Ece,<br><br>What you are looking for is the WaterHeater:Mixed object. This boiler has four ports, one source side inlet and source side outlet for a heat recovery loop or solar hot water heating loop, and one use side inlet and outlet for the demand loop. There is also a heating coil of either natural gas or electric type in order to meet the heating demand when the source side heat transfer is inadequate to serve the load.<br>
<br>Hope this helps.<br><br>

<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:red">JASON KIRKPATRICK, LEED AP BD+C</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:black"></span></p>


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<br><br><div class="gmail_quote">On Wed, Jan 4, 2012 at 8:29 AM, ece k <span dir="ltr"><<a href="mailto:quecen@yahoo.com">quecen@yahoo.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div style="font-size:10pt;font-family:arial,helvetica,sans-serif"><div><span><div>Dear Group,</div><div><br></div><div>I have modeled an office building which is heated by boiler, however I would like to model the boiler with heat recovery for energy efficiency. I have investigated example files of energyplus but I couldn't find any examples for this type of boiler. Therefore I would like to learn if it's possible to model a boiler with heat recovery?</div>
</span></div><span class="HOEnZb"><font color="#888888"><div> </div><div><span style="font-family:tahoma,'new york',times,serif"><span style="font-weight:bold">ece</span></span></div></font></span></div></div><br>
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