If don't cosider the price and quality , how to choose thermal actuator( )
A:12v/24v/48v/230v versions.
B:Operation time 3-5min or 30-90sec.
C:No leak under 6 bar
D:Manual opening when power-off
E:one version with A,B,C,D
My choice is E ,do you want to split A,B,C,D?
#underfloor heating
#zone valve system
#heating system
