Attic Furnace Duct Design

Situate the air handler close to the center of the layout to minimize the length of ductwork spans.

Attic furnace duct design.

Adapt the design to the type of unit. So why put an hvac system up in the attic at all. The layout and installation of the duct system will incorporate these basic principles of good ductwork design. Certain types of air conditioning systems like heat pumps require larger ducts.

This involves return air unconditioned coming into the heating cooling system. Then by heating cooling that air delivering the newly conditioned air to your home. A furnace can suffer from a drop in energy efficiency if it s in an unconditioned space such as an attic. Attic hvac systems save space.

Continuing education and development inc. If your system includes air purifiers with activated charcoal filters these also affect air flow and may require larger ducts and or additional air returns. To promote balanced air circulation through the supply ducts home and return ducts the ductwork should be simple in layout accurately sized sealed insulated in unconditioned spaces and installed in the right places. You ve got to know how much heating and cooling you need for each room in btu hr.

If you don t have a crawl space or a basement then it can be a challenge to place a furnace on the ground floor of the structure. A furnace in the attic is a design that works for all homes. Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts. Hvac how to size and design ducts.

Number one is the heating and cooling load calculation using a protocol like acca s manual j or the ashrae handbook of fundamentals. Sketch a rough design using a central supply duct from the unit to the opposite end of the house with branches forking to each outlet. An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan. Well mainly it s a way to save space.

High efficiency furnaces aren t usually recommended for an attic. Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space. Consider your equipment type and supporting systems. 9 greyridge farm court stony point ny 10980.

Make the layout as symmetrical as possible with branch ducts spaced evenly along the trunk duct and each branch of similar length. Make sure your hvac contractor follows these duct design best practices and principles using manual d. Designing a duct system is important but there are a few critical steps that come first.