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97406 Controls For Oil Fired Heating
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71-97406 Controls for Oil-Fired Heating - Honeywell
customer.honeywell.comCONTROLS FOR OIL-FIRED HEATING 71-97406Š3 4 FUEL OIL AND OIL BURNING EQUIPMENT Fuel Oil Characteristics Fuel oil is graded based on its physical characteristics. Grades 1 and 2, the lighter grades, are most frequently used for residential applications. Grades 4, 5 and 6 are heavier and are normally used in commercial and industrial burners.