HVACR • College Course Resource
HVACR math, made practical. 70 calculators for airflow, ductwork, refrigeration, heating, hydronics, electrical work and efficiency. Choose an equation, enter your measurements, and calculate.
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Step-by-step solution These steps use your current inputs. Intermediate values are rounded for display; the final answer uses full precision. The ≈ symbol means approximately equal.
Equation & method
Classroom conventions: US customary units unless an input says otherwise. Enter actual measured values in the displayed units. Example inputs are teaching examples, not recommended equipment settings. Use manufacturer data and applicable design methods for equipment selection.
Formula references and assumptions Standard-air factors: 1.08 ≈ 60 × 0.075 × 0.24 for sensible heat; 4.5 ≈ 60 × 0.075 for enthalpy-based heat. The 0.68 latent factor is an approximation using grains of moisture per pound of dry air. The water factor of 500 assumes water, not glycol. Each calculator explains its own limits.
References: Carrier Enterprise system analyzer ; Caleffi hydronic principles ; Greenheck fan performance guide ; Copeland refrigerant glide guide .
Instructor: add to Elementor Open this HTML file in Notepad or another plain-text editor. Copy the entire file into one Elementor HTML widget, update the page and test the published preview. No separate CSS, JavaScript files or libraries are required. Use a full-width container for the two-column layout. Your account must be allowed to save script tags. If code is removed, ask the WordPress administrator to install it using the site’s approved method.
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