Works well with a 120v thermostat control. The fan noise is noticeable, but not overly loud. The installation was a bit of a pain. The mounting flange is behind the body of the fan with only enough room for a box end wrench. Mounting on wood framing requires lag screws which must be pre-drilled and painstakingly twisted into the wood with a hand wrench. Not even enough space for a socket and ratchet. the mounting bracket needs to be redesigned to extend beyond the fan body for easier installation.

Scritto da: Gorignak

I have 4 of these

50 years of heating with wood !! I have moved air in every economical way possible. I have defaulted to these an several large wood stoves to heat 6000 sq ft. of shop. Another circulates the house. If these are located under a house they can barely be heard. Locate them midway in a pipeline if possible if pulling air off a wood heater so the air is tempered a little. We monitor the pipe temp..... round 8" metal duct .... of the air near the blower and keep it below 155 F . These units are rated 170 F. There is no better/cheaper/economical/available units than these. The temperature in the shop instantly equalized. These move lots of air at good static pressure. We pull through about 3" of filter also. Our electric bill dropped noticeably over the old 1 hp 14" squirrel cage blower we used before. AND, we received one that was out of balance. When I requested a return....IT WAS HERE 20 HOURS LATER. These folks treated me very well .... THANKS.

Scritto da: Brad

Waste of money and no warranty for canadians.

The media could not be loaded. Oh hell no, i was being modest at first because I thought I spent $80-90 on this fan but after reviewing and seeing the price, for almost $200 this product sucked, not even a year later and not even run every day and it's starting to make loud clunky banging noises, checked out the warranty and it doesnt even cover me because I'm in canada. But that being said they make you not want to return the product, all the hoops and shipping (both ways) you have to pay for because of their faulty product, this is a waste of money. Spend a bit more and get a fan with a good five year warranty, I didnt even realize this company doesnt even stand behind their product otherwise I wouldn't have even purchased this one. Cant believe I didn't spend just a bit more to get a way better product. **update** unplugged to add straps to hang it from because of how much noise there was and now it fully stopped working. Enjoy the video, unplugging and plugging it back it and having it not work.

Scritto da: Amazon Customer

This thing didn't even last a month

I've been using it as an intake for my grow room. Today when i checked on my girls there was a burning smell coming from the intake i followed it back to this fan. What a waste of money. I installed it Jan 20 and its been exactly 30 days I really shouldn't cheap out on ventilation. It could mean the difference between a burned down house or everyone knowing what you do

Scritto da: Dan Erlich

This thing is a miracle..

I used this for central AC air circulation in line in an attic based air handler.. it went in FAST and easy, it moves a huge amount of air quietly... in our case so quietly that I attach a ribbon to one of the air registers to be able to tell when it is running.

Scritto da: svtcontour

Mine developed some bearing noise after only 6 hours of use

While the noise was slight, its unbelievable to me that it should do that so I've packaged it up and its being returned.

Scritto da: Wil

Works well

It definitely sucks the air out or in. You will want to buy a fan speed adjuster. Noise level sounds like an outside air conditioning unit. It's reasonable. Great way to air out a large area