I wonder where you added the floor insulation. The basement is being heated by the ground below. If you insulated the basement floor, you have lost the ground heating. If you have a walk out basement, make sure to insurate the exposed basement wall to R12 or more. Ground temperature is generally warmer than the outdoor exposed temperature. Ice is a good insulator at the groun durface. Normal basement wall in Canada is insulated. at least, to one meter below the ground level, to R8 or more. Water mains are buried two meters below ground, and will not freeze in Winter, even when the outdoor temperature is at -18 degree C. Dr. Li To: EnergyPlus_Support@xxxxxxxxxxxxxxx From: vs114@xxxxxxxxx Date: Thu, 2 Jul 2009 10:30:43 -0700 Subject: Re: [EnergyPlus_Support] Add a basement The problem i had and drive me to the solution of "basement"
was that when the floor had NO insulation, i needed 500Kwh for heating. When i added 3mm insulation, i needed 2500Kwh for heating. Is this logical? (warm climate) From: Linda Lawrie <linda@fortlawrie. To: EnergyPlus_Support@ Sent: Thursday, July 2, 2009 8:18:24 PM Subject: Re: [EnergyPlus_ A "walk out basement" might be below grade on one or more walls. There will be a warning message that it can't do the height specific calculations it uses on surfaces/walls. The warning can be ignored. Internet Explorer 8 makes surfing easier. Get it now! __._,_.___ The primary EnergyPlus web site is found at: http://www.energyplus.gov The group web site is: http://groups.yahoo.com/group/EnergyPlus_Support/ Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site. EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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