https://www.homeequipmentage.com/how-old-is-my-packaged-rooftop-unit/
How Old Is My Packaged Rooftop Unit? | Free RTU Age Calculator | HomeEquipmentAge
Decode your packaged rooftop unit serial number instantly and estimate manufacture date and equipment age. Free, no signup required.
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https://rtu-ac.com/en/105-ton-york-ypal-single-packaged-rooftop-unit/e/(4)-7.5-Ton-Lennox-Package-RTU-AC-Units-208/230v-3Ph-High-Efficiency-p757540401
105 Ton YORK YPAL Single Packaged Rooftop Unit
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