San Francisco : Architect and Engineer, Inc · leaf 257
OLIVER M. ROUSSEAU Genera/ Contractor FEBRUARY, 1943 SAL-MOSUPPLY DUCT Non-metallic Supply and Return DuctMaterial for Warm Air Heating, Ven-tilating and Air Conditioning Systems. … Factory folded and packed incartons for protection, conven-ient handling and easy storage. Approved and Listed byUNDERWRITERS LABORATORIES. INC. THIS non-metallic conduit saves metal in mak-ing supply and return duct lines for warm airheating, ventilating and air conditioning systems.It permits…
Architecture · Building
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