Posts by Jonathan Mousdell
How to Calculate Static Pressure in an HVAC System
Calculate static pressure at design stage, measure TESP at commissioning and compare the two to diagnose excess resistance.
Read MorePlumbing Fixture Units, Explained: Charts for Every Code
Supply, Drainage, and a Chart for Every Major Code
Read MoreWhat Is Thermal Lag? Understanding Time Lag and Thermal Mass in HVAC Design
Why heat arrives hours after the temperature peaks, and what that means for cooling loads, plant sizing, and comfort.
Read MoreASHRAE 183: The Industry Standard for HVAC Load Calculations
Learn what ASHRAE Standard 183 requires for HVAC load calculations and what engineering design software needs to produce compliant, audit-ready results.
Read MoreHow to Calculate Air Changes Per Hour
Learn the ACH formula, how to calculate air changes per hour from airflow and room volume, and typical values by room type.
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