So why put an hvac system up in the attic at all.
Forced air system in attic.
It s easy to see your point about eliminating ductwork from the attic.
This drain removes the excess water that a heating system will generate.
Typically this indoor unit gets placed in a cabinet or closet somewhere inside.
A basement is below and an attic is above the main part of the house.
It also hard to predict where exactly the new air which is replacing the air forced out by the ventilator will come from.
The 20 to 30 foot long pipes that carry the refrigerant are disguised to look like a downspout.
Well mainly it s a way to save space.
It s expected that the air will come through the soffit vents into the attic space but that s not always the case.
Forced air systems are usually the cheapest ones to install in homes today and a furnace qualifies as this type of system.
Heat pumps and ducts are part of it too.
The trick to the installation of a gas furnace in an attic space is routing the condensate drain from the attic down through the core of the house to the basement.
If you don t have forced air the fan and coil system is typically placed in the attic where it will deliver cool air through ducts.
There are rarely instances when we will advise against an attic installation.
Since most homes have their hvac system serve multiple functions at once it can be cheaper to install the unit in the attic because the roof access can make inspections maintenance and repairs at lot easier.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.
Because the units forcefully pull air from the attic they can create depressurization in your home.