A Lochinvar 100288414 Orifice meters natural gas flow to the burner section for controlled combustion and steady output in the heating assembly.
The orifice meters natural gas flow to the main burner so the HVAC system can maintain proper combustion and stable heat output. Its precise .472" opening, 2.25" length and brass construction matter because they support accurate fuel delivery, durability and resistance to wear in heating and cooling equipment.
The orifice may need to be replaced if the heating and cooling unit shows uneven burner flames, poor ignition, reduced heating performance or inefficient combustion. Common indicators include clogging, corrosion, visible damage to the brass body or debris buildup and you might notice these issues after prolonged exposure to contaminants or harsh operating conditions.
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Absolutely! Customers are able to return most new, unopened real OEM heating and cooling replacement parts within 90 days of delivery, so check our Returns page to see if your purchase qualifies. Return eligibility may differ for custom orders.