Peltier element for heating and cooling:
https://www.meerstetter.ch/compendium/heating-and-cooling-with-a-peltier-controller
Parametric design of pump in OPENscad
Peltier element for heating and cooling:
https://www.meerstetter.ch/compendium/heating-and-cooling-with-a-peltier-controller
Parametric design of pump in OPENscad