Ductless (multi-split) geothermal (GSHP) ?

[geoductless]

Historic house is three-story, 180-years-old, solid brick interior and exterior walls with installed (some badly) ducts. Low-R envelope and resulting high energy $ has driven us toward 9-ton, closed-loop geothermal solution.

And unusual heating and cooling loads and difficulty of installing ductwork through brick walls -- especially to second floor -- make at least partial ductless multi-split from GSHP attractive. (Hydronics alone don't solve cooling need.)

There are plenty of split GSHPs with conventional air handlers available, but seemingly no ductless GSHP systems. Is there a commercial solution? Or would one have to be customed engineered? Seems like some progressive company would have been onto this combination by now.

TIA ... Marc

Is there some insurmountable obsticle preventing the design of geothermal heating
systems which utilized cooling fins and fans piped directly to the area needing the BTU's?

[uaflyer]

The City system looks like the way to go.
After spending 20 minutes writing a reply to be told I am not allowed to post a link, this system threw away my post (

[nexsen]

The City system looks like the way to go.
After spending 20 minutes writing a reply to be told I am not allowed to post a link, this system threw away my post (

Citi Multi water sourced units are 3 phase only aren't they? Or have they come out with single phase units?

[GT1980]

Hydro-Zone is a tm of Hydro-Temp for the chilled water and HW off of a forced-air same-unit system that uses the rfg off the air HX coil with modulated or no blower speed--- just for Mini-like distribution to console fancoils etc... but EER's higher, and the Heat-Reclaim 100% on demand HW IS pushing COP's near 6 as in cooling mode, the loop pumps are off line. 4zn board

Insulated pex to a Hot and Cold fluid fancoil unit, even higher pressure air ducted like a unico/ just better has been done by contractors.

If using UNICO system split air handlers with GTHP "condenser" sections, then up the air coils for heat pumps a ton larger than the Hydro-Temp or other splits.

I f Daiken has their ducts in a row, then their AIR HPump ~therm-- Domestic HW has heat reclaim too whilst Cooling is giving A/C heat rejected to a bronze circulator to a water tank (just not sure of their complete achievement)...

Hydro-Zone(tm) Hydro-Temp has NOW for about 3 years worked well with using VARIABLE compressors controlled by BACNET DDC systems , entirely residential as is institutionally used (that since 2009). Nicely "bug-free" so far.

EER's hit 45 acclaimed: just like many now in the mid 40's; but with heat-recovery (patented 1981, why so few big name users waited to see) heat reclaimed 100% in cooling modes to HW needed puts the EER's into near 55 easily [2:for:1, usage] (even small 2.1/2 ton units run near 24/7 with this off-the-shelf a/c dehumidifyer use making even ice melt at out-door-pads at/in permeters of larger structures in the winter time).

[GT1980]

Just ask if the contractor has used W:W hydronics, or a HYDRO-TEMP of AR, Hydro-Zone(tm) insulated fluid tubing in small areas to a fancoil, -done this set up ever...