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Can I Run a MrCool DIY Line Set Down an Interior Wall? - Ask the Expert Episode 233

Today's question comes from Timothy. "Hey Dan, I'm looking to install a MrCool DIY Multi Zone mini split in my house. One unit is going to be placed on the interior wall and I was going to have the MrCool DIY line set run down the interior wall and then under my crawl space to the condenser unit. My house was built around the 1930's, so it's a true 2x4 wall framing. How tight of a bend can the MrCool DIY line set be manipulated to make this work? Or will I have to find an alternative solution?" Can it be installed that way? Yes, it can be, but it's going to be a little more difficult that a normal DIY installation. If I'm understanding what you're saying, the line set is going to have to go straight down through the interior wall. So, that means you're going to have to bend that line set a full 90 degrees, which could cause problems. You are going to have to be really, really careful to make sure you don't have any kinks or creases in that line set. Ideally that should be done by somebody who has done it before. You may want to ask someone you know who has. If you do it wrong you could really mess up the MrCool DIY line set. Have any more questions? Just ask in the comments below.
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Ron Spinabella
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I regularly find something useful in your messages. This was actually no exemption. Maintain it up!
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Steve
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Can I run the lineset through the garage on it's way to the outdoor unit, to allow a better positioning for the indoor unit?
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garett brennan
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what is the width of the different lines and how many are there? I am trying to figure out how to run the lines through my internal walls and then my crawl space before reaching the outside unit....will need to run them separately as that 3.5" hole the installation videos suggest aren't an option.
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Chuck
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The unit comes with 25 feet of line can you get more line to lengthen so the inside unit can be placed more to center of the room
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Bob Jones
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If replacing an upstairs ducted unit with a DIY mini-split, is it possible to feed the lineset through the previous exterior access to the 1st floor attic?
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croooowe
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I have a DIY unit coming and have questions about the tubing. You seem to have repeatedly recommended not making 90 degree turns with the tubing, but how do you use it with any of the line cover kits? Such as bending it coming through the outside wall in the "90 degree end cap" and running it down the wall? Or when running it down the wall and then turning it at the bottom in a line cover 90 degree elbow? Are the tubes standard copper tubing? Can a tube bender be used on the lines for safer handling?
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Joseph Vespa
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OK, doesn't the line set cover come with a 90 degree bend; would bending the lineset for the elbow cause the same issue?
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Stephanie
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hello Dan! Our church in El Paso is about to install a 3-Zone DIY Mr Cool. The heads are going in 3 totally different places on the walls. Getting them to meet in 1 place to run to the exterior condenser is not an easy task because 2 of the walls on which we are mounting the heads are 2-ft thick solid cement. 1. Can the linesets be fed through the sides of the air-handler heads & run on the surface of the walls (the same surface that the bracket is mounted on ?) instead of going through the walls behind them. 2. Do you know if there is such a thing as a Lineset Extension Kit for the Mr Cool DIY Multi Zone and can it be joined on to the included lineset to make a 50' line ? Thanks in advance for your advice & help!
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Noah
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Are there knock out panels on both sides of the air handler, so the lineset can come out in either direction?
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For Cats
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I need to install indoor units on interior walls and have been fretting about drilling through the top plate and bending the lines to make that tight turn into the attic. Instead, I could run the lines through the wall into a closet directly behind the unit, then up into the attic through a hole in a closet ceiling. Is there any reason not to do it that way? Thank you
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Jason Gomez
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Hello I am installing a Mr cool Diy 3 zone on my mobile home I bought a wall bracket to reduce the amount of line set to buy because it's close to the 25 ft mark . I was wondering if the line set coming out of the house receiver can go horizontal on the wall directly to the outside fan with out a down pitch ? Thank you for helping everyone with their questions also, and your time.
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Henry Li
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Hi I am install a heat pump and I was wondering if the line set could be bent upwards 90 degrees from the indoor unit or does the line set have to follow gravity
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Terry Ulanch
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Can a 90 degree Elbow Connector be used in the line set (assuming correct size of course) ? example: Camco 57633 90° Elbow Connector for Olympian Wave Heaters https://www.amazon.com/Camco-57633-Connector-Olympian-Heaters/dp/B002UC13NY/
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For Birds
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We have a similar situation as "For Cats", but we're wondering if by chance you had any suggestions for filling the relatively massive hole in the ceiling so that maybe we can paint and thereby make it less noticeable. Thanks! ?
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Ronnie McCurry
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Instead of drilling a hole through the inside wall how about 4 in from the unit can you kind of serpentine it down the wall and run it out near the bottom to get the line set shorter. I don't want the line cut and flared I'm worried about a leak so I want to use all of the line set and I was thinking if I get it at a slope slight slope I can kind of curve it around the inside wall because it is in my garage and then go out to the unit.
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Carl stone
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Can I install the inside unit just 5feet off of the floor in an upstairs bonus room because of the tapered cieiling?
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jarhead
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Yes you can easily with DIY LINES but be sure to wrap the lines with the cloth tape which helps it slide easier. Just be careful, I used a rope to feed one end while the other person feeds other end
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Don Turrentine
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Can I run the line set down the interior wall and then out? Not hidden in the wall behind the sheetrock, but just on top of it.
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Brian
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I'm thinking of a 12K unit for my garage and externally routed lineset is a nonstarter for me. I can easily open up the wall to deal with all of my routing needs, so that part of internal routing is not a concern. I did have pause when reading a comment about a minimum 4" bend radius, so to ensure I'm able to maintain that coming off the air handler with the lineset, I think I'll build a 2x4 frame I'll mount to my interior wall that will then serve as the mount for the air handler- basically giving me another three and a half inches to work with to get into the wall cavity. Solid plan? I also would prefer to plumb a PVC drain line for longevity's sake. Would I be able to do this without issue?
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J. Berk
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This may be a shot in the dark, but I ordered my multi-zone mini split a few weeks ago and it should be arriving soon. It’s a four zone mini split. I am planning on installing one in the living room, but I have no direct access to the outside from the wall I am planning to install it on. In other words, I can’t drill a hole through any of the living room walls because they don’t face the outside. I was wondering if it would be okay to run the lineset up through the attic and then connect it to the condenser outside? And if so, does it have any effect on the condensate drain line?
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Jesse Bailey
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If running the lines through the wall cavity (either up to the attic or down to the crawl space), could you drill through the interior drywall at an angle and then use the width of the stud-bay (usually about 15 inches) to ease the curve as much as possible so as to reduce the chance of kinking the line? I'm hoping to be able to do just this in order to avoid having to run a plastic cover over the lines for essentially the entire length of my house if possible. Do you think this would be a feasible option for reducing the chance of kinking the line making this curve and still allow me to use the interior wall to route lines out of sight?
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Landon W.
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Are the condensate lines and refrigerant lines 'cabled'/paired together? In other words, is it possible to run refrigerant line up, down, left and right what have you, and then run a very short (or just a different route) amount of condensate line out a hole in wall to a separate location all together? If they are paired, can they safely and effectively be separated to do so?
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Dave Rettig
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Dan, I have read your answers that the line set can be run along a interior wall running through knock out on either side. I would like to exit, when looking at the unit, the right side which would require bending the line set 180 deg to exit, that should not be a problem? Any special care? Thanks
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Bernard Rottiers
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Hello, Ive planned to purchase/install a 12k 115 DIY in my bus. The plan has been, and prepped, to come out the right side of the air handler, bend 90° down an open channel then through the floor of the bus into a waiting rack. 1. Can I come straight out the side? 2. Smallest hole I would need through my floor? Thank you! Great videos!
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George Hubbard
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I have read many comments on minimum bend radius of the linesets, especially not to kink the copper tubing. However, I noticed that the linesets on the air handlers have a very short radius bend. It seems like only a 1" radius, and when I stripped the insulation away, the copper line is actually kinked at that short radius bend. So is this a problem since we are not supposed to have any kinks and I have one immediately at the air handler? I assume that when I straighten out the line as it goes through my wall, that kink will not relieve itself.
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RTGeek
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I have a HVAC friend who can help me customize the lines to make a sharper bend into a wall as many others here have asked about. This could include some soldering and evacuation prior to connection. Is there a way to buy the MrCool 3 zone system, DIY or possibly the Olympus system (to allow for a potential ceiling cassette choice), and not void any warranties? Are the flare fittings proprietary? I read somewhere that the MrCool flares are not standard angles. Thanks for your help!
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