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Forum topic by Burb posted 09-18-2015 04:55 PM 676 views 0 times favorited 5 replies Add to Favorites Watch
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Burb

109 posts in 1837 days


09-18-2015 04:55 PM

I have decided to put a mini split (AC & heat pump) in my shop, but I’m not sure which unit yet. For those of you that have installed mini split systems in your shops, please answer a few questions for me:

1. What size shop is it heating/cooling?

2. What Manufacturer & Model # is it? (Compressor & Head if you know them both)

3. What size/tonnage is it?

4. How long have you been using it in your shop?

5. Have you had any issues with it? (I’ve been told wood dust can mess up the electronics in these.)

6. Are you glad you got “this one”, or do you wish you would have gone another route?

With this being a major expense, I really want to ensure I’m make the right choice.

Thanks in advance for your time.

Mark

-- I aspire to be a novice woodworker...


5 replies so far

View David Taylor's profile

David Taylor

326 posts in 554 days


#1 posted 09-18-2015 11:52 PM

I got quoted over $5000 for a system for my new 20×20 shop, which didn’t cost me that much to build, so I am going a different route. I am interested to hear what responses you get, though.

-- Learn Relentlessly

View CL810's profile

CL810

3458 posts in 2455 days


#2 posted 09-19-2015 02:22 AM

One month ago I put in a Mitsubishi 21seer heat pump split unit: o/s MSZ-GE15 & i/s MSZ-GE18. 3 car garage with 11’ ceiling.

So I’ve had no heating experience with it but have tested hot, high humidity weather. The big realization for me was discomfort in the shop had more to do with humidity and lack of air movement then it did temp. Now it can be 80 degrees in the shop but the humidity is 45% in my shop and I’m fine. So I don’t cool the shop down to 72 because I don’t have to.

The louvers can be adjusted with the remote control and set to oscillate. The air movement it creates is a welcome relief.

The service manager was familiar with these units in wood shops and warned me to clean them regularly.

So I don’t have a track record with it but I did research it thoroughly and found the Mitsubishi to be highly rated in performance and reliability. I got a price from my Htg/AC company and it was high and not Mitsubishi. I contacted the authorized Mitsubishi dealer and got a much better price. Our utility company has a rebate program for installing high efficiency equipment so you might to research that with yours.

Good luck!

-- "The only limits to our realization of tomorrow will be our doubts of today." - FDR

View SignWave's profile

SignWave

324 posts in 2502 days


#3 posted 09-19-2015 02:00 PM

The level (or lack of) insulation can make a huge difference for sizing a unit. Insulating the ceiling will have a big effect, as will a garage door if it’s not already insulated. Windows, whether or not you have shade, the amount and type of attic ventilation, etc. all add up.

But CL810 is correct. Lowering humidity and getting the air moving will make a big difference in the summer months.

I know this isn’t answering your specific question about brands, but evaluating what unit will work in your space is about a lot more than just looking at square feet.

-- Barry, http://BarrysWorkshop.com/

View Burb's profile

Burb

109 posts in 1837 days


#4 posted 09-19-2015 02:46 PM

CL810 – You mention you clean your unit regularly. CIs that monthly, weekly, etc.? Just curious. I do have a Jet AFS-1000B air filter hanging from my ceiling that I run whenever I’m working with my garage door shut. Its hooked to my light switch, o I may need to change that so I can leave it on using its timer mode for after I’m done working.

I agree that the humidity is a big issue & concern. This is one thing I am hoping to help eliminate as well.

As for research, its seems to be standard opinion that Mitsubishi is the best out there. I will be calling that rep on Monday. I’ve also found the GREE seems to make about 1/3 of the units being sold today. They make them for many other brands.

My shop is insulated pretty well, but I do have a few spots around a walkthrough & garage door that I need to reseal.

-- I aspire to be a novice woodworker...

View CL810's profile

CL810

3458 posts in 2455 days


#5 posted 09-19-2015 05:54 PM

I’ve only had the unit a month. I’ve not had any projects that have been big dust producers. The rep said I would have to clean regularly but so far it hasn’t needed it.

My unit is installed near the ceiling so maybe less dust gets up there, i don’t know. I also have an air filter that I run when necessary.

-- "The only limits to our realization of tomorrow will be our doubts of today." - FDR

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