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.