Planned Mini-Splits in 3-unit rental


Old 07-19-18, 12:23 PM
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Planned Mini-Splits in 3-unit rental

I just purchased a 3-unit rental property that currently has a single gas hydronic boiler and cast iron rads. It's on the older side, needs maintenance and has only one zone for all 3 units.

I'm considering getting rid of that whole system and replacing with 3 separate ductless mini-split systems. My reasoning:
* Each unit gets their own heat control (more comfort)
* Each unit gets AC (higher rent & more comfort)
* The tenants can now pay for their own heat & AC (less expense for me)

I do plan on getting a pro in to do the spec and install since it's new to me, and 3 systems will take me way longer to install. But I'd like to have a good understanding of the details.

Apt A
downstairs: 400sq ft - kitchen/eat in kitchen & living rm
upstairs: 270sq ft - 2 bedrooms, bath & tiny hallway

Apt B
downstairs: 280sq ft - kitchen, bath & tiny hallway
upstairs: 409sq ft - 2 bedrooms, extra rm, tiny hallway.

Apt C
studio - 230sq ft - 1 room, bathroom

* Is this a reasonable plan?
* I'm thinking 2 heads for A & B, one upstairs & one downstairs
* The upstairs units will probably go in the hallway, blowing down the stairs. Otherwise they'd have to go into one of the bedrooms, which I'd imagine is not optimal
* Would you do a head in each bedroom? (3 units per apartment)
* Would you add electric baseboard in the bathrooms?

Thanks in advance for any suggestions!

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Old 07-19-18, 06:01 PM
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The one zone for three units definitely has to go. Using ductless units is not the least costliest way to go but makes the most sense in the long run. Otherwise you'd need three boilers and let them use window A/C's.
Installing the second floor unit pointing towards the stairway doesn't sound too effective. You may need to consider one head for each bedroom.

Definitely a small electric heat strip in the bathrooms. The cost is minimal and the tenant has the option to run it or not. No fancy stat.... just the thermostat on the unit.
Old 07-19-18, 07:05 PM
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Thanks Pete, much appreciated!

I was originally considering one head for each room, but from what I've been reading, it seems excessive. But I guess it would be hard to get away without one in each bedroom.

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