Using The Duct Cleaning Template - Elcometer 456 Operating Instructions Manual

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4 USING THE DUCT CLEANING TEMPLATE

Take readings (see page 5) in accordance with the appropriate HVCA
Use the Duct Cleaning Template supplied and the procedure described below to help you take a group of
20 readings before and after cleaning in the test location. Then output your readings to ElcoMaster™.
1. Place the Duct Cleaning Template
in the duct.
2. Mark the position of each corner.
3. Use your gauge to take a reading in
each of the holes in the template
and save all these readings in a
batch.
4. Remove the template and clean
the surface of the duct within the
boundaries of the corner marks.
a. Heating and Ventilating Contractors' Association, Guide to Good Practice TR/19, Cleanliness of Ventilation Systems
(www.hvca.org.uk).
6
(1)
(3)
a
method of measurement.
(2)
(4)