Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 613
Fig. II. PERFECT PIN INDIRECTDIMENSIONS OF PERFECT PIN INDIRECT Heating Surface per section 20 feet12 feet Length 41% in.41% in. Width ofBody 12 in. 7y2in. Width atHubs Centers 3% in. 2% in. … TAPPING LIST All openings will have right-hand threads, unless other-wise ordered. Unless otherwise specified, all radiators will be tapped asfollows: Fig. 12. TRITON DIRECT-INDIRECT RADIATORApplied to Triton Three-Column only MEASUREMENTS ON BOX BASE Opening at back for fresh air inlet to wall box…
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