Don t use standard cloth duct tape on hvac ductwork since the adhesive won t hold up to extreme temperatures.
Attic hvac ducts.
If you have central heating and or air conditioning in your home the warm or cool air is delivered to each room through a system of connected ducts and vents.
Use metal flex or fiber board ducts that are insulated to.
With newer foundation systems involving embedded rebar or tension cables making in slab hvac ductwork nearly impossible there s little other option but to move it to the attic.
All ducts are at risk for this type of leakage.
The really bad news is that with old metal duct systems the only option is replacement of the ducts to stop the rain in the attic.
The air ducts for a central hvac systems are typically located above a home in the attic or upper crawl space or underneath a home in the space between the foundation and the floor so.
Here s why that is a good thing.
For an added layer of protection you can apply duct mastic to the tape and duct.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.
Why is this a problem.
So water is condensing on your ac ducts.
The 1 800 square foot brick ranch in climate zone 4 dates from the 1960s but the previous owner installed both a furnace and ductwork in the attic just four years ago.
So why put an hvac system up in the attic at all.
Attic hvac systems save space.
Attic hvac systems also require shorter ducts.
Well mainly it s a way to save space.
In the 70 s and 80 s in slab hvac ductwork was commonplace and took advantage of the relatively stable temperature of the slab at or near the ground.
When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.
The unconditioned space also houses his hvac system.
Here are the itemized costs for the most common types of ductwork and supplies needed to complete installation.
Flex ducts themselves do not sweat however if the.
Duct leakage causes a lot of problems including less.
Why is condensation on ductwork a problem.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.
1 10 5 25 per foot insulated flexible duct 4 to 16 diameters used as branches or in radial duct attic systems 2 30 13 00 per foot round and oval sheet metal duct 3 to 8 diameters typically used for trunks in small homes and.
There will be less duct leakage.
First water dripping off of your ducts and onto your insulation can cause the insulation to compress which decreases it s r value or ability to insulate.
Flexible duct is a plastic tube that is reinforced with wire and then insulated on the outside.
When water condenses and drips into your attic or home it can cause a some serious secondary problems.
When hvac ducts are installed in a vented attic in a dry climate bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space.
Ted has more than a few cobwebs in his attic.
Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.
The next most typical type of duct systems is made of flexible duct.
