Contractors can make the mistake of failing to consider the type of air conditioning system you have load requirements of different rooms where ducts and equipment are located and the materials used.
Ac ductwork in attic.
Ductwork located in an attic must be hung properly so that the insulation can do its job.
Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.
The next step is to ensure that you add a vapor barrier to your ductwork.
These ducts are more cost effective good for tricky installations in tight places where rigid ducts.
With hundreds of square feet of ductwork surface area in the attic and a δt of 75 f the air coming out of the vents in your home will be significantly higher than 55 f.
One reason that ac units go up in attics is because they re cheaper and easier to install.
Reduce the humidity level around your air ducts.
In more cases than not a 3 ton ac with the ducts in the attic has a ton or so of load that s just from the location of the ducts in the attic and the associated duct gains leakage etc.
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.
Ductwork design mistake 1.
Choosing the right ductwork for installing in your attic hard ductwork.
Here are some of the common ductwork design mistakes that impede the function of your air conditioning.
So if you see unusual water staining on any of the ceilings in your home and the roofer has eliminated roof leaks it is likely coming from some fault with the duct system in your home.
It s a lot simpler for your installer to leave ductwork loose rather than having to cover it and wind it through floors and walls.
Most modern ductwork comes standard with insulation and a vapor barrier so my recommendation would be to just replace your ductwork.
Throw duct leakage into the mix and the problems are even worse.
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 you don t see them unless you have cause to replace them.
That saves time and whenever your contractor doesn t take as long to finish a project you save in labor too.
Otherwise moisture will build up and you can face possible mold problems in your attic.
The remaining 2 tons of capacity is at least 1 5x oversized for the actual 1 load.
Keep ducts spaced apart so air can flow between them.