Tool Calculator

At zero resistance in perfect conditions, fans are rated for how much air they can move. In the real world there is resistance, resistance from … Read more

Air flows from the grille, across the coil, through a filter, then along a ductwork run to a fan. Every one of those items decreases … Read more

To get the airflow you expect, you must calculate the systems resistance, measured in inches of water gauge. Failure to do so result in a … Read more

Before you resize or balance your HVAC branch, try this calculator: Use a flex-duct static-pressure calculator. It will help you compare accessory losses, compression, bend … Read more

Static pressure = resistance air meets in moving from a tool through ductwork to a filter. The more resistance (static), the less airflow. Resistance is … Read more

Tongue-and-groove boards create interlocking edges and shadow lines that dont exist with drywall. Before you get started, figure out how much material is needed. Boards … Read more

The boards draw your eye toward the ceiling. They look better and also improve sound quality. In an old house, they cover up uneven joists. … Read more

The tension on bandsaw blades should not be too tight or too loose. Too loose and the blade will drift, wasting material; too tight and … Read more

The beauty of the five-cut method is it takes those small angles and magnifies them into something you can actualy measure. Starting with a square … Read more

This cylinder retraction force calculator computes theoretical force, efficiency losses, angle correction, annular pull area, safe load capacity and operational margin. When you pressurize the … Read more

Land is purchased by acres, but people buy fences by linear feet. The longer the length of your fence line, the more it costs, whether … Read more

The feed rates, speeds, taps, etc. Is all specific for each thread; they are not things you can fudge. If you need to tap threads … Read more

With the raised panel door calculator you input the size of your cabinet opening and it spits out the cut list for panel blanks, rails, … Read more

Using inputs like duct size, elbow count, hood type, velocity, makeup air, hood airflow, and roof cap loss, the kitchen hood static pressure calculator determines … Read more