Check a straight dryer-exhaust run and elbow ledger against the exact model's written maximum, while keeping transition duct, reserve and local-code uncertainty visible.
Does this exact dryer manual leave enough route allowance?
Use the maximum from the exact model's installation instructions, subtract an explicit planning reserve, then total the measured straight duct and the manual's own fitting deductions. Keep the transition connector separate unless that exact manual says otherwise.
Method
Equivalent length equals straight duct plus each elbow count multiplied by the deduction copied from the exact manual. The verdict compares that total with the manual maximum after reserve; it does not infer Hong Kong approval from a foreign code reference.
Important limitation
The tool cannot identify concealed bends, crushed or dirty duct, termination resistance, local amendments, listing conditions or whether the entered manual applies to the installed model. An installer and the exact written instructions control the final route.
What the result cannot know
The tool cannot identify concealed bends, crushed or dirty duct, termination resistance, local amendments, listing conditions or whether the entered manual applies to the installed model. An installer and the exact written instructions control the final route.
