Planning guide
How to Use Trade Calculators for Better Field Decisions
This guide shows a repeatable process for turning fast calculator outputs into better field decisions. It is designed for technicians, estimators, and...
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Trade Calculator Guides
Use these guides to choose the right calculator, understand assumptions, and interpret planning results responsibly.
HVAC guide
How HVAC Load and Equipment Sizing Work
HVAC planning works best when capacity, airflow, and duct assumptions are checked together instead of treated as separate guesses.
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Understanding CFM and Duct Airflow
Airflow calculations connect equipment sizing to comfort. This guide explains how CFM targets and duct velocity checks fit together.
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Understanding Pipe Size, Flow, and Pressure
Pipe sizing is a chain of assumptions: demand, length, material, pressure, and fixture performance all matter.
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Drain Slope Explained
Drain slope calculations are simple mathematically, but layout decisions still depend on pipe size, fixtures, and code requirements.
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How Water Heater Sizing Works
Water heater sizing is driven by peak use, not just the number of people in a home or building.
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Understanding Volts, Amps, Watts, and Ohms
Electrical planning often starts with simple relationships, but it is important to know when those relationships stop being enough.
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Basic Wire and Circuit Sizing Concepts
Circuit planning works best when load, breaker, conductor, conduit, and voltage-drop checks are treated as connected decisions.
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