Heatpump ARI conditions

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Hi everyone,

I've done a little homework/skimming and am coming up dry on a particular question:

Packaged heatpump performance is defined by ARI Standard 210/240 (for units under 65,000 Btu/h cooling) and ARI Standard 240/360 (for larger heatpumps).

Both the previous 2007 and the current 2015 published versions of these standards have two sets of ambient conditions for heating mode, "high temp" and "low temp." Here's a reference from the 2007 copy (I think 2015 has no changes in this regard):
[cid:image003.png at 01D44B48.ABEA6220]

Here is an example of the sort of capacity and efficiency stats we can expect to see from a manufacturer (this is a packaged heatpump unit by Trane):
[cid:image004.png at 01D44C12.A4B9CF70]

The major question here is... which set of conditions (high vs. low) are expected for developing doe2/eQuest gross capacity and HIR inputs? Put another way, are the curves in the library built around one of these specific condition sets? I've always used the higher capacity set (High temp), but when I went to confirm against the doe2 reference entries for these inputs I didn't see anything specified other than "ARI conditions."


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Nick Caton, P.E., BEMP
Senior Energy Engineer
Regional Energy Engineering Manager
Energy and Sustainability Services
Schneider Electric

D 913.564.6361
M 785.410.3317
F 913.564.6380
E nicholas.caton at schneider-electric.com

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States

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