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we would like to know how 2 air conditioning systems interact in a single space; specifically, if you have a central air conditioning system in your home, can you use a window air conditioner to supplement the cooling in a room which was added on and has no duct from the central system? There is a set of double doors entering the room which we would like to leave open to provide free air flow between that room and the rest of the house. we’re thinking of using both the central air system together with the wall unit in the add-on room with no central duct. is there any problem with this approach?
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we would like to know how 2 air conditioning systems interact in a single space; specifically, if you have a central air conditioning system in your home, can you use a window air conditioner to supplement the cooling in a room which was added on and has no duct from the central system? There is a set of double doors entering the room which we would like to leave open to provide free air flow between that room and the rest of the house. we're thinking of using both the central air system together with the wall unit in the add-on room with no central duct. is there any problem with this approach?
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As long as you keep the addition at a constant temp. with the rest of the house, you should have no problem. If the addition is to warm, yoou may overwork your central system making the balance of your house to cool. If it's cooler in the addition and depending on where your return ducts and thermostat are, the room unit may work overtime. Consult a qualified HVAC tech. to confirm your cooling plans.
Be sure the room AC is sized properly also. I don't know what your situation is, but it may be possible to get a supply from the central system to cool the room. All these things depend on where you are geographically and financially, size of the units, etc.