Free Area of Grills and Louvres for Air

Answered using GPT-4o mini by AI Answer Generator

Question:

Grills and louvres typically provide how much free area for air?

A. 50-60% B. 60-70% C. 80-90% D. 90-100%

Answer:

Grills and louvres typically provide a free area for air of about B. 60-70%.