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Is it a bad idea to use flexi insulated duct with a heat recovery unit or is it ok to use flat pack and round duct

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Where about do you want to put this on if i may ask?
I will be able to help you then..

Thanks
Wouter...

Posted on Sep 10, 2008

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1 Answer

My ventalation is sweating


The lines/duct needs to be insulated.

Jul 10, 2014 | Air Conditioners

1 Answer

The blower starts before its warm and it blows cold air for about 30 sec when its shutting down .


When any unit 1st come's on, you'll always have some cold air that's in the ducts that will blow out before you get warm air. If your duct work is uninsulated in a cold basement or crawl space then it will be even more noticeable. When the unit is heating from the Heat Pump mode, it takes a little longer for the gases to get warm enough so you'll fell heat. When it gets cold enough for the unit to switch from heat pump to the gas or electric heat source, you'll get warm air faster. If you have gas heat, some Thermostats have an anticipator setting for the gas valve. If it's set wrong it will effect the on/off cycle of the gas valve.
All duct work in non heated and a/c spaces, including inside walls,above dropped ceilings, in attics and crawl spaces, must be sealed & taped at the seams and joints and then insulated and taped.
Most new construction has solved that problem with insulated duct board, flexible insulated supply's and special tape.

Dec 12, 2013 | Rheem 13PJL30A01-RHLLHM3617JA 2.5 Ton 14...

1 Answer

Hi there, I have two Fujitsu DC Inverter split units to heat my flat (england). The temperatures have dropped significantly -2 and below. This causes the outlet pipes to freeze up and when the units...


Normal cool temp 23 to 25 and heat mode 29 to 31. And regrading defrosting your pipelines no need any tray. You can insulate with Armaflex tube which is mostly used for best insulation. Hope there won't be further water leak.

Dec 20, 2010 | Air Conditioners

1 Answer

I would like to buy the foam for the ducts?


You can purchase the insulation from a local A/C supply house or contractor. They will need to know the size of the pipe (OD diameter). The insulation that is exposed to sunlight can be protected (life extended) by loosely wrapping some duct tape around the pipe to shield it from the UV rays.

Apr 07, 2010 | Air Conditioners

1 Answer

The fan runs continuously, with thermostat set to


When was the last time you had the coils in the condenser cleaned. Dirty coils can insulate the refrigerant tubes, causing the fan to constantly run in order to try and cool down the refrigerant returning from the evaporator coils(a-coils) in supply ducting, But can.t because the condenser coils are insulated not allowing the heat to escape. I would try this first before replacing expensive parts. It is the small things that we overlook that is most likely the source

Aug 22, 2009 | Intertherm P3RA-048K Air Conditioner

1 Answer

COLEMAN MACH 3 MOUNTING ON INSIDE OF CAMPER NOT ALIGNING WITH MY


Did you purchase a new Ducted Ceiling Unit with the Upper Unit air conditioner? If you are replacing an older mach 3, the ducted ceiling packs are not compatible and you will need to purchase the ceiling pack as well. The ducted ceiling pack part number for the 8333 series Mach III AC is below.

1. Heat/Cool Air Distribution Box - 8330B735
2. Cool only ADB - 8330A733
3. Wall Thermostat (if needed) - 7330G3351

Hope this helps.

Jul 01, 2009 | Coleman Air Conditioners

1 Answer

Does anyone know if a Duo Therm model 620515.331c is ducted or not???


The upper unit itself is not ducted. They are all the same. The ducting is done with the lower unit or "Ceiling Pack" of the air conditioner. You need to see your RV is ducted, ie...vents in the ceiling that blow the are out. Usually they are round and mount into the ceiling. Another way to tell is if the unit has a wall mounted thermostat.

Hope this helps,

Jeff

Jun 24, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Ac unit cools entire home except for one bedroom


The issue may not be confined to airflow alone. An air conditioner makes us more comfortable through two basic rules of physics.
It removes sensible heat (the temperature you feel) and removes moisture from the air. Dry air enhances the bodies own cooling system allowing perspiration to evaporate more quickly which speeds the removal of heat from the body, this is why 85 and dry feels more comfortable than 72 moist degrees.

to ensure the ducts are balanced properly one must use an anemometer which is a tool used to calculate airflow by the pro's. Being that most homeowners do not have access to one there are some good observations to make using a pocket thermometer and your own senses:
  1. Ensure the guest room vent is the same size as the master bedroom.
  2. Ensure the supply duct for the suspect vent is the same diameter and approximate distance from the main plenum (where the ducts originate) as the master bedroom.
  3. Is the air emminating from the suspect vent approximately the same in volume as the master bedroom (does it feel and sound the same).
  4. The issue exists even if the guest bedroom door is left open.
  5. The air temperature measured at the vents is within 3-5 degrees of each other.
If 1 - 4 are true check for #5, if # 5 is false make sure the suspect ducting is insulated or covered well by attic insulation.

If 1, 2, 3 or 4 are false: Ensure the following:
  • The guest room ducting does not have a damper hidden under insulation or duct wrap.
  • The duct has not been crushed or restricted.
NOTE: internaly insulated ducts can be restricted on the inside by fallen insulation while appearing normal on the outside.

If #5 is false (issue goes away if the door is left open) the door may need to be cut off a bit more at the bottom or a grill installed to allow the air coming into the room a place to go.

If none of the above reveal the culprit concider the room itelf, it may have a higher heat load than the others.
A higher heat load may be due to dislodged, compacted and or wet insulation in the walls or attic, feel the walls and ceilings with your hands, how does it compare with cooler rooms?
If the walls and ceiling feel about the same and the tests above did not expose an issue its time to call the contractor back in, make sure the static pressure is checked in each duct a foot or so downstream of the the plenum and again just upstream of the vent. A duct with air pressure higher or lower when compared with the others could mean a variety of issues with the duct or where it connects to the plenum.

May 26, 2009 | Air Conditioners

1 Answer

Cold air coming from the intake of the central a/c unit. The unit is switched off and it is winter, so why would cold air come from the intake


Thanks for your question,
Just a couple of questions first, is your ducting insulated ? is there a fresh air intake on your system ? if either of these is the case, the first would be that you need to have your duct insulated, it is good practice to have them insulated as it will save you money down the road as to not have as much heat loss or cold air from the duct escaping into the home, second if you have a fresh air intake, alot of times that is where fresh outside air would be coming in from, there should be a damper on the venting, if there isn't I would suggest having one installed, normally it is installed on the return side of your ducting. Hope that was helpful, please leave some feed back as to how we did, thanks again,
mr.grzz

Jan 23, 2009 | Carrier XHB123D X/Y Series Heat/Cool Air...

3 Answers

Air ducts are noisy


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. If 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.

Jan 18, 2006 | Haier Energy Star ESA3183 Air Conditioner

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