Double layer poly should have how much space between layers for proper inflation and full insulation?
A. 1 inch
B. 12-14 inches
C. At least 2 feet
D. 6-8 inches
Answer: D. 6-8 inches
Biology Questions and Answers.
A. 1 inch
B. 12-14 inches
C. At least 2 feet
D. 6-8 inches
Answer: D. 6-8 inches