On 9/28/2014 10:28 AM, nestork wrote:
Mike:

Indoor/Outdoor reset controls are available for both hydronic and steam
heating boilers.

But I think you're missing one important point. Apartment blocks are
built different than houses. Houses have lumber exterior and interior
walls that have very little thermal mass,

Really??? How about the hundreds of thousands of homes built from other
materials? Stone, block, ICFs SIPS. brick. adobe, concrete, etc.



It's the thermal inertia of your concrete block walls that would prevent
any boiler or boiler control from being able to follow those 24 hour
temperature guidelines you quoted.

Why? It only matters getting the temperature up at the required time,
lag to the lower is not a problem, not does it have to go that low. You
will have to anticipate the time for increase and the boiler will have
to come on before the required time to reach the daily minimum for
daytime.




You can put in an indoor/outdoor
reset control, but it certainly wouldn't be able to modulate the
temperature in your building on a 24 hour basis like that. So, in that
regard, you'd probably be best off to install an indoor/outdoor reset
control, set it to provide a comfortable temperature inside your
building and leave it at that. Trying to change the termpature of all
that concrete every 12 hours or so is simply not going to happen.

It does not have to reach the 55 degree at night, that is a minimum. He
can set it to whatever works and makes sense. I'd think that 62 or 64
minimum would be better in many respects. Happy tenants and easier to
maintain the swings.