<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV><BR class="khtml-block-placeholder"></DIV><DIV>A recent comment:</DIV><DIV><BR class="khtml-block-placeholder"></DIV><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Tahoma" size="3"><SPAN class="Apple-style-span" style="font-size: 12px;">I'm new.</SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Tahoma" size="3"><SPAN class="Apple-style-span" style="font-size: 12px;">it seem ESP-r is not similar to DOEII in dealing with HVAC system of a building, DOEII is simple on this aspects.</SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><BR class="khtml-block-placeholder"></DIV></BLOCKQUOTE><BR><DIV>ESP-r has a different history from DOE2. Some users would note that there are simple approaches to defining environmental systems controls (e.g. ideal zone</DIV><DIV>controls) as well as the component based HVAC. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>The latter has a rather daunting learning curve, but if the question you are asking needs component level details and simulation timesteps in the seconds rather</DIV><DIV>than minutes then the component based HVAC might be useful.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>For a reminder of other differences between ESP-r and other tools look </DIV><DIV>at the US DoE tools directory site:</DIV><DIV><A href="http://www.eere.energy.gov/buldings/tools_directory/pdfs/comparative_paper.pdf">http://www.eere.energy.gov/buldings/tools_directory/pdfs/comparative_paper.pdf</A></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>-ESRU</DIV></BODY></HTML>