Product Description Detailed Specs Downloads Reviews/Questions Product Description SCAN HEATER 36V 48V WORKS WITH Detailed Specs null null null null null null null null null null MFG Part Number 521L3648S3 Product Type Accessory Downloads Warranties Warranties Reviews/Questions The Honeywell 521L3648S3 is also known as HON -521L3648S3 or 521L3648S3