[Equest-users] Huge envelope changes having small affect on energy savings

[Ron Pecarina]

>From what I see from these input files, the zone AC/Hr went from 0.2 to
0.8.  I did not note a change in any R-value from 4 to 20.  The increased
ventilation load is the likely culprit.

On Wed, Aug 22, 2012 at 1:42 PM, Lee Chorney <leec at alliedconsulting.net>wrote:

> Hi Guys,
>
> Here all the .inp files. 1.inp is the base and 2.inp is the proposed.
>
> Thank you,
>
> Lee
>
>
> On Wed, Aug 22, 2012 at 12:48 PM, Lee Chorney <leec at alliedconsulting.net>wrote:
>
>> Hi All,
>>
>>
>> I recently did a model where I had the same system in both base and
>> proposed but I changed the R-Value from 4 (base) to 20 (proposed). I also
>> changed the window U-value from .80 (base) to .35 (proposed). After I did
>> the run, I saw only a 5% savings between the heating and cooling use in the
>> model. When I looked at the loads I saw the base had twice as much cooling
>> and heating load than the proposed. Does any know why the energy savings
>> would only be 5% when you have a huge difference between the cooling and
>> heating loads?
>>
>> Thanks,
>>
>> Lee
>>
>
>
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-- 
Ron Pecarina, PE, CEM, LEED-AP BD&C
Energy and Sustainable Design Consultants, Inc.
1128 Noblewood Drive
Billings, MT   59101
406-208-0227
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