Would like to get new themostat for hydronic heat system

krynsky

Hello,



I'm hoping you guys could help me with a question.  I have a 5 year old townhouse in Seattle and

it has a Hydronic Heating system with a bunch of zones.  Each thermostat controls one zone....At least I'm pretty sure it's referred to as a Hydronic system.  The sellers always seem to list as "radiant heat" but it's not floor heating, rather there's tubes going thru the walls and a fan blows over the hot tubes to produce the heat.



I'd like to upgrade from the old style rotary control

panels the system came with the system to a programmable thermostat for at

least some of the zones.  I was thinking

a model like this one (Luz TX9000TS)



<a href="http://www.amazon.com/Lux-Products-TX9000TS-004-Programmable-Thermostat/product-reviews/B000I7MANA/ref=cm_cr_dp_all_helpful?ie=UTF8&showViewpoints=1&sortBy=bySubmissionDateDescending">http://www.amazon.com/Lux-Products-TX9000TS-004-Programmable-Thermostat/product-reviews/B000I7MANA/ref=cm_cr_dp_all_helpful?ie=UTF8&showViewpoints=1&sortBy=bySubmissionDateDescending</a>





It says it works with two wire hydronic heat systems but not 3

wire.  Frankly I'm not sure what the

difference is and I havnt taken apart one of my wall units to look around.  I was hoping you guys had seen enough of

these town home hydronic systems to let me know whether a typical thermostat

like the one above should work fine and if there's anything special I need to

look out for.



I don't know what company installed the system it was

already in place when we moved in.  But

we've had a few townhouses over the years and they've all had these systems in

place so I'm certain it's extremely common around here.





Thank you in advance,