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The Fenwal 35-70 series uses proprietary Detect-A-Flame technology for remote flame sensing
As a direct-fit draft inducer assembly
is a Heavy Duty Condenser Style Fan Blade engineered for critical cooling demands in commercial and industrial HVACR systems
a significant deviation indicates it is time for a replacement
Resideo AF11DS-1A Screen Kit 320734-701 The Fenwal 35-70 series usesResideo AF11DS 1A is a 100 micron replacement screen kit designed for use with compatible F76S inline strainers in HVAC and hydronic systems. This filtration screen is used to capture larger sediment, rust particles, and debris from water systems, helping protect downstream components such as pumps, valves, and heat exchangers from contamination and flow restriction. This screen kit is commonly used during routine maintenance or service replacement
