Improperly insulated ductwork and excessive moisture in the air.
Central air ducts in attic.
Here s a typical scenario for a 2 000 2 500 square foot two story.
If ducts are located in a crawlspace underneath your house cover the soil to reduce moisture.
For a 1 600 2 000 sq ft.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.
Final thoughts on condensation on ductwork.
Well mainly it s a way to save space.
Installing ducts in a multistory home goes more slowly since wall stacks are included.
If they are located in your attic be sure the area is properly insulated and any cracks or holes are sealed.
Furnace ducts that deliver hot air in cold months can be used for air conditioning.
Connecting an attic air handler to ceiling ducts in a single story home is a quick project.
Installing ductwork is a 1 4 day job because of the wide range of scenarios.
You should have your ducts inspected.
If you have ducts.
In addition to comparing ducts in the attic to ducts inside the building envelope roberts and winkler also looked at electricity savings of other measures such as adding insulation installing better windows and using higher efficiency air conditioners.
Acute temperatures in these areas contribute to thermal loss in metal ductwork.
At the end of the day there are really only two causes for condensation on ductwork.
Keep ducts spaced apart so air can flow between them.
Attic hvac systems save space.
Many times modifications are required to accommodate the greater volume of air produced by air conditioning.
Fibers may also work their way into closed system air handlers or ducts landing along duct work or circulating into the air in the rest of the house.
Both of these are easily treatable.
House a 2 5 ton central ac system costs 3 900 5 000.
If there is ductwork already in place your total installation price for a whole house central air will be very reasonable.
Central air ducts are often routed through unconditioned zones in the home such as the attic or crawl space.
Most homes that have a forced air heating system have ducts that can be used for ac as well.
Ironically older duct systems which tend to be larger work best when retrofitting central.
So why put an hvac system up in the attic at all.