Is your mini-split indoor unit mounted low?

[WVBrady]

I just ran across this and noted that, for mainly heating useage, he puts his inside unit at about 18 inches off the floor. This is the first I had heard of this, but it makes sense to me.

https://www.buildinggreen.com/blog/7-tips-get-more-mini-split-heat-pumps-colder-climates

 

[Volcrew]

I would never mount one like that for my climate. The heat feature of my Mitsubishi heat pump is rarely used, but, when it is, it positions the discharge vanes straight down. There is no corresponding vane setting that would work in cooling mode. Also, at 6 inches below the ceiling, it is not in my way.

 

[dsimatt]

You just handicapped the system for AC use, they have the lower mount style heads but I can't see any sense mounting a normal one that low.

 

[PoorOwner]

They do make a floor standing style indoor unit and the geometry of the fan will be much better, for example in cooling mode it should be throwing air upwards.

 

[yeldogt]

That was originally posted in 2013 -- so low temp and high efficiency are both possible today. As to the height -- For years the vast majority were AC only and 7' is ideal for AC.

For a house where most need will be heat I can see why lower would be more comfortable. With high ceilings, ideally you don't want it up at the ceiling height.

Remember, most homes with ducted systems use floor based registers -- window units are not very high on the wall.

.........this was a "think out of the box" type of article

 

[jjrbus]

I am all for thinking outside the box, innovation, creativity, that is why I have mini splits! I see no place in my house where this would work.

In snow areas mounting the outside unit up high is almost a no brainer.

 

[yeldogt]

I am all for thinking outside the box, innovation, creativity, that is why I have mini splits! I see no place in my house where this would work.

In snow areas mounting the outside unit up high is almost a no brainer.

There are many add on rooms -- open on three sides with windows where there is little room up high for the unit.

 

[jacks2000]

Mini-splits don't have very good filtration. Mounting them close to the floor just means the dust bunnies don't have to jump very high to clog up your unit.

 

[justinjoyal]

I would never do that and it goes againsts manufacturers’ guidelines.

 

[PoorOwner]

I would never do that and it goes againsts manufacturers’ guidelines.

But the puppy gets nice heat..


Those "green" building people don't seem to care about cooling, only heating.

 

[HotrodHR]

That's about the most rediculous thing I've heard lately...

 

[dsimatt]

There are many add on rooms -- open on three sides with windows where there is little room up high for the unit.

Why not use a model designed for that versus using the high mount style.

 

[Jackfre]

The louvers in cooling will set to blow the air across the ceiling. When in heat mode the air flow is directed down at approx 30-45* off the wall. With the modulating blower I find that the heat distributes across the floor quite well, BUT you have to position the evaporator properly for best results. If you want a floor mount then get the floor mount evap. They are a dual fan unit that will blow the cool air up and the heat across the floor. I would say that while the OP's unit will work it is really mis-application for that style evap.

 

[q2quest]

Mine is 10 feet off the ground with a 12 foot ceiling with the vanes pointed at about a 30 degree angle. It seems to work fine that way.

 

[jjrbus]

Curious I had to go look. Mistsubishi has a floor mount mini heat pump.

https://www.acwholesalers.com/Mitsubishi-MUFZ-KJ18NAHZ-U1-MFZ-KJ18NA-U1-/p76686.html

 

[Jackfre]

Mine is 10 feet off the ground with a 12 foot ceiling with the vanes pointed at about a 30 degree angle. It seems to work fine that way.

Manufacturers generally want the high wall units to be in the 7-8' height range. Reason being that the actual controlling stat sensor is mounted on the evaporator coil.Being to high will not allow the unit to properly sense the appropriate room temperature due to stratification.