thermostatic heads vs. central thermostat

ALH_4

You can run the GB142 continuous circulation on outdoor reset and let the thermostatic heads do what they are designed to do. Be sure to set the heating curve so that the tenants cannot turn the heat up to 90° and open the windows to cool things off when needed. There are thermostatic heads on every radiator?

The only drawback is that heating the upper level better will probably cause the utility bill to increase.

Chad W. Campbell

thermostatic heads vs. central thermostat

I have a Buderus GB142 in a duplex, where the central thermostat on the first floor controls the temp for the whole building, and when the temp reaches 72 degrees on the first floor unit (where I reside) it shuts down the boiler so often the separate upper floors of the other duplex unit remain colder. I've been told by a local boiler person that by changing the temp control over to thermostatic heads on each radiator, (the thermostatic heads are already on each radiator now) vs. using the central thermostat will cause the radiators on the upper floors to heat their respective areas thus warming each of those areas to the setting dialed in on the thermostatic head and subsequently warming up the upper unit to the correct temp. Does this make sense? It seems plausible to me, but wanted a second opinion.

Chad W. Campbell

thermostatic radiator heads settings

Thanks Andrew for the info, I'll definitely set the heating curve so the tenants will have a ceiling of where they can set the temp. Where do I go to set the outdoor reset? As to your question, there are 13 total radiators, 12 of which have thermostatic heads, only one doesn’t, and my boiler guy said that was a good thing. He also said that even though the boiler will be on constant circulation, it will be in a more steady capacity vs. modulating up and down, firing on and off, and he said that this could even cause a lowering of the utility bill. I live in Seattle, not all that cold here for the most part, stays in the mid to high 30’s in the winter.

Mike T., Swampeast MO

Your GB does not necessarily have outdoor reset capability, instead using the main control unit (thermostat) for indoor reset.

Outdoor reset is an option to the GB that may prove necessary in your situation.

Proper placement of the main control unit (when outdoor reset is not used) is essential and could be very difficult in a duplex; especially if there is no common space like a good sized entry hall.

J.C.A._3

Mike T.

All of the GB142 boilers I've been getting lately are coming with the AM10 (outdoor reset) control included. If you choose to do indoor reset, the RC10 control is now an "Extra". Chris