Is your DUCTED HEATING system heating your attic/roof?
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- Опубликовано: 7 июн 2023
- Ducted heating systems use air ducts to distribute heated air throughout a building. The return air plenum via the ceiling in this video is responsible for circulating the cool or heated air back to the air conditioning system to be re-conditioned. The return air ducts must be airtight in the wall plenum to ensure the system operates efficiently and effectively.
In this video, the return air duct was too short and needed to be extended in order to make it air-tight a little lower down inside the return cavity.
Several negative consequences can occur if the return air ducts are not airtight.
Firstly, air leaks can cause the system to lose efficiency and pressurize your home as heated air escapes from the ducts before it can be circulated throughout the building. This can result in poorer indoor air quality, increased energy consumption and higher utility bills.
Secondly, leaks can allow unfiltered air from the roof space to enter the system. This can lead to a buildup of dust and allergens in the ducts, which can be circulated throughout the building and cause health problems for occupants sensitive to these particles, especially asthmatics.
To avoid these and other problems associated with air leaks in ducted heating systems, the return air plenums in wall cavities and ducts must be appropriately sealed and airtight. This can be achieved using Air barrier tapes, XPS boards, caulk products and other sealing materials explicitly designed for ductwork mechanical systems.
#Ductedheating #heating #energyefficiency
Air Tightness products
tighthouse.com.au
Air Tightness testing
efficiencymatrix.com 
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Fantastic information! Thanks so much.
Hi thanks for the information
I have the same issue in my home as well
What the hell is this? How does it pass inspection? This is a crime.
The same way unopened bags of insulation end up in ceilings, only to be discovered years later.
Canadian living in Melbourne. I get really cringey feeling how wrong heating system is in Australia. I ripped the whole system and installed like it’s in Canada where temps are sometimes -40s. I bill is reduced almost 30%.
1. Heat Vent on the floor level.
2. Intake vent on the ceiling.
3. Each room with same setup.
HINT: Warm air lighter than colder air.
One of the most common problems I found was that the return air duct(s) were too small. The system was virtually sucking air trying to make the system work. As it is starving for air it does not have enough to distribute throughout the house.
Recently I was building a house and the HVAC guy started running duct work. By luck I stumbled on the correct calculations and added a 14" additional return air duct and the system worked perfectly.
Took those same calculations and checked the home I live in and it was also "sucking wind" so I added another return air duct. The whistling stopped for the air intake. The rooms are now even heat/cool and my operating costs went down.
My suggestion is don't blindly assume the original design is correct. The other suggestions of being air tight are absolutely correct but in my case (2 out of two) the design was wrong and the systems would never have worked properly
For anyone wondering, the calculations are easy and there are tons of youtube videos on using a duct size calculator. If you have a few minutes and a tape measure it might be worth checking out (the city inspector will NEVER check this. I got my simple duct calculator from Amazon for about $10 and using it and making the changes will save me thousands of dollars in the future. No I am not an HVAC tech. I am a home builder focused on giving people quality homes for their hard earned money.
Blower door testing and air sealing are under appreciated tools for energy efficiency and comfort.
Why throw money away wasting energy month after month.
Just wondering what your thoughts are on the following situation. We have the gas ducted heating return vent in the floor of a cupboard however the air filter is in the door but the top half of the door, not the bottom half. Seems odd to me as the return is trying to draw air from the air filter space (which is almost a metre higher than return) and is also drawing from under the cupboard door. Surely this would make my system less efficient (as it’s going to so much effort to draw the air to the return.
Send us some photos of this. This sounds insane.
sales@efficiencymatrix.com
@@ecoevo done :). It’s definitely an ‘interesting’ setup!
How do I get this checked for my home?
Open up the grill and check it yourself.
So how does one test that your unit is installed correctly ?
Close all your doors and windows, run all your exhausts and see if you can feel any air come out of your return, with the back of your hand.
Australian building industry for homes is 80 % non compliant ,People sign off on anything these days that's the problem !!
Unbelievable shite! But still 28ACH is an unbelievable initial score and still 20ACH after the fix?? Yikes. Very leaky!
An energy efficient home or business is more comfortable and saves money in the long run.
Solar energy on your roof combined with battery storage can make people more independent from the grid and natural gas supplies. Add solar and supplemental electric heating or a heat pump for home heating..
Added insulation, triple glaze windows, energy efficient doors, energy efficient heating and cooling systems, energy efficient appliances, LED lighting, smart thermostats, solar panels combined with battery storage and a electric vehicle charger in the garage or car park. People are too focused on the short term costs and miss out on long term savings and comfort. Blower door testing and air sealing are under appreciated tools.Even if you have money to burn you should not waste it. Climate Change will impact everyone. Leave a better future for your children and grandchildren. Join in and speak up for the future of the planet.
Depends on the improvements.Some improvements take over 40 years for a ROI