Boiler zone valves

Mikestudent

Bought a place last year in CO.  Boiler system (HTS).  No issues here, I've been in the trade for 30+ years.  You'd think I've seen it all but well, I could use some help.  6 zones are fed off the boiler, thermostat is in the family room.  Boiler fires whenever the thermostat calls naturally based on the family room stat.  I'm thinking about individual zones and adding a bypass to the boiler.  Baseboard heat in all areas, so it's warm in some areas and cool in others.  I'm looking for a suggestion for 3/4" sweat angle valves that can take on a electronic actuator (thinking either zigbee or WiFi).  I don't have a lot of space in the radiators so.,,.

I've looked online but haven't found much.  Any ideas?

EBEBRATT-Ed

You could use TRVs but if it is split into 6 zones why not just put electric zone valves by the boiler.

Mikestudent

Obvious choice, aside from the 1 1/2" boiler supply and return in the mech room. Appears the zones split off under the house. Can't get under, it's only about 16” clearance in the crawlspace.  So yeah, it's gonna suck if I have a leak under there. I'm too old and large to traverse that one. Obvious choice is to add zone valves at each radiator.  

hot_rod

TRVs are a nice option, no wiring required, just one central stat. Or a finely tuned outdoor reset 

GroundUp

1 thermostat = 1 zone. If you don't have 6 thermostats and 6 zone valves/zone circs, you don't have 6 zones. What is it that you do have?