Required R Value In Roof Ashrae 90 1

1 ashrae 90 1 2013 3 c407.

Required r value in roof ashrae 90 1.

American society of heating refrigerating and air conditioning engineers ashrae 90 1. State only ma massachusetts 780 cmr chapter 13 5 r 30 state only mi michigan ashrae 90 1 2007 5 r 20 6 r 20 7 r 20 state only mn minnesota minnesota commercial state building code 6 r 30 7 r 35 please see disclaimer on back page. Minimum insulation r value requirements non residential above roof deck. R value based method of section c402 1 3 u c and f factor based method of section c402 1 4.

The r eference manual has been built off work originally done by comnet for the standard 90 1 2016 commercial building energy modeling guidelines and procedures and by cec for the nacm reference manual. The values in these tables apply to buildings that are heated and or cooled as defined in 90 1. Ashrae standard 90 1 energy standard for buildings except low rise. Calculation method nacm reference manual.

C402 1 3 insulation component r value based method c402 1 4 assembly u factor c factor or f factor based method. Ashrae 90 1 also provides prescriptive insulation values for semi heated buildings that are shown in these tables. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope.