[Bldg-sim] Do I Include Baseboards in the ASHRAE 90.1-1999 Budget Building?

[Paul Riemer]

I would take 'identical' to mean same type, capacity, schedule, zone depth, and control method.  I do not read 'identical' to mean the absolute same electrical heating consumption values on your ECB form.  If you have thermostatic control of your baseboards, the numbers won't match.

Paul Riemer, PE, LEED AP
DUNHAM

From: Greg Leskien [mailto:greg at zonengineering.com]
Sent: Friday, April 29, 2011 9:38 AM
To: Paul Riemer; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Do I Include Baseboards in the ASHRAE 90.1-1999 Budget Building?

Thanks Paul! I looked up that clause and its very clear that I keep the electric baseboards in. When they say they "shall be modeled identically", I assume they also mean keep the capacities that same, correct?

Greg

From: Paul Riemer <Paul.Riemer at dunhameng.com<mailto:Paul.Riemer at dunhameng.com>>
Date: Fri, 29 Apr 2011 10:33:54 -0400
To: Greg Leskien <greg at zonengineering.com<mailto:greg at zonengineering.com>>, "bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>" <bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>>
Subject: RE: [Bldg-sim] Do I Include Baseboards in the ASHRAE 90.1-1999 Budget Building?

Yes you include them.  90.1-1999 11.4.3.k.(2) round about page 59 says if you have two sources use the primary source to determine your system type but the secondary one stays the same between the two models.
Now I have to get back to office bingo.  Happy modeling.

Paul Riemer, PE, LEED AP
DUNHAM

From: bldg-sim-bounces at lists.onebuilding.org<mailto:bldg-sim-bounces at lists.onebuilding.org> [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Greg Leskien
Sent: Friday, April 29, 2011 9:21 AM
To: bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Subject: [Bldg-sim] Do I Include Baseboards in the ASHRAE 90.1-1999 Budget Building?

Good morning,

I'm in the process of carrying out a simulation using a budget building based on ASHRAE 90.1-1999. In the proposed building, 75% of the annual heating load is met by single zone, gas-fired, constant volume roof top units (with DX cooling). The remaining 25% of the annual heating load is met using electric baseboard heaters. The budget building uses system types 11 (packaged rooftop air conditioner, CV, DX, fossil fuel furnace). I'm wondering what to do with the electric baseboards in the budget building. Do I keep them in just as they are in the proposed building (I.e. same capacities), or do I delete them altogether and force the rooftop units to meet 100% of the annual heating load? ASHRAE 90.1-1999 appears to be silent on this issue.

Thanks and kindest regards,

Greg Leskien, C.E.T.
Project Manager | Zon Engineering Inc.

363 Edwin Street | Kitchener ON N2H 4P5
T: 1-888-338-6363 x702 | F: 1-888-448-2605
C: 1-519-998-0232 | greg at zonengineering.com<mailto:greg at zonengineering.com>
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