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If I go with a Mitsubishi Mini-Split system, should use a Kumo cloud thermostat or opt for something else?

Aston01 | Posted in Mechanicals on

I am going to have a multi zone Mitsubishi system installed and I have heard mixed reviews on the Kumo cloud thermostats. The current system I have is running a Nest. These are ducted indoor units.

Is there any particular reason to lean one way or another?

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Replies

  1. walta100 | | #1

    I recall someone posted a graph of their energy usage with Kumo it was clear Kumo use had crippled the units ability to modulate its heat output to match the building load forcing the mini to inefficiency cycle on and off.

    You may find the two threads I have linked to interesting.

    https://www.greenbuildingadvisor.com/question/remote-accessible-thermostat-options-for-mitsubishi-multisplit

    https://www.greenbuildingadvisor.com/question/kumo-cloud-controllers-dont-support-dual-band-2-4-5-ghz-or-5-ghz-routers-really

    Walta

  2. walta100 | | #2

    Skip the multi zone system one unit one compressor setup have much greater ability to reduce their output to match the load than the multi head units and operate more efficiently. You also get the benefit of redundancy when you have a failure only 1 head will stop working instead of all of them stop working at the same time. It will cost more but not that much more.

    Be very careful not to except a massively over sized system with a head placed in every room.

    I think heat pumps work best when you set the temp and forget it unless you will be away for several days.

    Walta

    1. Aston01 | | #3

      I was actually going to go to a 3 indoor 1 outdoor design, but someone mentioned something similar. I am going to end up with a 1:1 for 2/3 of my load & 2:1 system for the remaining 1/3.

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