Duct Work For Attic Furnaces

Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water.

Duct work for attic furnaces. I called out the original hvac company and they took a look and said they saw no water. An attic furnace is closer to the upper stories of a multi level home. Attic furnaces take advantage of the closer proximity to use shorter lengths of air duct. Most older homes have anywhere from 10 leakage clear on up to 35 40 leakage through ductwork.

Air ducts lose a fair amount of heat through leakage so shorter lengths are more efficient. The attic ductwork is flex duct work. Insulated flexible duct r6 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications. In last week s blog i discussed the practice of burying attic ducts in deep insulation since burying ducts is simply one of several ways to address the energy waste associated with the decision to locate ducts in a vented unconditioned attic it s worth taking a fresh look at all of the possible solutions to the attic duct problem.

It will not require long lengths of pipe to deliver heat to the rooms as a basement furnace does. Duct boosters efficiently improve air movement throughout your house which means your system can more quickly cool down or heat your home. It was new when the ac was put in 7 years ago. Different types of furnaces are manufactured to burn a variety of fuels including natural gas propane oil and firewood.

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. Flexible duct can be installed in place of galvanized pipe in many applications if allowed by your local hvac codes. Throw duct leakage into the mix and the problems are even worse. The master flow 4 in.

In addition its flexibility allows for easier installation in hard to reach areas. If you have leaky ductwork in your home or office then you are losing heat or cooling from your furnace or fan coil through the sides of it. Booster fans and accessories and whole house humidifiers can help make your existing ductwork system more economical. This additional insulation provides greater thermal efficiency to save energy.

Use metal flex or fiber board ducts that are insulated to code. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. The duct has r6 insulation which contains 33 more insulation than the standard r4 2 product. The most common furnace fuel in the u s.

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.