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Outdoor Lifestyles by Hearth & Home Technologies Inc. • Lanai 48 See Thru Installation Manual • 4113-901 Rev. D • 8/21
B. Addendum
16’
20’
12’
20’
1. Add lengths of the outside
living space.
16’+20’+16’+20’=72’
2. Divide the open area length
by the total outdoor living
space.
20/72=
.28
.28 is less than the .30 required
and therefore this installation
would not be approved.
1. Add lengths of the outside
living space.
12’+20’+12’+20’=64’
2. Divide the open area length
by the total outdoor living
space.
20/64=
.31
.31 is greater than the .30
required and therefore this
installation would be approved.
How to Calculate the Minimum Opening Needed In an Outdoor Living Space
30% (or .30) of the outdoor living
space periphery needs to be
open.
