[Equest-users] Under heating

Karen Walkerman kwalkerman at gmail.com
Thu Dec 4 10:14:46 PST 2008

If you look at your SS-O report, it will show you when your spaces are over
or under-heating.  I have found that often I am over or under cooling during
startup periods, i.e. my equipment is sized appropriately for loads at
constant indoor temperatures, but if I'm trying to heat the building 5
degrees in 1 hour, I may have some problems.

Also, in packaged systems, I have found that some of the spaces without a
thermostat often have unmet load hours.  I believe this is due to the fact
that eQuest doesn't always accurately model airflow through each zone.
Usually, when I model multiple rooms served by a single system (heat pump,
for example), I model the rooms as one zone together.  I feel that this is
appropriate as long as the spaces have similar use type, exposure and

One last thing--if you have baseboards and you added them after the wizard,
you will need to specify the thermostat type to "Thermostatic" and give the
baseboards a capacity, otherwise, the spaces will get no heat.


On Thu, Dec 4, 2008 at 1:07 PM, Patrick Darby <pdarby at twfp.com> wrote:

>                  Hello All,
> After Simulation and looking through reports SS-R and SS-O, I have had a
> continuing problem of under heating in my Thermal Zones. I have allowed my
> boiler capacity, all my heating coils, my heating pump parameters to default
> and DOE size, but these actions are of no resolve to the under heating.
> Has anyone else ran into this problem, and found a reasonable solution to
> the problem of under heating?
> Thank you for any help.
>     *Patrick Darby, BScE*
>              Mechanical Engineering Services
> * The Walter Fedy Partnership *
>  Phone: 519-576-2150 x271
> Fax: 519-576-5499
> Web: *www.twfp.com* <http://www.twfp.com/>
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