Design phase: no unit has been built or measured yet. Help build the first one

Tier 12 zonesPiezo grid

Duo Reference

For experienced builders: reference PCBs and the best biometrics.

Coldest water
~18.5 °C*
sleeper in bed, 25 °C room · model 18.3 °C
Warms to
43 °C
the safety cap, for every kit
Peltier input
230 W
per zone at full cooling · within 80 % of the supply
Kit check
Claims hold
checked in CI against the thermal model

* Model estimate. No prototype of this kit has been built or measured yet.

Specs from the kit file

Tier1 · reference PCBs
Zones2
Peltiers per zone4
Heatsink0.07 K/W per zone (estimate until measured)
Current cap5 A per Peltier · 20 A per zone
SensingPiezo grid
Power supplies24 V 750 W in a closed power module + aux 100 W

Open duo-reference.toml in the repository

Coldest water by room temperature

Coldest reachable water by room temperature, sleeper in bed. Model estimates.
RoomDuo Reference
20 °C room16.4 °C 227 W/zone
25 °C room18.3 °C 230 W/zone
28 °C room19.4 °C 232 W/zone
30 °C room20.2 °C 233 W/zone

What you need, by role

Parts are listed by the job they do. Each role has example parts with a verification status; pick any part that meets the requirement.

Build this kit

Read the safety concept, complete the commissioning checklist, then tell us how it went. A build report with measurements is the most valuable contribution right now.