<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">A recent question:<DIV><BR class="khtml-block-placeholder"></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">::What are the methods to can adjust the absolute humidity in the zone, if it is used to ::humidifier?</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">The answer depends on the use of the word "adjust". One could add a latent</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">casual gain of X watts in the zone operations file to increase the RH in</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">the room. </SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">There are options in the ideal zone control to control RH</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">by adding or extracting X grams of moisture (temperature control is</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">secondary) or with RH control secondary. </SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">The term "absolute humidity" tends not to be used outside</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">of the detailed system components. It would probably not</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">be all that difficult to express this in terms of absolute humidity</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">but no one has implemented this yet.</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">I have noticed a bit a chatter on the site about treating moisture</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">like a contaminate and setting up air flow controls based on the</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">moisture contaminate levels.</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">There are options to include the zone in a detailed system component</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">network and in that context you have quite a few options and you</SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">can track psychrometrics in detail. </SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">Perhaps others in the community will have additional suggestions. </SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV><DIV><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 13px;">-ESRU</SPAN></FONT></DIV></BODY></HTML>