Master Manual J Load Calculations
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Questions and Answers

Which factor has the greatest impact on cooling load in a house?

  • Heating load
  • Latent load
  • Large windows (correct)
  • Infiltration

In which type of houses are the infiltration rates highest?

  • Wood framed houses
  • Attics
  • Older houses (correct)
  • Single story houses

What are the likely R-values in the attics and walls of a house built in 1995 in the Maryland DC Virginia area?

  • Attics R49, Walls R19
  • Attics R13, Walls R30
  • Attics R30, Walls R13 (correct)
  • Attics R19, Walls R11

What percentage of BTUs can be lost through poorly insulated and sealed ducts in an attic?

<p>30% to 50% (B)</p> Signup and view all the answers

When replacing an existing heat pump, what should be done?

<p>Always perform a manual J load calculation (A)</p> Signup and view all the answers

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