Blake shurtzmuch like the recommendation to install dampers i almost always emphasize adding a second return when replacing ductwork.
Adding a second zone of heat in attic.
We went with.
The thermostat will usually start at 95 degrees fahrenheit which is the temperature that the attic fan usually starts at.
This solution doesn t address the ductwork so it is an inferior solution compared to creating an unvented conditioned attic.
That was for a 1 5 ton system and the static was 0 33 inches of water column iwc.
Attic hvac systems save space.
Well mainly it s a way to save space.
You should only add zones if you re still not comfortable after optimizing the building envelope.
You can build an insulated mechanical room in your attic if you want.
If the temperature is too cold or too hot for your liking the thermostat.
So why put an hvac system up in the attic at all.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.
But by adding powered attic fans you will draw more air into the attic.
It will help to keep the attic much cooler in the summertime.
2 improving ventilation in the attic and or insulating the attic floor to minimize the effect of attic heat and cold in the two season on the upper floor.
The cost of a dual zone system depends on your hvac contractor but a ballpark figure would be around 2 500 3 500 if it is done during an installation depending on the size of your house and your area.
How much does a dual zone air conditioning system cost.
And the extra heat is not just a summer concern come winter hot attic air can melt snow on the roof during the day only to refreeze when temperatures drop overnight creating ice dams that lead.
In other words seal air leaks and increase insulation first.
During a major energy upgrade that we recently completed we had two return ducts a 14 in the main house and a 12 return duct in the master bedroom.
Most homeowners who build an insulated mechanical room in their attic make the room too small.
Using insulation only keeps the attic s heat from traveling through your home.
It is mounted by your equipment and is the brains of the entire zoning application.
Several issues to consider.
Thermostats read the air temperature in each room or zone of your house.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.