[Equest-users] DHW boiler thermal efficiency

Jacob Goodman jacobg at lseng.com
Wed Jul 29 09:00:21 PDT 2009

I've been comparing energy use for different DHW heaters in the DD 
Wizard (eQuest v3.63) and it appears that changing the thermal 
efficiency fraction has no effect on DHW energy usage. However, when I 
go into detailed edit mode and change the Heat Input Ratio under the DHW 
water heater tab the expected change in energy use occurs.

Also, the default value of 80% thermal efficiency in the Wizard displays 
as a 1.37 heat input ratio in the detailed edit mode. Can anyone verify 
this or tell me what I'm doing wrong?

Jacob Goodman , LEED AP
jacobg at lseng.com
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