Infra accordion insulation
Subtitle: equals 7" Rockwool, downward heat flow (summer) : 3 7/10" Rockwool, upward heat flow (winter)
By: Infra Insulation, Inc
Publisher: Infra Insulation, Inc.
Published: 1930
Place of publication: New York City
Language: eng
Subjects: Catalogs; Insulating materials; Inc Infra Insulation
Other titles: Infra insulates against heat, condensation, vapor
Notes: Cover title.

Avery Classics copy: With sample of accordion-format insulation (15 x 5 cm).

Includes specifications.