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The Williams 9A334 is a high altitude conversion kit for the Williams 2509821 and 2509621A 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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