W415-1066 / A / 03.06.12
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wHEN INsTALLINg A sYsTEM FOR MAkE Up FREsH AIR, THE INsTALLER MUsT TAkE INTO AC-
COUNT A sATIsFACTORY AIR MAkE Up RATE IN THE LIkELIHOOD THAT MORE THAN ONE FUEL-
BURNINg FURNACE IN A MULTI FURNACE CONFIgURATION MAY OpERATE AT THE sAME TIME.