John "Que" C.
Della Motto 12K unit (on sale): Newbies READ this prior to purchase/install…
Part of my experience is the model I purchased….part is the manual/customer service. The unit Is installed, and working, and putting out VERY cold air, and with a 25ft line-set. The oscillation is a little noisier than I anticipated, but can always be shut off. We’ll see how long it lasts. The bad: Non-existent customer service, installation kit arrived late, and with an inadequate amount of oil (costing me an entire day to find, and $10). The manual was so inconsistence, incomplete, and/or conflicting (regardless of Della product used, and in my case that was 3 of them) that, that issue alone almost derailed this entire install. And, Della’s ACTUAL customer service is only available Mon-Fri, and even, then, unreachable (and I never got a call back from the one message I did leave). The weekend “chat” support is Chinese (or may as well be). It took close to a hour to get 3 questions answered via the chat, two of which weren’t really “answered”, but very nice people, who credited me $30 for my “troubles”. Installing the inside unit is never the hard part with these. However, the template (at least with the Motto unit) is either incorrect, or the design of the Motto is poor, because where the pass-through is drilled on the cardboard template, it will stick out of the bottom of the unit by roughly 3/4”, and doesn’t look “clean”. And, with the Motto, you’ll want to cut the hole on the left, and connect the line set INSIDE the room, with the unit on the wall (The DIY HVAC GUY does a GREAT video on this). There’s just not enough length on line set (12” on the Motto) coming off the unit to bend the pipe out, then fed through to the wall, like 99% of the videos online (hopefully that makes sense): ***This caused a HUGE problem with our install, and, significantly-changes how this model is installed (virtually NO info is available on). It’s also the first time I’ve seen this kind of line set, layout for a mini-split. It’s not harder, it’s just different.*** Customizing the line-set/re-flaring: This is my first Della mini-split install, but my 3rd mini-split install over-all, and while ALL line-sets are “sensitive”, I’ve NEVER seen/used copper SO incredibly-brittle, and fragile. If you’ve got to cut/flare your fittings, you’d better make sure you’ve got pro tools to do that job, or you’re VERY skilled with the tools you DO have. It could either be bad luck, with crap Amazon kits (which were recommended), or the HVAC Pro’s make this look VERY easy…but the Amazon flaring kit I got BARELY worked for this install. That could’ve been the horrible-quality, copper, or a bad kit. A newbie will screw it up 4-5x’s….not 10. Same with the demurring tool. Go the extra mile and rent, or purchase/renturn pro tools for that purpose. And, for the newbies at that type of thing, like me, purchase a 3-5ft piece of copper to practice cutting & flaring on, prior to working on the line sets, to familiarize yourself with the tools you ARE using. Just my two cents. That said, of all the issues I had, the cutting/flaring wasted least amount of time. Torque wrench: If you don’t know what you’re doing this (in a HVAC setting) it may as well be French. Again, the manual is horrible. And, weekend chat is worse. But, (at least in my case) the amount of pressure needed to tighten these connectors is FREAKISH (others have commented on this, as well). ***Attn: Della: This is a DIY kit, which means the majority of people installing these units are NOT HVAC Pro’s…..hence the term “DIY Installation kit”. You need to have tech’s available to answer questions (most of which will be VERY simple, and prevent a LOT of unnecessary grief 90% of which is caused by incomplete/conflicting info in Della’s own manuals).*** With ALL that said…. 3-stars because the unit (as stated) IS installed, and working very well….which was the goal. Now, that I’ve installed one, another unit would go much….MUCH smoother, and I’d probably go with a more powerful/efficient unit. This was 12K, unit, that was on sale. I don’t need more power, but the more powerful units seem to be more efficient, and quieter, on their lower settings. My suggestion is stay away from the manual, or use it as a VERY general “check-list”, and watch the “The Kelley’s Country Life” video for the installation kit “How To’s”…and DIY HVAC Guy for how to hang & connect a unit like the Motto where the line set has to be connected in the room, under/behind the unit. And, the wire less app is very practical, and for reasons I’m still learning has a different functionality. I prefer it, so far. Hopefully, this will last at least 7-8yrs. Would be at least 4-stars had it not been for the customer service/manual issues. Good luck! To all going down this road…
Response from DellaApr 16, 2026
Dear Customer, we are very sorry to hear about your experience and sincerely apologize for the frustration and inconvenience this has caused. We take your feedback seriously, especially regarding our customer service and documentation. This is not the level of support we aim to provide, and we will review the issues you have raised to improve our service and instructions going forward. We would also like the opportunity to better understand your situation and provide direct assistance. If possible, please contact our customer support team by phone at your convenience so we can help resolve any remaining concerns. We truly appreciate your time in sharing your feedback, and we hope we can improve your experience with us in the future.




