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Fourgonbound 119K Views
Jul 12, 2021 11:00 PM

Costco Members: MRCOOL DIY 18K BTU Mini-Split Air Conditioner & Heat Pump

$1,300

$1,300

+ Free Shippingat Costco Wholesale
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Deal Details
Costco Wholesale has for their Members: MRCOOL DIY 18K BTU Mini-Split Air Conditioner and Heat Pump with Wi-Fi Smart Controller (DIY-18-HP-230AE) on sale for $1299.99. Shipping is free.

Thanks community member Fourgonbound for sharing this deal

Note, you must be a Costco Member and signed into your account to view sale pricing and purchase at sale price. Refer to the forum thread for additional deal ideas and discussion.

Key Features:
  • The MRCOOL DIY series comes with pre-charged line sets alleviating one major obstacle to amateur installation in a single stroke.
  • Functionality for Apple and Android smart devices; works with Amazon Alexa; works with Google Assistant.
  • Refrigerant leakage detection ensures your system remains operating efficiently without degradation due to undetected corrosion.
  • Control your MRCOOL DIY anywhere, on your Android or Apple smart device, with the new MRCOOL Remote app.
  • MRCOOL DIY temperature compensation technology help keeps you comfortable in any weather conditions.
  • Low ambient cooling: cooling down to 5°F - this feature makes the MRCOOL DIY the ideal system for computer server rooms, greenhouses, and any other application that requires cooling all year.
  • Gold fin condenser: corrosion resistant, condenser is built to resist long term corrosion.

Editor's Notes

Written by persian_mafia | Staff
  • About this deal:
    • This matches the previous Frontpage Deal from several days ago.
    • Our research indicates that MRCOOL DIY 18K BTU Mini-Split Air Conditioner and Heat Pump with Wi-Fi Smart Controller is $268.01 less (~17% Savings) than the next best price from a reputable merchant with prices starting from $1568 at the time of this posting.
  • About this product:
    • Includes 7-year compressor warranty and 5-year parts warranty.
    • Will be Delivered in Two Boxes.
  • About this store:
    • To view the Costco return policy click here. -Corwin

Original Post

Written by Fourgonbound
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for their Members: MRCOOL DIY 18K BTU Mini-Split Air Conditioner and Heat Pump with Wi-Fi Smart Controller (DIY-18-HP-230AE) on sale for $1299.99. Shipping is free.

Thanks community member Fourgonbound for sharing this deal

Note, you must be a Costco Member and signed into your account to view sale pricing and purchase at sale price. Refer to the forum thread for additional deal ideas and discussion.

Key Features:
  • The MRCOOL DIY series comes with pre-charged line sets alleviating one major obstacle to amateur installation in a single stroke.
  • Functionality for Apple and Android smart devices; works with Amazon Alexa; works with Google Assistant.
  • Refrigerant leakage detection ensures your system remains operating efficiently without degradation due to undetected corrosion.
  • Control your MRCOOL DIY anywhere, on your Android or Apple smart device, with the new MRCOOL Remote app.
  • MRCOOL DIY temperature compensation technology help keeps you comfortable in any weather conditions.
  • Low ambient cooling: cooling down to 5°F - this feature makes the MRCOOL DIY the ideal system for computer server rooms, greenhouses, and any other application that requires cooling all year.
  • Gold fin condenser: corrosion resistant, condenser is built to resist long term corrosion.

Editor's Notes

Written by persian_mafia | Staff
  • About this deal:
    • This matches the previous Frontpage Deal from several days ago.
    • Our research indicates that MRCOOL DIY 18K BTU Mini-Split Air Conditioner and Heat Pump with Wi-Fi Smart Controller is $268.01 less (~17% Savings) than the next best price from a reputable merchant with prices starting from $1568 at the time of this posting.
  • About this product:
    • Includes 7-year compressor warranty and 5-year parts warranty.
    • Will be Delivered in Two Boxes.
  • About this store:
    • To view the Costco return policy click here. -Corwin

Original Post

Written by Fourgonbound

Community Voting

Deal Score
+64
Good Deal
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Top Comments

BarryB7266
15Comments
14Reputation
This advice applies very well to conventional ac units that only have 1 speed, or the "new innovation (lol)" of having two whole speeds. But with mini split inverter technology they can run at virtually any variable speed. That's what makes them whisper quiet most of the time. You still don't want to go too big because they will get that swampy/musty smell in them from running too slow constantly, but they are definitely more forgiving than the huge central ac units that the industry refuses to admit is archaic. I converted my house over years ago from an 8 SEER unit from 1995 to multiple mini splits that all run at 19-22 SEER. Energy bill is a third what it used to be or less and I did not have to spend 8-15k dollars on a 13 SEER "modern" central unit that would have saved me far less per month. Was able to afford each unit with cash every few months and did not have to finance a thing. If one dies, it's a small relatively cheap fix and you upgrade to the newest technology. These are a win-win all around in my opinion.
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C2F
64Comments
46Reputation
1) Mini split systems can be oversized. It will not affect humidity removal like it does with standard on/off single stage compressor systems.

A 18,000 btu mini split I installed can perform a minimum of 5,400 BTU's.
I'm not saying install a 18k system where a 6K is needed, but installing a 18k system where you need 12K will not cause you to have high humidity.

2) 700sq feet per ton should not be used for everyone. Region and building design determine cooling and heading load. Parts of Michigan with great insulation may only need 1 ton per 1,000 sq ft. An area of Texas with bad insulation may need 1 ton per 300- 350 sq feet.

3) You must also factor in heating performance in your region and unit specifications. A 12,000 BTU cooling unit may get 16,000 BTU of heat at 47F, however it may drop to 8,000 BTU at 5F.
Go to Comment
bbbc
221Comments
92Reputation
Bought the 24K, but wish they'd sell the 12K since I think 18K would be too much for a bedroom.

18K = $1,299.99
24K = $1,499.99
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233 Comments

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Jul 13, 2021 7:06 AM
495 Comments
Joined Mar 2005
calxtremeJul 13, 2021 7:06 AM
495 Comments
Quote from jtree1 View quoted comment :
You don't want to oversize an AC system. Part of what cools a room is the heat being pumped from the inside to the outside, but the other part is the humidity being removed. If you get an oversized system it won't cycle on long enough to remove the humidity so you will end up putting the temperature lower than you really need just to get the system to turn on longer so it will remove the humidity. For a 1-story structure you can get 700 SqFt per 1 ton. I do not see the tonnage of these units so you may need to contact them to find out. The heating is measured in BTUs.

That's typically true, but these are high efficiency units that have variable speed compressors. They can run at lower speeds instead of constantly triggering on and off.
Jul 13, 2021 12:19 PM
7.6K Comments
Joined Aug 2007
lotsalotsadealsJul 13, 2021 12:19 PM
7.6K Comments
Quote from jtree1 View quoted comment :
You don't want to oversize an AC system. Part of what cools a room is the heat being pumped from the inside to the outside, but the other part is the humidity being removed. If you get an oversized system it won't cycle on long enough to remove the humidity so you will end up putting the temperature lower than you really need just to get the system to turn on longer so it will remove the humidity. For a 1-story structure you can get 700 SqFt per 1 ton. I do not see the tonnage of these units so you may need to contact them to find out. The heating is measured in BTUs.
BTU's
12k=12000=1ton

Quote from calxtreme View quoted comment :
That's typically true, but these are high efficiency units that have variable speed compressors. They can run at lower speeds instead of constantly triggering on and off.
Still applies.

The only reasons to oversize(in a normal residence):
Is in Arizona(or similar) heat and lots of opening closing/poorly insulated.
If using these as heating units more than cooling.

Details on
18K unit [neep.org]
24K unit [neep.org]
Last edited by lotsalotsadeals July 13, 2021 at 05:27 AM.
1
Jul 13, 2021 2:36 PM
13 Comments
Joined Sep 2018
schmnrJul 13, 2021 2:36 PM
13 Comments
Quote from Fourgonbound View quoted comment :
The overstock one isn't a DIY one so you'll have to hire (most likely) an HVAC technician to put some refrigerant in the line.
They all come pre-charged for a certain length of line set. Only time you would have to have it filled with more refrigerant is if you have a longer run to make. If you have a longer run you can't use a DIY version anyways. The non DIY versions just need the line set vacuumed, which is about a 30 min process with a cheap vacuum pump.
Jul 13, 2021 2:39 PM
30 Comments
Joined Jan 2015
evanl16Jul 13, 2021 2:39 PM
30 Comments
How long is the line set on this?
Original Poster
Jul 13, 2021 2:57 PM
334 Comments
Joined Dec 2018
Fourgonbound
Original Poster
Jul 13, 2021 2:57 PM
334 Comments
Quote from evanl16 View quoted comment :
How long is the line set on this?
25 feet
Original Poster
Jul 13, 2021 3:06 PM
334 Comments
Joined Dec 2018
Fourgonbound
Original Poster
Jul 13, 2021 3:06 PM
334 Comments
Quote from schmnr View quoted comment :
They all come pre-charged for a certain length of line set. Only time you would have to have it filled with more refrigerant is if you have a longer run to make. If you have a longer run you can't use a DIY version anyways. The non DIY versions just need the line set vacuumed, which is about a 30 min process with a cheap vacuum pump.
I thought you also had to mess with the copper line (deburr it or something). And I think I read that if you get the non-DIY version and it's not installed by a licensed guy then warranty isn't good.
Jul 13, 2021 4:06 PM
444 Comments
Joined Jan 2016
Erlarson85Jul 13, 2021 4:06 PM
444 Comments
Jackpot. Was bummed about missing the 18k, grabbed the 24k this time.

I have a 1500sq ft cabin with 22 ft tall ceiling and too many old windows. I was going to spend $8k this year on half the windows and still have a problem heating and cooling the place. This 24k should put a huge dent in that need.
Last edited by Erlarson85 July 13, 2021 at 09:09 AM.

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Jul 13, 2021 4:25 PM
32 Comments
Joined Nov 2020
RedMachoDevil1Jul 13, 2021 4:25 PM
32 Comments
Quote from Fourgonbound View quoted comment :
The overstock one isn't a DIY one so you'll have to hire (most likely) an HVAC technician to put some refrigerant in the line.
the description of the item on overstock says:
"Pre-charged w/ eco-friendly R410 refrigerant"
Jul 13, 2021 4:27 PM
34 Comments
Joined Jun 2019
SplendidApple208Jul 13, 2021 4:27 PM
34 Comments
First time caller, long time listener.

I have a 750sq ft garage with a split 70/30 of 14' and 12' ceilings (all walls and garage doors are insulated). I am just north of Denver and would like the best unit for heating (maintain 50°F throughout the winter) and cooling (maintain 70°F while I am working in there, otherwise 80°F). Had I not read all the previous threads about being careful not to oversize, I would have sprung for the 24k without a doubt - but now I have my doubts. The 24k has a higher BTU rating at lower temperatures, which I figured would be beneficial for my needs.

For the record, I tried a 18k BTU window unit in my service door and built a frame to hold the unit. Unfortunately, even starting it at 5am at full blast it was only able to take 4-6°F off of the ambient temperature when the temperature was 95+ outside.
Jul 13, 2021 7:08 PM
426 Comments
Joined Aug 2005
xxxxxxJul 13, 2021 7:08 PM
426 Comments
This was debated in the previous thread from a few days ago. Does anyone know, FOR SURE, if these units are 3rd gen units?

Thanks.
Jul 13, 2021 7:48 PM
1 Comments
Joined Jun 2020
VioletPear1047Jul 13, 2021 7:48 PM
1 Comments
Quote from sam88 View quoted comment :
How does it compared to the Aux 12000BTU one? It's $549 after 15% off coupon at Overstock.com: https://www.overstock.com/Home-Ga...:CartItems [overstock.com]
Yes, I wanted to know the same!
Jul 13, 2021 7:58 PM
1.9K Comments
Joined Apr 2007
topchoJul 13, 2021 7:58 PM
1.9K Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from xxxxxx View quoted comment :
This was debated in the previous thread from a few days ago. Does anyone know, FOR SURE, if these units are 3rd gen units?

Thanks.
SEER 20. They have to be third generation
1
Jul 13, 2021 8:37 PM
2.2K Comments
Joined Mar 2006
nebody00Jul 13, 2021 8:37 PM
2.2K Comments
Quote from SplendidApple208 View quoted comment :
First time caller, long time listener.

I have a 750sq ft garage with a split 70/30 of 14' and 12' ceilings (all walls and garage doors are insulated). I am just north of Denver and would like the best unit for heating (maintain 50°F throughout the winter) and cooling (maintain 70°F while I am working in there, otherwise 80°F). Had I not read all the previous threads about being careful not to oversize, I would have sprung for the 24k without a doubt - but now I have my doubts. The 24k has a higher BTU rating at lower temperatures, which I figured would be beneficial for my needs.

For the record, I tried a 18k BTU window unit in my service door and built a frame to hold the unit. Unfortunately, even starting it at 5am at full blast it was only able to take 4-6°F off of the ambient temperature when the temperature was 95+ outside.
A 24K BTU unit would probably work for you. Using a 24K BTU Minisplit unit (Pioneer with 20.5 seer) in a sun room that is about the same size as your garage but uninsulated and has multiple windows. Initially I thought it was overkill but the high ceilings made me go with a 24K BTU unit. It cools down the entire room very fast and last week when it was a heat wave was able to maintain 75F. Eats about 1.2 kW while cooling on average but heating it can eat up to 2-3kW.
Last edited by nebody00 July 13, 2021 at 01:40 PM.
Jul 13, 2021 9:20 PM
87 Comments
Joined Nov 2015
mikeworkman01Jul 13, 2021 9:20 PM
87 Comments
Quote from nebody00 View quoted comment :
A 24K BTU unit would probably work for you. Using a 24K BTU Minisplit unit (Pioneer with 20.5 seer) in a sun room that is about the same size as your garage but uninsulated and has multiple windows. Initially I thought it was overkill but the high ceilings made me go with a 24K BTU unit. It cools down the entire room very fast and last week when it was a heat wave was able to maintain 75F. Eats about 1.2 kW while cooling on average but heating it can eat up to 2-3kW.
Do you have any issues with humidity not being removed by the more powerful unit?
Last edited by mikeworkman01 July 13, 2021 at 02:23 PM.

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Jul 13, 2021 11:28 PM
1.1K Comments
Joined Nov 2011
topshelf207Jul 13, 2021 11:28 PM
1.1K Comments
Quote from Fourgonbound View quoted comment :
I thought you also had to mess with the copper line (deburr it or something). And I think I read that if you get the non-DIY version and it's not installed by a licensed guy then warranty isn't good.
This depends on the manufacture.

I installed a Senville unit that wasnt not a DIY unit myself this past spring. It came pre flared and deburred. I would say I only have average DIY experience although probably more electric experience than most.

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