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Duct vs Ductless Air Conditioners

Hi this is my first post,

I have 1250 sq. ft cabin that I keep at 72 degrees. To do this I have a 12000 BTU and a 6000 BTU and another 6000 BTU. I’m tempted to reinvest in a new system but I was wondering if it makes more sense to switch from a ductless system to a duct system.

Here are my options:

1) Replace my 3 units with 3 more units with the same BTU’s

2) Replace my 3 units with 1 big unit (24000 BTU’s say,)

3) Replace my ductless system with a duct system.

No matter the system I reinvest in, it’ll probably cost me a lot which is fine, I`m not here to compare prices. The question I have for you pros is which is the most sustainable future equipment investment strategy? Basically which option will give me the most bang for my buckÉ

Note: The matter is a bit more complex because some mini-split air conditioners qualify for a federal tax credit due to The American Tax Payer Relief Act of 2012.

Sources: or here


  • JackJack Posts: 797Member ✭✭✭
    Keep in mind

    that your current ductless system is "net to the space" and there are no duct losses. Given the increase in efficiency of the mini-splits and the heating performance increases at low temps, I'd upgrade the mini-splits and give up on the thought of ductwork. What I did is pull my ducted system and install mini-splits. I put a single 25 Seer unit in the primary living area and a dual unit in the upstairs bedrooms. Adding an addition this spring for new kitchen and new bathrooms I will put another super efficiency unit in the common area of the kitchen and be done with it. Personally, I will never put ductwork into my house again.
  • IronmanIronman Posts: 2,355Member ✭✭✭✭

    I can't imagine any benefit, only liabilities, by swapping ductless for ducted.
    Bob Boan

    You can choose to do what you want, but you cannot choose the consequences.
  • TonySTonyS Posts: 840Member ✭✭
    Same as Jack

    Pulled my ducted system and installed 3 ductless. Far better control over humidity. Ductless units are to AC as modulating boilers are to heating...the unit is the right size every day. 
This discussion has been closed.


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