Pentair spa heater User Manual
Page 19
Rev. E 2-7-01
P/N 471048
19
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SHEET METAL
BLOCKS
(LAID WITH ENDS UNSEALED AND JOINTS MATCHED
HOLLOW MASONARY BLOCKS, NOT LESS THAN 4" THICK
HIGH PERFORMANCE HEATER
24 GA. (MIN.) GALVANIZED SHEET METAL.
FOR AIR CIRCULATION). COVER BLOCKS WITH
6" Min.
6" Min.
TM
BASE FOR USE ON
COMBUSTIBLE FLOORS