Useful answers.
Understand the working.
Calculators and worksheets for the subjects you study and the problems you meet in practice. Work through an example, try your own values, then test the same ideas in exam practice.
Exhaust system inspection record
Follow the system from hood and filters through ducts, access panels, fan and discharge. Keep inaccessible sections visible in a report rather than assuming an unobserved component is clean.
Open tool →FREE TOOLDuct cleaning surface area calculator
Build a straight-segment internal cleaning-area takeoff from actual dimensions. Subtract documented openings without treating area as a complete labour or access estimate.
Open tool →FREE TOOLAirflow traverse calculator
Convert equal-area velocity samples into a mean velocity and duct flow. Check the measurement pattern before treating an arithmetic mean as representative.
Open tool →FREE TOOLGrease measurement log
Compare deposit measurements taken at the same location using the same documented method. A trend record does not automatically establish a cleaning threshold.
Open tool →FREE TOOLExhaust service schedule builder
Preserve the programme source behind each exhaust-system service interval. Produce usable dates without inventing a universal mandatory cleaning frequency.
Open tool →Tools that connect the calculation to the concept
Each tool shows its method, units and assumptions, together with two worked examples. Example values are for learning; replace them with your own measurements or documented inputs. The related study links take you to the matching certification topic on Kitchen Exhaust Exam.
Worksheets run in your browser. We do not send entered measurements or report text to a calculation service. Where export is available, you choose when to save the file locally.
Check the boundary of the answer
A useful result starts with the right inputs and an appropriate method. These tools explain what is calculated and what the method leaves out. User-supplied criteria remain identified as supplied criteria; a calculation does not automatically approve equipment, certify an inspection or establish regulatory compliance.