Bs — 5410-3

He underlined the word sustainable . And he smiled.

Arthur sighed. “Mrs. Hillingdon, I don’t make oil boilers anymore. The new regulations are a nightmare. You need a hybrid system, and the only standard that covers that is…” bs 5410-3

He pulled a worn, coffee-stained document from his desk. It was the one he’d laughed at when it arrived. . Installations for stand-alone and hybrid bioliquid and liquid biofuel appliances. He underlined the word sustainable

Arthur tightened the last flue connection. The flue liner was special—stainless steel, grade 316L, resistant to the acidic condensate of bio-liquids. He’d ignored that once, on a test rig. The flue had corroded through in a month. “Mrs

Arthur Pendelton closed his workshop for good. But above his workbench, he hung the brass nameplate, and next to it, a framed copy of BS 5410-3.