October 11, 2026
Sizing a fire pump starts with one number: the net pressure it must add at the rated flow. This free...
Free tools built for day-to-day MEP work, including AutoCAD LISP routines, HVAC calculators, and software guidance to speed up design and takeoff tasks.
Sizing a fire pump starts with one number: the net pressure it must add at the rated flow. This free...
Free AutoCAD LISP that counts every block in a selection, groups them by name or layer, handles dynamic blocks and...
Need to calculate the total length of multiple lines or polylines in AutoCAD? The BuildMEP Total Length AutoCAD LISP instantly...
You are probably one of three users who would have searched for “HAP 6.2 free download”: you have a project...
The same is true for all the ‘essential tools for homeowners’ lists—what to purchase, but not what to do with...
Duct sizing is one of those calculations everyone in HVAC ends up doing constantly, and it’s deceptively easy to get...
BuildMEP practical HVAC estimating tool This free duct sheet takeoff Excel workbook totals the external surface area of straight rectangular...
Engineering tools, HVAC guides, calculators, and practical MEP resources.
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