I have a kind of off the wall question. First of all, we have a hot water boiler system which is 2 zone (1 upstairs, 1 down). I was wondering if there was such a thing as putting an extra sensor in the bedrooms that would trigger the thermostat to kick on if one of the rooms gets below a certain temp? For some reason after we installed a new boiler, windows, and insulation in the attic (all by contractors) it seems the rooms are colder than they were before. Go figure. We just did this so it is possible we just haven't gotten the right temp adjusted. The stat is located in the hallway but it seems to be OK temp there but not in the bedrooms (usually under 2 degrees). I figured if there was anything that could be done you guys would have an idea. Thanks.

If the hall way and bedrooms are on the same zone, the relative temperatures are going to be the same no matter what you do with the thermostats. You could turn up the one in the hall way to where the hall way was too warm, and then the bed rooms would be warmer. This would be much easier than installing more thermostats.

If you installed a thermostat in the bed room that turned the zone on when the hall thermostat didn't call for heat, the hall is still going to heat up as long as it is on the same loop.

Do you have different loops and balancing valves? If you can open up more flow to the bedrooms or restrict the flow to the hall, then the bedrooms will be warmer.

Before doing anything else, make sure the radiators in the bed rooms don't need air bled out of them.

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Originally Posted by labman

Before doing anything else, make sure the radiators in the bed rooms don't need air bled out of them.

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I'm not sure what this means.

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Originally Posted by labman

Isnip...
Before doing anything else, make sure the radiators in the bed rooms don't need air bled out of them.

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Some systems can get air in them keeping the water from filling them. They have valves to let the air out. It is more likely to be a problem with the highest parts of a system. Air could have gotten in when the new boiler was installed.

Sorry... didn't read "radiator"... thought it was just a vent.

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Before doing anything else, make sure the radiators in the bed rooms don't need air bled out of them.

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Yep, that was going to be one of my steps. The problem is there are no individual bleeders on the radiators.

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You could turn up the one in the hall way to where the hall way was too warm, and then the bed rooms would be warmer. This would be much easier than installing more thermostats.

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I think it might be more that the hallway is getting warmer than the bedrooms. I did turn the temp up today and it did seem to help. Maybe I am going to have to do this.

Actually in writing this I am realizing that if all the bedrooms are now the same temp that maybe by turning the temp up in the hallway will be the solution. Thanks labman.