Dear eQuest users,
I have a Baseline Building that is System 3 (as per ASHRAE 90.1-2004)
with DX cooling and gas furnace heating. Whenever I change the heating
from furnace heating to VAV with a Hot Water Boiler in eQuest, the gas
heating usage goes up more than would be expected. I have made other
changes to the model (such as improving the building envelope and
changing the systems) incrementally with expected results. Once I change
the heating type, the gas usage goes up ridiculously. Does anyone have
any idea why this would be happening?
Thanks,
Netty
Netty,
There are a lot of changes between a constant volume unit with gas
furnace and VAV with hot water. Your gas use problem could be on the
air-side or on the water-side. One thing you can try is to do another
wizard run and select VAV and hot water as the system, then compare all
the settings that are generated with those in your model.
Regards,
William Bishop, EIT, LEED(r) AP
I am designing a building with a basement, with windows in window wells.
How do I get equest to allow me to put the windows in the underground
walls? I'm in the detailed data edit mode.
-Jason
Pure guess.
?
The windows are not in the underground wall, as they are not looking at dirt. I would make your basement wall in two sections, underground and above ground. Put the full underground sq.ft and attributes into the below grade wall. Add the above grade wall with a HUGE R value, so it essentially will have little heat transfer. Add the windows to THIS wall.
?
I told you this is a complete guess. I have never tried this before. And unfortunately, have little time ti research it at the moment.
?
I am sure SOMEONE? has done this..
John you're correct. Had to do this a few times. You'll need to create
EXTERIOR-WALL surfaces and attach them to the space. Straightforward to do
in the interface if you have only a few to deal with, but faster to create
in the .inp file if you have several walls & windows to make. Remember to
allow the wall to be large enough to fit the window AND frame.
You'll also need to look at infiltration, since basement spaces in equest
are not given infiltration numbers in the Wizard, you'll need to deal with
that after the fact.
Steven Savich, LEED AP