Can I run my lineset inside an existing wall?

April 24, 2010 by Shawn Mack  
Filed under Ask Thomas

First Name:  Gene

Problem: With the sheet rock removed can the line sets be installed in the 2×4 walls near floor level and travel up to the attic to the wall units?  The line set would then drop out of the attic to the upper wall and not go outside. Is that doable or a bad idea? Thanks GT

Solution:  There shouldn’t be a problem with running the line set within a wall.  Make sure that the line set is insulated properly because they will sweat from the internal refrigerant gases.  Use 3/8″ or 1/2″ foam liner around the copper lines.  Make sure you install the condensation line properly at the top as well.  The condensation line uses gravity to expel water.  If you cannot expel the water downward, purchase a condensation pump to move the water to an appropriate outside area.

Random Posts

6 Responses to “Can I run my lineset inside an existing wall?”
  1. milfberry Says:

    This is a great blog you have here Sharon. I guess this is my first visit here and I always love it. I am going to be a frequent visitor here. Love your writing style. Thanks for this wonderful tips. Even though I am not very good with writing I can see where you are going with the suggestions.

  2. KIM Says:

    I don’t have room above windows to put minisplit and have radiators and do not want another piece on the floor. The only place to put it is above big picture window right at front of my house or on inside wall and run it down interior plaster wall. But then how can I hide this inside the house. I have a lovely decorated home and this is like the white elephant in the room.

  3. L,C,Parker Says:

    We have a 1980 MCi 32 passenger bus with windowss,40 ft longx 7ft wide with 7ft ceilingtraveling mostly in Central tesas- Dallas area. What is the proper btu unit for us? How large a power inverter on a 24volt system would we need?

  4. klamry do zasłon Says:

    Thanks for some other informative website. The place else may I get that type of info written in such an ideal means?
    I have a mission that I’m just now running on, and I’ve
    been on the look out for such information.

  5. Ramon A Mercado Says:

    Can i use a regular a/c thermostat on split unit

  6. Peter Halick Says:

    I did an inside the wall installation about a year ago. the crucial issue is condensation. If the insulation on the line set gets damaged there is a high potential of accumulating water inside the wall. Same for the drip line. The other concern is just being able to route the line. Line sets aren’t made to take tight bends. Making a right angle bend in a wall can be difficult and one stray nail or protruding screw can damage the line.


Tell us what you're thinking... write a comment response below.