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Old 01-28-14, 06:03 PM   #1
pinballlooking
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Default Mitsubishi 30 SEER Mini Split sweet.

Check it out
100% rated heating capacity at 5 F outdoor ambient
Hyper-Heating performance down to -13 F outdoor ambient
http://news.mehvac.com/Bulletins/FH_Product_Guide.pdf


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Old 01-28-14, 07:49 PM   #2
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I just saw this when I was checking out the AHRIdirectory dor org site yesterday. Before this I was looking at the Panasonic XE12PKUA and before that the Fujitsu 12RLS. These units keep getting better. Now I need to decide if I'd rather have the Mitsubishi or the Panasonic. The Panasonic XE12PKUA has a 12,500 max output at 5 degrees and the same size Mitsu is 13,600. The Panasonic doesn't say if/what it can do below this temperature so with the -13 hyperheat and higher SEER and HSPF, I'm suddenly edging towards the Mitsubishi pretty hard now.

What happens at -20f though does it still produce a little bit of heat along with some supplemental resistance heat(space heater) or would I be shuting it off if it doesn't shut itself off? My area got down to -21 on January 6, -15 today and we've had a total of 6 days where we dropped below -13f. Our design temp is -11f here and we're definitely having a frigid winter but I'm trying to get the heat load of my house down under 10,000BTUhr at design temp through superinsulation and I'm okay with some periods where the heat demand isn't quite met but if this thing completely shuts down at -20f rather than having a 5k space heater taking over the slack, I might need to rethink things because -20f with a 5k only would put me in 22 degree interior territory but two(10k) and I've got myself covered to 64f but I'm not sure I want that much resistance.

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Old 01-28-14, 10:22 PM   #3
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Quote:
Originally Posted by pinballlooking View Post
Check it out
100% heating capacity at 5 F outdoor ambient
Yes, it does look like very good specs, but it ain't quite true that it has 100% capacity at 5 F outdoor ambient.

But then, you were joking, right?

-AC
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Old 01-28-14, 10:28 PM   #4
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Quote:
Originally Posted by AC_Hacker View Post
Yes, it does look like very good specs, but it ain't quite true that it has 100% capacity at 5 F outdoor ambient.

But then, you were joking, right?

-AC
I was just quoting the sales flyer. But it should say rated capacity @5deg
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Old 01-28-14, 11:36 PM   #5
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Quote:
Originally Posted by pinballlooking View Post
I was just quoting the sales flyer. But it should say rated capacity @5deg
Yes, that would be a better idea.

I'd like to see a table with max output at every 10 degree ambient point.

But all this aside, it looks like a really good unit.

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Old 01-28-14, 11:46 PM   #6
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The power being used @17 deg is very impressive also the power cooling is very good.
The just keep getting better.

My power company will give a couple hundred rebate for putting efficient HVAC but the will not do it for any Mini Split and you have to hire a HVAC tech to install that they approve. They need to get with the program and allow MS.
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Old 01-29-14, 12:13 AM   #7
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You can get a federal rebate on a mini-split install. It has to be energy star certified and professionally commissioned. If you look hard enough, you can find a licensed contractor that will do a once-over on your system that has been installed DIY. They will want to observe deep vacuum being held and open the outdoor unit valves at the very least.

Go turbo-hyper-heat! If I could afford one, I'd buy one just to sleep next to it.

If you look hard enough, you can find performance charts on the major brand units.

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Old 01-29-14, 05:36 AM   #8
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So, what drove you away from the Fuji? Not that I have any financial interest in the company, haha
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Old 01-29-14, 07:06 AM   #9
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100% capacity at 5 degrees is 10600 with a rated capacity of the same at 47 degrees but it still produces more heat at 17 degrees 12,200 or 18,000 at 47 degrees but the power rating at 47 is based on the 10600 which is the max it produces as 5 degrees. It appears that it is basically a way to get better HSPF numbers by having it not heat at its true max compressor speed for the ratings. The Panasonic's documentation says the max consumption rate right below its max capacity so you can get the idea of how much efficiency it has at that point. I found a link that says that the 9k unit produces 62% capacity at -13f, so 10900*.62=6758 at -13 and 10900*.82=8938. The question is if it is producing that much between defrost cycles and losing some when it defrosts, what are you really left with?

For the 9k:
"Highly energy-efficient system that features 100% heating capacity at 5 degrees fahrenheit, 82% at -4 degrees fahrenheit, and 62% at -13 degrees fahrenheit Base heater is available as an option"

For the 12k:
"75% at -4F, and 58% at -13F"
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Old 02-01-14, 06:40 PM   #10
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9,000BTU / 560W = 16 EER. Pretty impressive. 12EER on the 15k model, nothing special there..


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