Best Location for HVAC Supply and Returns
Zone 3A W/H – I have an existing oversized HVAC system that is due for replacement and have been looking to possibly convert the house to a rightsized 3 zone Mitsubishi ducted mini-split system, it’s a ranch-style house so it would be pretty easy to divide into thirds.
I’ve had a Manual J & S done, but I am concerned that the existing supply (shown in red) & returns (shown in blue) weren’t well thought out… master bedroom supply blows directly on the bed instead of towards windows or they blow directly on the ceiling fan, all the bedrooms (but bedroom 4) & office rely on door undercuts for their returns.
My main question though is how do you intelligently determine the optimal placement of supply and returns? It seems very subjective and from what I can tell there isn’t any software that handles it in the residential space.
I have had a clean sheet Manual D done on the house in Wrightsoft just to see what it potentially “should” have been, but I don’t really have any way to quantify the impact of leaving the house with the existing vent placement vs optimizing it.
Looks like Autodesk is kind of starting to move the direction of that functionality, but not sure it’s user friendly enough yet.
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