https://communities.bentley.com/products/building/performance/f/hevacomp-forum/139156/heat-interface-unitsHi, Just a query in how to input heat interface units into hevacomp within a Part L SBEM assessment. Currently I have inputted a plant room as its own zone with the system chosen as LTHW Boiler and Nat Gas with the DHWS also same as the heating sourceen-USTelligent Community 12https://communities.bentley.com/thread/421614?ContentTypeID=1Tue, 01 Aug 2017 10:17:30 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:e5550685-9396-4596-a36e-0c0b21003722Duncan Brown<p>HIU isn&#39;t a generator, but rather an &#39;interface&#39; to District Heating - if the rest of the zones rely on the HIU then they should also be set to district heating. If there <em>are</em> individual generators in the other zones then they must be specified.</p><div style="clear:both;"></div>https://communities.bentley.com/thread/421611?ContentTypeID=1Tue, 01 Aug 2017 10:02:05 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:1727367d-cd15-4417-a570-3f1d408de5d1Josh Healey<p>Thanks Duncan, just to get everything right currently I have changed the plantroom (zone 7) heating system and fuel type to District Heating do I change the rest of the zones also to District heating for the system and fuel type also?</p><div style="clear:both;"></div>https://communities.bentley.com/thread/421595?ContentTypeID=1Tue, 01 Aug 2017 08:20:00 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:9398bf36-abbc-4d23-a031-6f40e9345edeDuncan Brown<p>Josh - The HIU doesn&#39;t generate heating or hot water - I would suggest a district heating system would be the better choice.<br /><br />Regards,</p><div style="clear:both;"></div>