Customer reviews from Sampling program
Keystone - Summit 115V 400 Sq. Ft. 9,000 BTU Smart Mini Split Air Conditioner 10,000 BTU Heater 23 SEER2 - White
Average customer rating
5
(7 Reviews)
Rating breakdown 7 reviews
5 Stars
7
4 Stars
0
3 Stars
0
2 Stars
0
1 Star
0
Customer Reviews for Keystone - Summit 115V 400 Sq. Ft. 9,000 BTU Smart Mini Split Air Conditioner 10,000 BTU Heater 23 SEER2 - White
Customer Rating
5
Great ac
on October 26, 2026
Posted by: SaraS
[This review was collected as part of a promotion.] I wasn’t able to install myself due to recent surgery but had someone come install , took them about 2 hours and it’s great
I don’t have central ac and this cooled down my open living room super fast , I have extremely high ceilings and a decent size living room … on a very hot day took about 2 hours for the room to get nice and cool
It’s coverts about a room size of 16x13 for me , I’m still calculating the cost of what it takes to run but it’s a life saver of the hot hot days
Written by a customer while visiting Sampling program
Customer Rating
5
Great Mini Split
on October 11, 2026
Posted by: StephanieA
[This review was collected as part of a promotion.] This Keystone mini split was the perfect size for an extra bedroom that stays hot in the summer. It was light enough to be handled by one person but feels well built and sturdy. The installation was pretty straightforward and took some time and patience.
My favorite part is the remote with timer and cooling and heating ability. It runs quietly and cools the room quickly. I’ve only had it for a short time but very satisfied so far. Just waiting for winter to try out the heater.
My favorite part is the remote with timer and cooling and heating ability. It runs quietly and cools the room quickly. I’ve only had it for a short time but very satisfied so far. Just waiting for winter to try out the heater.
Written by a customer while visiting Sampling program
Customer Rating
5
Quiet, efficient, quick performer
on October 7, 2026
Posted by: JeanL
[This review was collected as part of a promotion.] Installation of the unit itself is not terribly difficult (though we found the template to be inaccurate size), but you definitely will need an electrician or AC specialist to finish it off (and to not void the warranty). Or just hire someone to install the whole thing. The interior unit is sleek and clean looking. It does require it to be certain distances from ceilings, corners, etc. The exterior unit comes with way longer tubing than most will need. I plan to have the exterior tubing shortened so it’s not all just coiled up like that. The unit is quiet, cools the space off very quickly (it’s in our new shed). I like that it has voice control ability, but that seems to only work with Alexa or Google Home, which we don’t have, so we will probably just stick with using the remote…though we might use the app as well. It’s quiet, too! It’s super hot here in south Alabama right now, so we haven’t tried out the heat aspect, but I imagine it will work just as well as the AC. It’s also great that it’s energy efficient, as we don’t want a huge power bill because we decided to climate control our new shed. Bottom line: I recommend it and would purchase another one if I needed one.
Written by a customer while visiting Sampling program
Customer Rating
5
Overall, it stands out as an energy-efficient, whisper-quiet alternative to traditional window units or portable air conditioners for moderate-sized spaces.
on September 27, 2026
Posted by: LanaD
[This review was collected as part of a promotion.] Key Performance Features
The unit delivers up to 23 SEER2 efficiency, utilizing inverter compressor technology to modulate power consumption rather than switching on and off repeatedly. This lowers energy usage while maintaining a steady room temperature. Its operating range spans outdoor temperatures from 5°F to 131°F, providing reliable heat during cold snaps and strong cooling capacity during high summer heat.The Keystone Summit 9,000 BTU Ductless Mini-Split System is a high-efficiency solution for heating and cooling single rooms up to 400 square feet, such as additions, home offices, bedrooms, or detached workshops.
The unit delivers up to 23 SEER2 efficiency, utilizing inverter compressor technology to modulate power consumption rather than switching on and off repeatedly. This lowers energy usage while maintaining a steady room temperature. Its operating range spans outdoor temperatures from 5°F to 131°F, providing reliable heat during cold snaps and strong cooling capacity during high summer heat.The Keystone Summit 9,000 BTU Ductless Mini-Split System is a high-efficiency solution for heating and cooling single rooms up to 400 square feet, such as additions, home offices, bedrooms, or detached workshops.
Written by a customer while visiting Sampling program
Customer Rating
5
Amazing Heating and Cooling Unit
on September 16, 2026
Posted by: TammyC
[This review was collected as part of a promotion.] The Keystone Summit 9000 BTU 400 square foot mini split AC heat pump. It is an amazing unit that provides both cooling in the summer and heat in the winter. I decide to have it installed in my shed/ workshop. I can now use my workshop any day of the year on the hottest of days and the coldest of days. Is super quiet. You don't even know it's running. Does require professional installation from an HVAC professional. Amazing unit that I would highly recommend and the description is just as described.
Written by a customer while visiting Sampling program
Customer Rating
5
Great addition to our space!
on September 6, 2026
Posted by: JennC
[This review was collected as part of a promotion.] Installation of this mini split was done by just one person with easy instructions through the process. I’m excited to use the systems app to operate on a day to day basis. When running the system is quiet and quickly cools down the room. Very satisfied customer!
Written by a customer while visiting Sampling program
Customer Rating
5
Great size and scale for an ADU/guest house
on September 4, 2026
Posted by: RicciT
[This review was collected as part of a promotion.] This mini-split unit is the perfect size and scale for an ADU/guest house. It’s such a convenient way to condition and heat a space without the hassles of installing ductwork.
I love the design of the product as it blends into the walls. As a designer, I really appreciate its compact footprint. The included remote is responsive and easy to adjust the temperature.
I love how there’s even an anti-mildew and clean features. Overall, this is the perfect BTU for my garage to ADU conversion, and DIYers, homeowners, designers, and contractors will really appreciate this unit.
I love the design of the product as it blends into the walls. As a designer, I really appreciate its compact footprint. The included remote is responsive and easy to adjust the temperature.
I love how there’s even an anti-mildew and clean features. Overall, this is the perfect BTU for my garage to ADU conversion, and DIYers, homeowners, designers, and contractors will really appreciate this unit.
Written by a customer while visiting Sampling program