Welcome to Trimill Industrial Systems Inc.

TriLookup, our popular shareware Add-in for Excel is now available for free of charge.

We are currently working on two new software packages:

TriHumidAir Microsoft® Excel add-in for psychrometrics calculations in HVAC engineering and other applications in which properties of humid air need to be calculated.
TriTrend Microsoft® Excel add-in for interactive trend display and analysis.