EXPECTED USEFUL LIFE TABLE - Wa
Exchanger in boiler 15 15 External tankless 15 15 Instantaneous 10 10 DHW Storage Tanks Small (up to 150gals) 12 12 Replace Large (over 150gals) 7 7 Point Tank Lining Domestic Cold Water Pumps 15 15 Fire Supression 50+ 50+ Flue Exhaust w/boiler w/boiler Free Standing Chimney 50+ 50+ Fuel Oil Storage 25 25 Fuel Transfer System 25 25 Heat
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