Attic Furnace Duct Design

Adapt the design to the type of unit.

Attic furnace duct design.

Designing a duct system is important but there are a few critical steps that come first. Certain types of air conditioning systems like heat pumps require larger ducts. The layout and installation of the duct system will incorporate these basic principles of good ductwork design. Number one is the heating and cooling load calculation using a protocol like acca s manual j or the ashrae handbook of fundamentals.

You might not receive the same air movement benefits if the unit is in a garage either. Make sure your hvac contractor follows these duct design best practices and principles using manual d. 9 greyridge farm court stony point ny 10980. 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. One on a concrete slab. 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. Consider your equipment type and supporting systems.

High efficiency furnaces aren t usually recommended for an attic. Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts. Then by heating cooling that air delivering the newly conditioned air to your home. Situate the air handler close to the center of the layout to minimize the length of ductwork spans.

Continuing education and development inc. Attic hvac systems save space. A furnace can suffer from a drop in energy efficiency if it s in an unconditioned space such as an attic. The purpose of residential ductwork design is to properly distribute the airflow produced by your heating cooling system to your house.

This involves return air unconditioned coming into the heating cooling system. Make the layout as symmetrical as possible with branch ducts spaced evenly along the trunk duct and each branch of similar length. 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. Hvac how to size and design ducts.

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. 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. Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space.