What are the Line Set Length Limits for the 27K and 36K Multi-Zone DIY? - Ask the Expert Episode 237

Today's question comes from Charles Dart. "Hey Dan! What are the line set length limits on the MrCool 27K and 36K Multi-Zone DIY systems?"

On any mini split you have got refrigerant lines that connect to the inside air handler and they go outside to the outside condenser. So, there is a maximum length that line can be. A compressor can't push refrigerant like a mile. That would be impossible.

So, every condenser and air handler, whether it's multi-zone or single zone, is going to have a limit.

For the 27K, the total line set length can't be more than 197 feet, which is really far. So, you should be good. However, you can't have a single line set more than 75 feet between each air handler and the condenser. If you need more than that, you're going to have to do something else or move your condenser.

For the 36K, the total line set length can't be more than 262 and the single line set length between each air handler and the condenser can't be more than 75 feet again.

If you have any more questions, please, just ask in the comments below.

8 comments (view/add)
  • JOHN LEMCZAK
    JOHN LEMCZAK
    Posted on 11/25/2020

    What length of line are the units rated for? If I were to install a 12k unit myself can I use a 25' lineset using just the precharge? In other words, without adding refrigerant?

  • Dan Danowski
    Dan Danowski from Ingrams
    Posted on 11/25/2020

    Yes, you could use a 25' line with the DIY 12k. They lines themselves are precharged for the DIY units.

  • William B Bulliner
    William B Bulliner
    Posted on 11/22/2020

    Can more than one inside air unit be on the same line?

  • Dan Danowski
    Dan Danowski from Ingrams
    Posted on 11/23/2020

    No, each would need its own line.

  • Rick Snow
    Rick Snow
    Posted on 11/17/2020

    What's the minimum length you can have on the line set of a 12k Mr. Cool unit?

  • Dan Danowski
    Dan Danowski from Ingrams
    Posted on 11/17/2020

    If you're asking about a DIY system, the shortest line set available is 16'.

  • Charles Dart
    Charles Dart
    Posted on 11/4/2020

    One other note, Dan. I go by Chuck and I do play darts. For years we had a competitive team called......

    Chuck Dart and the Dart Chuckers

  • Charles Dart
    Charles Dart
    Posted on 11/4/2020

    Thank you, Dan!
    Chuck


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