Measuring for Installed Mechanical Insulation: The Denis Formula

Scoping an industrial insulation job requires that you accurately measure the quantities of insulation required for a given mechanical system. In fact accurate measurements are a necessity for both tendering and evaluating bids and finalizing accounts.

James S. Denis, President of MHG International Inc. based in Calgary, Alberta, first introduced a proposed “Standard Method of Measurement” in May 1980 to a World Insulation and Acoustic Congress. It caught on, and ultimately the ‘Denis Formula’ gained approval and acceptance as ‘fair’ to both client and contractor. It is now widely used on industrial projects.

The Thermal Insulation Association of Canada has codified these rules for both metric and “imperial” measurement standards. Use of these standard methods of measurement (the Denis Formula) has eliminated most of the guesswork in sizing up a given project.