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The Williams 9A336 is a high altitude conversion kit for the Williams 5009821 and 5009621A furnace. The kit includes all adapters and orifices needed for high altitude conversion.
Product Includes
Orifice for installation at 2,000 to 4,000 feet.
Orifice for installation at 4,000 to 6,000 feet.
Orifice for installation at 6,000 to 8,000 feet.
1-Year Limited Parts Warranty
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