How to address loud cold air return

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Return and cancellation policy: If you wish to return an item you must call for instructions. Items returned without authorization will be refused. Keep the original packing and invoice. Items must be returned within 30 days of receipt, and be fully insured. Shipping charges are not refundable. Returns sent to the wrong address, either through customer error or through the customer not calling for instructions will incur additional shipping which will be passed long to the customer in the form of a reduction of the refund amount. Full credit will not be issued if item is missing parts, shows wear, is not in resalable condition, or has been damaged. Items that were damaged by your shipper are not eligible for refund. You will need to collect compensation from the shipper yourself through the insurance coverage you purchased from them. In that event, we will hold the item for 6 months in the event your shipper wants to inspect it. Some items are not returnable including all...

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I had a fan added in my bathroom. Surprisingly there wasn't one at all. When the fan was first installed they had it venting into the ceiling. It was a .5 sone fan and you could hardly tell that it was even on. You had to listen closely. After I noticed it was only venting in the ceiling I had them come back out and add the vent out to the outside. Now all of a sudden this thing is pretty loud.

Is there anything I can do to quiet it down? Is there something I should be looking for? It's amazing how loud it got by adding the vent.

There more restricted the airflow is, the more noise there will be. All contributing factors to noise:

Diameter of duct (larger is better) Overall length (shorter is better) Number of turns/bends (fewer is better) Radius of turns (larger is better) Size reducers used (no reducers is better) Type of duct (smooth, rigid is better than flexible) Type of exterior vent hood (low resistance opening is better for noise)

This is why the low...

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I have a central A/C unit inside of a closet with the return air below the unit. There is an unusually large amount of noise coming from the return air and the intaller said that the only recommendation he had was to install acoustic tiles inside of the return air chamber. Will this make a significant difference? Are there any other options? Thanks. Accoustic tiles in the return plenum??? Just when I thought I'd heard it all. How about a proper sized return with a well-sealed unit? Returns should have some ductwork attached to them. I am not sure anything simple is going to reslove your air noise issue. You could try accustical tile but they better make sure it doesnt reduce the return path. you ain't smokin' it works.

Retired tech, son works here. Bought a small house, we put in a 60K 90%. Built a box under it, return is 1 large grille pulling from that box. He lined the box with accoustical ceiling tiles, barely a whisper.

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Posted By: clope okay, thanks for your patience...here are some pictures of the set up maybe you can point some things out to me because i'm kind of dumb.

#1 http://i161.photobucket.com/albums/t217/clope_photos/Filters.jpg

these are the only filters i see.(I14x30 and 14x36)..are there more? can I just cut out a new return here? there is a free space to the right of these filters. I count 9 vents in the ceiling that blow air out...these suck air in.

#2 http://i161.photobucket.com/albums/t217/clope_photos/IMG_6004.jpg

this is the view from under the furnace...is this hole too small?

#3 http://i161.photobucket.com/albums/t217/clope_photos/sideview.jpg

this is the view from 1 filter to the next

#4 http://i161.photobucket.com/albums/t217/clope_photos/IMG_5999.jpg

this is the view looking down under the furnace

#5 http://i161.photobucket.com/albums/t217/clope_photos/pipebehindfurnace.jpg

some pipies that lead to the attic...

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There are a number of reasons a window air conditioning unit is not blowing cold air. From a dirty filter to simply being worn out.

So lets take a look at some of the top things to look for when a unit stops blowing cold air into a room.


Dirty Air Filter

All air conditioner units needs good air flow to work properly.

A dirty air filter can block air flow and cause a unit to stop working.

The air filter is usually placed inside the front cover and each unit has its own way to replace or clean it.


Clean the Outside Fins of any Debris

The outside fins are there to dissipate heat as a fan blows air though them much like a radiator in a car.

If the fins become clogged they can stop dissipating heat and the unit will stop working.

A quick way to fix this is with the unit off use a hose to blow out anything that may be blocking the fins.

Be careful...

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Does air conditioning cause headaches? Unfortunately, for some people the answer is yes. AC is a necessity during the summer in many parts of the country, but too many homeowners and office workers pay the price. Read on for some reasons why air conditioning could be causing your headaches and ideas on how to solve the problem.

Dehydration, Noise and Chemicals

There are a variety of reasons why air conditioning could cause headaches and contribute to your discomfort:

Dehydration: While the air conditioner is cooling off the air, it can also draw all the humidity out of it. This is great up to a point, but if the air gets too dry and you don't consume enough water, you can end up with a dehydration headache. Combat this effect by running a humidifier in conjunction with the AC and making sure that you drink plenty of water during the day. Blood Vessel Contraction: When you get too cold, the blood vessels in your brain can contract, which is one potential cause of...
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This time of year, especially when it gets cold outside in the evenings, we get many calls from homeowners concerned that there is cold air blowing out of the duct registers in their home when their heat is running. We wanted to address this, as many times homeowners think this is an issue with their heating and cooling system, but if they have a heat pump, it's actually typically a very normal process.

Don't know if you have a heat pump? Check out this article, on how to tell if your unit is a heat pump or air conditioner.

Let's understand the basics of how a heat pump works:

In the summer, a heat pump picks up the heat in your home and dumps it outside.

In the winter, your heat pump picks up heat from the outside and dumps it into your home (yes, even when it's cold outside). Now, that may be hard to grasp, but this is the way it works.

In the summer, your indoor coil is cold (and pulls humidity out of the air, and comes in the form of water)...

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Your HVAC system's air distribution network consists of two distinct sides: supply and return. Both sides must be fully functional for reliable HVAC performance, which makes it critical to keep your cold air returns unobstructed so air can flow unrestricted through the system.

The Role of Cold Air Returns

Air isn't pumped out of your return registers, so you might wonder how they work. The function of the return side is fairly simple: cold, stale air is drawn into the ductwork through the return registers, it's pulled through the air filter, then it's delivered to the HVAC equipment where it's reconditioned.

Why Having Unobstructed Cold Air Registers Matters

If your HVAC system is new, your home may have several return registers. If your system is older, you probably have supply vents in every room but just one return register per floor. In this case, a single obstructed return grille can severely restrict airflow through the HVAC system and lead to...

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I apologize in advance for lack of my knowledge about HVAC systems and sorry for the long posting. I am trying to provide as much information as I can.

This is my first home and I moved in to this home in February 07. It is about 3500 sqft home with 2000 sqft in the first floor and 1500 in the second floor. It has two HVAC systems. First floor unit is in the basement and the second floor unit is in the attic. The first floor has 12 air vents but only one cold air return in the hallway. The HVAC unit is right underneath the hallway in the basement. The cold air return is connected to the unit with a big circular shiny metal duct about 2 feet in diameter. This duct is about 15 feet long in total with two 90 degree bends.

The cold air return is exceptionally noisy. It sounds like a giant vaccum cleaner. The noise level is same with furnace(winter) and AC(summer). When it comes on, it is really scaring little kids if they are near the duct. Because this is a new house, builder is...

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Thanks for all the responses. We have all new duct work when the system was changed out , everything was gutted as the original job was so bad. I have never seen a 4" filter. I don't think anything like that would fit as the 1" sits right against the metal framework inside the return.

I have seen the reusable ones and wondered if anyone has those...you evidently clean them and replace. As far as loud it is the air noise...no banging LOL.

David the problem with the cheap filters and the fact that yes they last and last and don't look dirty is that indeed they let everything through :). I have tried them at our last house and stopped as they never looked dirty and the " expensive good ones" did...so there you have it. The reason they don't get dirty is they don't catch the dirt...at least in my house.

We have gas fireplaces and we burn candles and we have a gas cooktop...with all of that my husband says that is the black that I see on the filters...he says that...

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In homes with a single central return-air grille, return air often struggles to find its way back to the furnace. The result: room-to-room pressure imbalances that lead to uneven room temperatures, comfort complaints, higher energy costs, and even moisture problems in walls and ceilings.

When a furnace comes on, heated air is pushed through supply ducts to registers in each heated room in a house. If the forced-air system is properly designed, the house includes return-air ducts to convey air back to the furnace to be heated again, in a kind of continuous loop.

While most HVAC(Heating, ventilation, and air conditioning). Collectively, the mechanical systems that heat, ventilate, and cool a building. contractors install ducts and registers to deliver conditioned air to every room in a house, they often neglect to provide an adequate return-air path from each room back to the furnace. Most rooms don’t have a return-air grille; instead, there’s often just a single large...

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