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Controls for slab radiant zone, tenant wants setback
We run hydronic baseboard in the main house, but have an in-law apt with radiant in the slab.
The apt is only about 400sq ft.
In winter, the tenant likes the temperature to be 62 from 11pm-8am, 72 during the day. She can't sleep if it is too warm and will open a window in the middle of the winter.
(Yes I know, slab radiant with a big setback is just asking for pain, well here we are)
The space also has a minisplit with winter heat capability.
I'm thinking of installing a Tekmar 521 with floor sensor, and setting it in floor-only operation with a floor temp of 65 from about 8pm-6am, 75 from 6am-8pm so that the bulk of heating is being done by the radiant and the slab has time to cool and heat, and then letting her run the mini-split to boost as needed.
Please shoot holes in this plan? Is there a better way to get the desired result?