[Equest-users] District Heating / System Type

[Bishop, Bill]

Brendan,

 

Based on building type, it sounds like you've determined that your
LEED/Appendix G baseline system is either System 5 or 6.

If the proposed system is designed with a boiler loop connected only for
"backup" - primary system failure, maintenance, or future expansion -
then Electric and Other - System 6.

If the proposed system is designed with a boiler to meet peak heating
loads beyond the capacity of the heat pumps, then you have
Fossil/Electric Hybrid or Purchased Heat - System 5.

If System 5, AND if you believe your boiler system is a District or
Campus Energy System (DES) per the "Treatment of District or Campus
Thermal Energy..." document, AND if you use Option 1 per said document,
AND if you have District Heating only per Table 3, then no changes are
required to the Appendix G baseline system - System 5.

 

Regards,

Bill

 

  <mailto:wbishop at pathfinder-ea.com> 

 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Hall,
Brendan
Sent: Wednesday, November 16, 2011 3:25 PM
To: equest-users
Subject: [Equest-users] District Heating / System Type

 

Long time listener, first time caller. I have a gray area in what system
I should be using for my baseline and wanted to poll the general
consensus. I have a building addition where my proposed system is
electric heat pumps with supplemental heat from a natural gas boiler for
when it is real cold / peak heating load. My first thought is that it
should be a fossil / hybrid system (Sys 5). However this boiler that I
am using as a backup is the primary heat for the existing building, and
is across the LEED boundary. If I use option 1 of the district heating
guidelines it says I should treat this heat from the boiler as purchased
heat. If I do that do I need to change my baseline system to electric
only heat? Thanks.

 

Brendan Hall, M.Sc., LEED AP BD+C
Engineer, Mechanical

karpinski
ENGINEERING

 

3135 Euclid Avenue
Cleveland, OH  44115
P  216.391.3700 x 3111

E   bhall at karpinskieng.com <mailto:bhall at karpinskieng.com> 
W www.karpinskieng.com <http://www.karpinskieng.com/> 

 

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