Mini Split recomendation

[99Mike]

Currently building a 24X28X10 stick built detached garage in Fayetteville, NC. Temps reach the mid 90s in the summer and mid 40s in the winter although it occasionally goes above 100 and below 32F. It will have a attic which will be used for storage and will not be heated/cooled at this time. The walls will be insulated with R15 and the ceiling with at least R30. The 16X8 door will be insulated as well. It will have one entry door and 2 windows. What size and make Mini Split would you recommend?

Thanks,
Mike

 

[pcmeiners]

Mike, minisplit sizing has been discussed numerous times before, please read through these links, then ask questions.....

Daikin MiniSplit question. Confused on specs.

I'm at the pont now where I want to be comfortable working in the garage. We are having our entire house ACs/Furnaces replaced and I thought I'd have the same folks install a mini split in the garage. However, that's not happening after getting a quote back for $8k. I will install it. I'm...

www.garagejournal.com

Hyperheat vs standard minisplit?

I have tried various searches to discover the physical difference between Hyperheat and non-Hyperheat minisplits. Mitsubishi, Mr Cool use this term, Senvile and others use other terms. I know Hyperheats heat to lower outside ambient, because I have three of them. I am just wondering if the...

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Question about mini split sizing

May I ask a question about a room in a house, and not my garage? If so, I'm deciding between a 24000 BTU or 18000 BTU mini split for a large open livingroom/diningroom/den. The total area is about 700 sq ft. The windows are single pane, the house is old and poorly insulated. One contractor...

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What size Mr. cool for a 2 car, 12' ceiling garage?

After getting quotes from HVAC companies of $6k and $7k to mini split my garage, I want to just do a Mr. Cool unit DIY. I already have the 220v breaker that I added when I put in the Tesla charger and generator transfer switch. Garage is 20' wide, about 25' deep, has 12 foot ceilings. It's...

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18k or 24k mini split

I know this has been discussed to death. I currently have a 18k BTU mini split in my 24x30x10 garage. The 18btu cools it in the summer (90 degrees) and does make heat down to 15 degrees. Here in Manitoba in the winters it gets to -30F from time to time. I'm looking at Napoleon NH25 series...

www.garagejournal.com

 

[Phuckin' Jim]

A Senville or Pioneer 12k should do it.

 

[PCMusicGuy]

Brand is a very hard thing to recommend. All of them are made in either Japan, Korea, or China at various different price points and warranties. If you are doing it all yourself, spend some time doing some searching what might be best for you. In what I've seen over the years, a lot of people will use Mr. Cool or Pioneer. If you are going to get someone to do it, just find someone you can trust and use whatever they recommend. Almost all of the them are difficult to get parts for. The large wheel that moves the air is probably the biggest part that will need maintenance (i.e. cleaning) so it may be worth finding one where that is easily removable.

I would go with at least an 18k unit for your size. You'll get the benefit of a stronger system, but generally, the higher BTU output you get, you can also find a higher SEER number which means it is more efficient. Also, I'd recommend keeping your line set on the shorter side as that also helps with efficiency.

 

[99Mike]

Thanks for the replies.

 

[thammel]

A 15-18K BTU unit would be plenty. Best is probably Mitsubishi Mr Slim units. Not cheap.

 

[pcmeiners]

First for a well insulated garage 12k is ample especially in NC. Reads the threads I linked

" but generally, the higher BTU output you get, you can also find a higher SEER number which means it is more efficient.

Wrong, just the opposite, the lower the Btu capacity minisplit units the higher the SEER and HSPF efficiencies can be.

example.....

https://www.goodlifehvac.ca/images/Fujitsu_LZ_Series.pdf

 

[99Mike]

Thanks

 

[daveindenver]

Currently building a 24X28X10 stick built detached garage in Fayetteville, NC. Temps reach the mid 90s in the summer and mid 40s in the winter although it occasionally goes above 100 and below 32F. It will have a attic which will be used for storage and will not be heated/cooled at this time. The walls will be insulated with R15 and the ceiling with at least R30. The 16X8 door will be insulated as well. It will have one entry door and 2 windows. What size and make Mini Split would you recommend?

Thanks,
Mike

Indirectly related, I am curious how you are spanning the 24' width to support the ceiling and insulation, especially since not using trusses? You mentioned R15 walls - are you doing 10' walls with 2x4? Have you already started the build?

 

[99Mike]

Indirectly related, I am curious how you are spanning the 24' width to support the ceiling and insulation, especially since not using trusses? You mentioned R15 walls - are you doing 10' walls with 2x4? Have you already started the build?

The footers are poured and the bricklayer is doing the foundation as we speak. The walls are going to be 10 foot or so. The foundation will be 2 foot with 93 inch 2x4s for the additional 8 feet to match the house. I am doing attic trusses to span the 24 feet. This will give me an additional room over the garage.

 

[daveindenver]

The footers are poured and the bricklayer is doing the foundation as we speak. The walls are going to be 10 foot or so. The foundation will be 2 foot with 93 inch 2x4s for the additional 8 feet to match the house. I am doing attic trusses to span the 24 feet. This will give me an additional room over the garage.

Nice, sounds good. When you said stick-built, I thought you meant without trusses.