HVAC Design | Heat Load Calculation | Duct Design| E20 | HAP

Explore variable refrigerant flow systems, space terminal devices, and heat pumps for simultaneous heating and cooling, with piping, decoupled pumping, plate heat exchangers, and cooling towers guided by manufacturer recommendations.

Examine a water source heat pump system with cooling tower, plate heat exchanger, boiler, expansion tank, and zoned heat pumps, detailing summer cooling, winter heating, and heat recovery.

Learn how hvac performance units like cop, eer, seer, ir, and ipl rate heat pumps and air conditioners, and read manufacturer data sheets to support LEED certification.

Discover hvac equipment selection, including heat recovery and fresh air handling units, doas, fcus, vrv systems, and water-cooled chillers, with a focus on airflow, coil data, temperatures, and energy efficiency.

Explore psychrometric properties of air using the psychrometric chart and calculator tools to determine dry bulb temperature, humidity ratio, dew point, enthalpy, and related properties for heat load calculations.

Learn to read AutoCAD drawings for mechanical quantity estimation by decoding the title block, scale, millimeter units, revisions, legends, and general notes.

Master basic drafting techniques using stretch, rotate, mirror, scale, trim, chamfer, and fill tools; apply ortho mode, create arrays, and explode groups for precise HVAC drafting.

AutoCAD basics cover drawing lines, circles, and rectangles; applying path and spine commands; creating path and polar arrays; and using annotation, dimensions, blocks, layers, and measurement tools for hvac drawings.

Learn the steps of heating and cooling load calculation, including heat loss for walls, windows, roofs, and floors, and size equipment using Excel and HAP software.

Learn to calculate cooling load from heat gain, including envelope and internal loads, using CLTD with design day values and ASHRAE tables.

Explore calculating internal heat gain from occupants, equipment, and lighting using Ashrae 62.1, determine occupancy density, and apply ventilation rates and outdoor air requirements for cooling load design.

Explore the CLTD/CLF cooling load method, detailing sensible and latent heat sources, time lag, and corrected CLTD, with walls, roofs, glass, and internal load calculations.

Learn to perform a heat load calculation for a room using Q = U A ΔT (CLTD corrected) for exterior and internal walls, guided by wall directions and coordinates.

Learn how to calculate wall heat gain for HVAC design, including exterior and interior wall dimensions, U and R values, CLTD corrections, and delta T using ASHRAE data.

Calculate sensible and latent heat loads from occupants using area, number of people, and cooling load factor, referencing tables for per‑person values and the Q bypass and QL per person.

Calculate ventilation and infiltration loads, including sensible and latent components, using delta T, CFM, and humidity differences, then compile total room loads for equipment selection.