[Bldg-sim] PTAC and PTHP EER, fan energy

[Michael Rosenberg]

The EER does include the fan power. The baseline fan power allowance in Appendix G from 90.1 2004 was recognized as being much too high for PTACs and PTHPs. An addendum was issued lowering the value to 0.3 W/cfm. This is captured in the new 2007 version of 90.1 Appendix G.  

Michael Rosenberg
Oregon Department of Energy
625 Marion St. N.E.
Salem, OR 97301-3742
Phone : (503) 373-7809
Fax: (503) 373-7806

>>> "Xu, Xiaowei" <xiaowei.xu at ny.fk.com> 4/17/2008 8:10:25 AM >>>
Hi,

I have a quick question about the EER requirement for the PTAC and PTHP
system. In Standard 2004, Table 6.8.1D gives out the minimum requirement
for the PTAC and PTHP system. My question is does this EER include the
fan power or not?

 

Also for the PTAC and PTHP system, following the Appendix G fan power
energy calculation, the fan power would be about 0.7~0.8W/cfm. However
the manufacture's catalog data usually gives out the value around
0.2~0.3W/cfm, which means the proposed case would get a lot of fan
energy savings. Does this make sense? Thanks a lot.

 

 

Xiaowei Xu

Engineer          

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