If you’re about to have a wood burning stove or other appliance fitted then it’s very likely the installer will need to drill a hole through the wall behind the stove to ensure the product has sufficient ventilation. In this case simply provide them with the DR21 and request that they fit this instead of a louvered vent, they will be able to do this for you no problem! According to research over recent years, childhood asthma is caused by too much ventilation, too little ventilation, too much cleaning/dusting and too little cleaning/dusting. I'd take all of it with a big pinch of salt. And I say this as someone who developed asthma as a child. All I'm asking is whether there is a safe and simple method of stopping the cheap bits of plastic that pass for external covers on these things from rattling like a banshee whenever a squirrel farts in the woods to the side of my house. Also, you are missing the point of my question. I have not said the extractor fans themselves are especially noisy, just that the external covering vents rattle and are noisy.

DR21 Ltd is a family business, run out of my home-town of Knutsford, Cheshire. We’re a small company, but our product is made entirely in England and is manufactured ISO 9001:2015 standards. It was independently tested on the 24th October 2016 by BRE, one of the major facilities in the UK, and subsequently approved by HETAS. Your all need some good external grade glue, epoxy resin or something that will remain in place in low and high temperatures. Internal Super Glue will probably fail in winter temperatures. vi. In old properties is considered that there is enough ?leakage? so that a stove of up to 5kw does not require an air vent. Your DR21 vent cap also comes with comprehensive fitting instructions, we have these available for online viewing here: DR21 Fitting InstructionsSince no-one's said that you can't just tape the external vents shut, I'm going to give this a go. Depending on the effect this has on the draft, I may try putting some insulation inside the vent sleeve to help with this. Then I can happily use the windows for my ventilation, knowing that when I want a warm room, I can achieve it and when I want ventilation and air circulation it is completely within my control. Remove the standard louvered vent – you may need to unscrew some screws to do this, or break the sealant seal depending on how it has been fitted. Replacing underfloor air vents which will stop a draught blowing under your floor, while allowing enough air for the vital ventilation. Vent caps work best in conjunction with other draught exclusion measures to keep your home warm and comfortable. Take a look at our other draught excluders range to get an idea of some more cost effective ways to keep your home efficient and cosy, as well as reduce those rising energy bills. You may also like… The hole is 100mm, and yet the free air equivalent is 3400 sq mm. This is because the air vent sits on the outside of the wall, and does not reduce the size of the hole through the wall.

The DR21 acts as a like for like swap – you fit it onto the outside wall in place of the existing vent. There’s no fancy mechanism or any moving parts that could get damaged. Just an incredibly clever design that causes the air to move in a zig zag pattern, slowing the rate of air flow down when the demand for oxygen is low, instantly reducing those terribly cold air leaks. Smaller items will be delivered using Royal Mail 24. Larger items delivered via FedEx or ParcelForce. Hi, You said it would take 15 minutes to fit, and I did it in 7. And the effects were immediate!” B.T. Cardiff. It has a free air equivalent of 3400 sq mm, OK for a stove up to just under 12kw (if you include leakage 12 kw is fine) which covers most stoves fitted. Presumably by having 6inch wide holes that cannot be properly shut in so many rooms of our house, making it draughty, we run the risk of childhood TB and rheumatism and constant chest infections?Replacing a bathroom vent, such as the one with the flaps which rattle all night. Should be a straight swap. It cannot be used on a kitchen extractor fan and the fat in the air will rapidly clog the interior.

The unique DR21 vent is the solution ? this new product allows only the air that is needed to enter your room. Even a high wind or forced air won?t be a problem as shown in the video. At ?29.99 our unique patented vent will pay for itself in no time, as you won?t need to try harder to heat a draughty room.We get a lot of customers complaining about the draught that comes through air vents. The air vent is there to provide enough oxygen for your appliances when they are burning fuel. If they don’t get enough oxygen they produce carbon monoxide which is a killer. So the air vent is pretty useful when you’ve got a fire lit. But what about all the rest of the time, when the fire isn’t lit and there’s still a howling gale blowing through? Wouldn’t it be great to have something that restricted the air flow and prevented those annoying draughts? Ta daaa! We introduce the DR21, invented by David Gattie, a stove fitter with customers putting just such a complaint to him on a regular basis. Do you think I could tape up the vents upstairs by taking the inside cover (including fan) off, reaching through and applying tape from the inside? v. Combustion air can either be fed into the stove with a direct air kit through a ducting to outside or by taking air from the room. If the air is taken from the room then an air vent must be installed in the room in which the appliance is situated.

Most vents become a source of cold air and draughts are created as the fire draws the air from the vent.

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