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Air ducts are noisy

\015 The air ducts in my central air coditioning system are noisy. I'd like to know why and if there's a way to fix it.\015

Answers :

Most folks when talking about noise means it's coming from the return air or intake. Is this correct? Please advise.\015\012\015\012RepairUSA
Many heating/cooling ducts are metal, so they conduct noise quite readily from the air-handling unit to your rooms. To break the conduction of sound, you can have a heating contractor insert flexible insulation ductwork between the heating/cooling system and the ductwork runs.\015\012\015\012If you hear a pinging or popping sound coming from the ductwork, this may be caused by thermal expansion or by air blowing past a loose flap of metal. Track along the duct runs, listening for the sound. If you find it, make a small dent in the sheet metal to provide a more rigid surface that?s less likely to move as it heats and cools.

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Air ducts are noisy


Most folks when talking about noise means it's coming from the return air or intake. Is this correct? Please advise.\015\012\015\012RepairUSA ... Haier Energy Star ESA3183 Air Conditioner

I have an air exchange system in my house. I also have a dehumidifie set up with it to remove the humidity in my house. I want to make sure he set up the system correctly. He has the fresh air going into the air exchange and it ducts out to a "T" duct. fresh air goes to the house and also goes to the dehumidifier. the dehumidified air goes to the air exchange to a "T" duct that is mixed with the stale air from the house and is connected to the air exchange that appears to go through the air ex


Hello. Reading your description of the air flow patterns, it appears that you have good reason to be questioning this installation. All of the dehumidified air should circulate through the house. I recommend that you contact the company that insta ... Air Conditioners

Just Installed a Dometic Rooftop air conditioner I Have 2 supply ducts that feed each end of the home the supply duct are not putting out any air when I took the cover off the unit seems to be blowing out a sufficient amount of air but am wondering how the air is suppose to get into the ducts


Usually in moble homes the air flow has terrable air restiction in most cases this is compansated with higher volumes of air flow (your gong to have to increase the blower fan speed to compensate. hope this helps ... Dometic Rooftop RV Air Conditioner

I would like to know while designing of duct how will i calculate the cfm Air discharge in units like CFM through a collar opening? What is the formula for giving the collar size for air discharge. Lets for Example I have a AHu of Capacity 1200 CFM I have to distribute the total cfm equally through duct on three seperate room . then what will be the duct collar opening for each room so that each room will get 400 cfm each? RegardsM.A.Shah09314545556


You'll have to pay for that info.. ... Air Conditioners

Have a RV Dometic Duotherm 13.5K Brisk Air Conditioner, Model No: 57915.331C. Have a ducted air conditioner system. Using Dometic Quick Cool Ducted Return Air Package Model No: 3105935.039. What is the correct Control Unit to use with this system?


... Dometic Air Conditioners

Airflow We have a new ducted PEH-MYB reverse cycleairconditioner. We set the temperature at 20 degress for heating. Once it reaches it it then blows out cold air. We have had someone come 4 times already to fix various problems. It is not nice to sit near a duct and feel cold air. I thought the air flow was meant to stop, then start uo again when the temperature dropped just like our gas heaters? Am I wrong?


Go to www.mrslim.com. Look under the tab for library. Ib there you will find the troubleshooting guide for this model. Make sure the remote is set for cool and make sure the fan setting is not on automatic. ... Mitsubishi Mr. Slim MXZ30TN Air Conditioner

I have a Lennox heating and air system. It's 5 years old. The tape that hold those long tube things together has failed and the tubes are disconnected from the vents that blow air into the house. I have used duct tape as a temporary fix. I'm told that when winter comes that my duct tape will come apart. Where can I buy the right tape to put everything back together? I have tried to get contractors to do the work, but so far they are all booked up for weeks. My electric bill is sky high probably


Sounds like a lousy job. Best tape is alluminum. You can pick it up at Home Depot or Lowes. If the tubes are flex duct be sure to pull back the outer insulation and tape just the inner lining ... Air Conditioners

I have a RV Dometic Duotherm 13.5K Brisk Air Conditioner. Model 57915.331C I have a ducted system. Using Dometic 3105935.039 Quick Cool Ducted Return Air Package Shell. What is the proper Control Unit to use with this system?


... Dometic Air Conditioners

I have a 4-ton Frigidfaire air conditioning unit on my 2400 square foot home, but I am not receiving the cooling I should receive. My split system model is #: FT4BF-048K. My air handlers Model is #:B4VM-X48K-C. I suspect my problem may be duct size. What should be the sizes of supply and return ducts on this unit? Phone 941-776-9270.


Hi, the ducts are 18" round at the beginning and branch out to smaller sizes for other rooms. 10" for living areas, 8" for bedroom, down to 6" for bathrooms if they have them.If this unit was just installed, I would recommend getting the contractor o ... Frigidaire Air Conditioners

Noise I just bought the 8000 and 10000 BTU Frigidaire air conditioners just before my move and have found that they are very noisy (especially the 8000 BTU unit). The sound of the air flow is very noisy and the 8000 BTU unit also seems be have a slight irritating whining noise. I was thinking about taking out the three screws I saw on the side of the unit in hopes of getting the front off and attaching some cloth or something inside to make it quieter. Since I have now moved into New York City a


Adding cloth or any other sound absorbing material will not work. There is not enough room to add anything appreciable in the fan area. ... Frigidaire FAC107P1A Wall/Window Air Conditioner

No air is coming through air ducts


The cover has a filter incorporated, clean the filter and see if it works. it might be so dirty it looks like a black sheet. the dirt is normal, if is filtered from the air we breathe and usually comes from car exhaust gases etc ... Dometic Rooftop RV Air Conditioner

Air handler Is a 3 1/2 ton air handler too big for a 2 1/2 ton air conditioner? air conditioner FT3BA 030KA air handler B3BV 042k BB Also duct work in garage has a gap bringing in air from garage.


Yes and that's dangerous as fumes and exhaust may enter the house ... Air Conditioners

I have a new motorhome and the air conditioner only reduces the inside air temperature by 2 degrees on a hot day. e.g. outside air temp 26 degrees inside temp 29 degrees. After 2 hours of a/c running with door and windows shut inside air temp is 27 degrees. Dealer says the air conditioner is ok as air coming out of ducts is 3 degrees as required. I believe a larger a/c is required.


Can you tell me what size/make of motorhome you have? Certainly doesn"t sound right to me, and I've been working on them for over 15yrs. Whether it's a 13,500 BTU or 15,000 BTU, it should be plenty as long as motorhome has any insulation at all. I a ... Dometic Rooftop RV Air Conditioner

Duo-Therm Brisk Air Model 59516.601 Ducted Roof Air w/wall thermostat


First of all, I think you mean 110 volts on your meter, not amps, just so we're on the same page. It sounds to me like you may have a capacitor problem on your compressor. I'll try to see if I can find you a part # if you have someone very experience ... Dometic Rooftop RV Air Conditioner

I have had a new honeywell humidifier installed. The problem is the control H8908B. HE INSTALLED IT FIRST TIME ON A DUCT RIGHT NEAR THE FURNACE AND IT FEEL OFF . Melted . Then came in and moved it away from the furnace but still on a heat vent and the same thing happened 2 days later. It appears that it should go on a return duct upsream from the humidifier. Can it also be mounted on a wall. By just felling the ducts when the furnace is on can I tell which is the return air duct ? Thanks for yo


After the air leaves the fan ,this is called supply air ,before the air enter the fan which sucks air into the fan --- on the flter side --is called the return air! ... Honeywell Air Conditioners

I Want To Measure Air delivery of ceiling Fan 48 in. I Use Digital Anemometer. I Made A Metal Duct Of Dia 56 in & 36 In Ht. I See Difference in Air Velocity At Diff Points . How Do I Get Avg Circle Area & Avg Air Velocity To Cal.Total Air Flow In CFM. Vijayraj Bankapur


The vol. of room is 1230 cft. pl. suggest suitable size of ceiling fan ... Carrier Air Conditioners

After a cooling cycle, when the thermostat call for more cooling, it take up to 5 minutes after the air handler starts for the compressor motor to restart. The top fan operates on the outside unit, but since the house is not circulating cold air, only the room tep air the house heats up about 3 degrees before the compressor comes back on and cool air begins to come from the ducts. Yes. I know there is a safety feature to protect the compressor, but can the cycle be shortened?


No, this cycle cannot be shortened due to the simple fact that this feature is in place to protect your system. Even if it could be, I wouldn't recommend it.Mat ... Coleman Air Conditioners

I have a Dometic 15,000 btu, ducted air conditioner in my 30 ft fifth wheel. It seems like the unit has never cooled very efficiently. Dealer has checked out. I noticed yesterday, outside air over 100 degrees, that the air conditioner would put out good flow of cool air, but once in a while compressor would stop running even though not close to thermo setting. Fan would continue running. Any suggestions?


Not sure what the pressure sensor should ohm at but i would suspect a faulty sensor if everything else checks out. Its very common for these sensors to exhibit issues when they get hot. Also you may have a filter in the system that may be restricte ... Dometic Rooftop RV Air Conditioner

I have a weather king model 90RJ - first time I've had hot air heat..When I turn on the heat, the blower turns on right away ( blowing cold air) - I understand that the ducts have to cleared of the cold air - but shouldn't the blower turn off until the air is warmed to temp thanks Bob


When the furnace first comes on there is a induced draft motor that should come on first but that forces air up the exhaust or flue,not into supply air on ductwork. It is not unusual for cold air to be blown out when burner first turns blower motor o ... Weather King 10AJA3001AH Air Conditioner

My name is stephen zimmerman I live in an apartment townhouse with approx 1100 sq ft. we have basement, 1st floor living room, half bath, kichten. there are 2 intake duct and 5 out put duct. floor 2 up stair has 3 intake duct and 4 output duct. the furnace is a fedders nat gas model 080n2d, ser fg776908. has a 1/4 hp motor. my ? is the ac temp on 1st foor coming out is 45 deg and on floor 2 ac output temp is beteen 53 to 57 deg and very little air . I have try vent fan and no good. what could


Hi,\015\012\015\012Your central air conditioner may have been installed by a contractor who doesn't realize that hot air rises and cool air falls.Successfully installed central air conditioning can easily cool two story houses.\015\ ... Kenmore 70088 Air Conditioner

Carrier Air Conditioner Infinity System - Air Handler Sweating & Duct Work Condensation


If its an infinity. check and make sure you have a proper charge and no air infiltration from attic. also check blower speed on your humidity control in the controller set up ... Air Conditioners

My wife turned off our A/C units acouple of weeks ago while we were away on vacation. Not they are both acting up. The fan is turning and moving air through the exchangers outside, the little red pressure switches are not tripped and the fans are moving air through the ducts inside as well. However, the air is not coming out cool enough to drop the house temp from either of the units. I tried the thermostat reset buttons, checked my filters, (they're clear) and my cooling coils are not iced over


Looks like the compressor is no getting ON.Check thermostat . Bye pass the thermostat and try. Check compressor relay. Compressor capacitor. If thecompressor running and there is no cooling, check the current consumption ... Air Conditioners

Ok..here's one. I have entire air duct system that is condensating ON THE OUTSIDE, UNDERNEATH. I noticed the problem before and after cleaning the coil in a closet air handler. Air runs fine, cools normal. But this condensation baffles me. It is even on the plenum! The pipes seem wrapped fine, and the plenum is good to go as well.


Not moving enough air or duct work is in a unconditioned space and needs to be insulate. what are your freon pressures, suction and liquid line temps, and indoor wetbulb ... Air Conditioners

I have a Mitsubishi MS-09D wall mounted air conditioner. The cooling function does not seem to be cooling. The fan is running but the it seems to be recirculating the air only. The defrost light is red on the wall unit. I don't recall this light ever being on before. Could a button or combination of buttons on the remote unit have been bumped somehow? Could you please tell me how to reset the remote control or wall unit to have the cooling operation to come on again? The air ducts are clean,


... Mitsubishi Air Conditioners

I need parts for everstar portable air conditioner MPM1 model --- need 1) Adaptor A (for permanent duct-mounting) part # 2112509065; 2) air outlet pipe tie-in #2112509064; 3) air outlet pipe #2112500013 ... as listed in the owners manual


I have lost the exaust tube and the attachment that hooks up to the back of the unit to the tube. Where can I buy these parts? ... Danby DPAC8020 Air Conditioner

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