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Do you need to input all windows and wall separtely in Rescheck?, Manual J, Manual S, Manual D, Comcheck?

This is a very common question we hear every day on the Reschexpert blog so today we want to discuss whether you should input all your windows or walls as one unit or multiple units in Rescheck, manual j, manual s, manual d, and Comcheck.

If you are working through an energy report you have probably had this question.  Basically in the simplest form you can take this back to the cumulative property of math.  If all your windows are alike and they all have the same energy values then there will be no difference in your mathematical calculations if you enter in 20 individual 15 sq ft windows, or if you enter 300 sq ft windows as one block.

This gets more complicated when you have multiple windows with different energy ratings.  Then you might consider several blocks or breaking each window up individually.  If you are more comfortable listing each unit, go ahead and do so.  

Walls are quite similar.  If you have all walls with one R value then group as many of them together as you feel comfortable with.  If you have multiple walls with different R values then list them separately in your Rescheck, Rescheck Desktop, Rescheck Web, Manual J, Manual S, Manual D, Comcheck, Comcheck Desktop, or Comcheck web software.  The power of mathematics are your friend in that whether a unit is grouped together or listed individually then the result will be the same assuming the inputs are correct.

Thanks again for reading the Reschexpert blog and we hoped you enjoyed this Rescheck Q&A from the a  If you need to order a Rescheck, Manual J, Manual S, Manual D, or a Comcheck simply email a PDF of your plans and a jobsite address to [email protected] and we will get you taken care of today.