Consider your equipment type and supporting systems.
Attic furnace duct design.
One on a concrete slab.
The purpose of residential ductwork design is to properly distribute the airflow produced by your heating cooling system to your house.
Designing a duct system is important but there are a few critical steps that come first.
Adapt the design to the type of unit.
The layout and installation of the duct system will incorporate these basic principles of good ductwork design.
Make sure your hvac contractor follows these duct design best practices and principles using manual d.
Number one is the heating and cooling load calculation using a protocol like acca s manual j or the ashrae handbook of fundamentals.
A furnace can suffer from a drop in energy efficiency if it s in an unconditioned space such as an attic.
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.
A furnace in the attic is a design that works for all homes.
Make the layout as symmetrical as possible with branch ducts spaced evenly along the trunk duct and each branch of similar length.
Well mainly it s a way to save space.
You might not receive the same air movement benefits if the unit is in a garage either.
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.
You ve got to know how much heating and cooling you need for each room in btu hr.
This involves return air unconditioned coming into the heating cooling system.
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.
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Hvac how to size and design ducts.
Attic hvac systems save space.
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.
Certain types of air conditioning systems like heat pumps require larger ducts.
So why put an hvac system up in the attic at all.
Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space.
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.