What is the minimum mass wall R-value for a home being constructed in Niagara county, where 60% of the insulation is located on the interior of the mass wall? (3.5 Points) 17 20 8 13 25.What is the equivalent length of a 4" mitered 90 degree elbow in a dryer exhaust duct? (3.5 Points) 2' 6" 4' 1' 9" 5' 26.Chapter 24 applies to all the following EXCEPT? (3.5 Points) Fuel gas appliances Fuel gas venting systems Liquified natural gas installations Fuel gas piping systems 27.What is the cubic foot of gas flow through an EHD 25 CSST that is 50 foot in length with less than 2PSI of inlet pressure? (3.5 Points) 80 144 62 87