Line covering is often referred to as “slim duct.” It is a plastic channel that is shaped similarly to a rain gutter downspout, and it is used to hide and protect the mechanical lines used to connect the indoor mini split unit to the outdoor unit. Each section has two parts: a front and back. The back piece is attached to your home, and then the refrigeration lines, drain lines and electrical wire are installed. Once the lines are installed we snap the front cover on.
We offer four choices of colors: white, tan, brown and paintable. Our system designers carry samples of all the colors. It’s best to hold them up to your siding to see which best matches your home’s exterior. We have found matching your window trim or gutters looks the best, or we can use the paintable line covering for a perfect match. The paintable line covering has a rough surface that accepts paint; this is the best way to get a perfect match that will hide the line covering. Before the installation date, we will deliver the line covering to your home so it can be painted on the ground. Once it is painted we will install it on your home. You can also paint it in place at a later date.
The most common mistakes we find when we are reinstalling systems installed by our competitors is not sealing the penetration where the lines come out of the house, and using vinyl drain line instead of rigid PVC pipe.
When the penetration is not sealed, the wall unit will pull dust from the wall cavity. A sign of this happening is dust around the bottom right corner of your wall unit. Water can also get into the wall cavity from the outside; this will cause water damage in the wall and mold growth. We use expanding foam in the wall cavity to make an airtight seal in the home’s envelope. Then we use silicone caulk on the outside of the hole to keep water out. These few simple steps can head off a major headache down the road.
When we started installing mini splits, we used vinyl tubing per the manufacture’s instructions. Then we started receiving calls of indoor wall units leaking water. What we found was the vinyl tubing was heating up in the sun and kinking shut, so from that point on we switched over to rigid PVC pipe for all of our ductless mini split installations.
For more information on line covering in the Twin Cities call us at (651) 776-7214 or Schedule an Appointment.