HVAC Heat Load Calculation (HAP): Step by Step Easy Guide

Learn to set weather design parameter inputs for hvac load calculations by selecting Oman, Muscat, and adjusting design temperatures, design solar, and simulation data.

Configure design simulation inputs for hvac load calculations by selecting locations such as Muscat, Oman; set holidays by building type; generate design temperature profiles and weather reports.

Identify Muscat's precise weather data using climatic design conditions, extract latitude, longitude, and elevation, and determine cooling and heating loads with max dry and wet bulb temperatures and psychrometric calculations.

Explain how to create schedules and hourly profiles for heat load calculations, setting inputs for people, lighting, and other loads, and mapping weekdays, holidays, and office hours.

Create schedules for lights and fans with hourly profiles for weekdays and weekends, using 0% to 100% light and 0% fan during unoccupied times, and verify with input reports.

Learn the concept of the overall heat transfer coefficient, or u-factor, and how resistance adds across multi-layer walls to reduce heat ingression, with a step-by-step calculation.

Define external, partition, and internal wall assemblies and their layers to assess heat transfer in hvac load calculations, including materials, thickness, and resistance, and derive the u-value.

Define partition assemblies with gypsum board, air space, and concrete block, choose thickness to estimate heat load, and use Ashrae fundamentals 2021 for u-values when data is missing.

Define roof, ceiling, and floor concepts and explain how insulation, thickness, and conditioned versus unconditioned spaces drive heat flow.

Learn to define a roof in HAP by specifying the roof assembly, surface resistance, concrete and insulation layers, compute the total resistance and the u-value, and save.

Define indoor surface resistance for the ceiling and illustrate downward heat flow in an air conditioned space. Compute total resistance 1.46 and overall u-value 0.683 W/m square k.

apply hvac heat load calculation concepts to define floor heat transfer by analyzing surface resistance, air resistance, and upward heat flow between conditioned and ventilated spaces.

Define and document window details for hvac heat load calculations by naming windows, entering height, width, frame type, glazing, air gap, and viewing input reports.

Define and assess building door heat transfer by detailing door types, dimensions, glazing, and U-values; compute gross and glass areas to prepare a door schedule (D1, D2, etc.).

Explore exterior and interior shades, including overhangs, louvers, blade sets, vertical panels, and fins, to reduce heat ingress and improve energy efficiency in building design.

Discover how to define exterior shade in the project, including rival depth, overhang, left and right fins, projection from the wall, height above the window, and extensions past sides.

Learn to input general space data for a switchgear room in a substation, computing area and effective area, elevations, and outdoor ventilation for accurate hvac loads.

Explain sizing internal loads for hvac heat calculations, covering overhead lighting types, lighting power density, ballast factors, electrical equipment heat, occupancy schedules, and ashrae ventilation inputs.

Explore how to input external walls, determine true north orientation, and calculate wall gross area including doors and windows for hvac heat load calculation.

Learn to input roof and skylight data for hvac heat load calculations, including roof exposure, gross area, slope, skylight quantity, and skylight dimensions with u value and seed coefficient.

Explore infiltration in spaces and how design heating, design cooling, and energy analysis use liter per second, liter per second per square meter, and air changes per hour.

Explain slab floor on grade vs below grade, how heat can enter through edges, and how to calculate floor area, exposed perimeter, insulation depth and R value for heat load.

The lecture explains how to input partition walls in HVAC heat load calculations, distinguishes partition walls from internal walls, and calculates partition areas and temperature-driven heat transfer between spaces.

Analyze space input data reports for the MP switchgear room, detailing floor area, ceiling height, outdoor requirements, and internal loads; capture walls, windows, doors, exposure, and skylights for energy analysis.

Explore Hap system inputs in the software, selecting from package rooftop units, packaged terminal units, split air handling units, and chilled water units, configurations like single zone and dual duct.

Learn Harp system components and inputs for HVAC load calculations. Choose from rooftop, split, chilled water, or terminal units and set ventilation, outdoor air, humidity, and supply temperature.

In hvac heat load calculation, configure zone components, including space thermostats and thermostat sets, for a single zone. Set cooling start set points, unoccupied temperatures, throttling range, and thermostat schedules.

Explore sizing data and system sizing practices, including 10% safety factors (adjustable to 15% per project), computer-generated outputs, and equipment data, to create system one for HVAC heat load calculations.

Review system input data for system one, including equipment and air system type, ASHRAE 62.1 ventilation, humidification, damper leakage, and thermostat and fan details.

Summarizes system one design for hvac heat load calculation, detailing zone and space loads, ventilation, and coil sizing to reach a 32 kilowatt (9.1 tonnage) cooling load.

Identify location-specific atmospheric conditions and indoor design criteria from project design basis and drawings to perform heat load calculation for a substation building, using architectural and structural drawings for data.

Configure input parameters for HAP calculation, including general and project settings, weather data, and design conditions. Select Oman Muscat weather and Ashrae 2021 data to support accurate heat load analysis.

Learn to create schedules for people, lights, equipment, and fans in a practical hap project, then compute wall, roof, floor, window and door u-factors using u-values and film resistances.

Learn to build step‑by‑step hap inputs for a multi‑space building, including precise space inputs, walls, roofs, floors, infiltration, internal loads, and rooftop unit single‑zone system modeling.

Demonstrates generating HAP outputs via view input and design reports, capturing space data, weather profiles, and room loads to finalize air system sizing, coils, and ventilation.

Calculate the heat load to select four rooftop packaged air conditioners, three active and one standby, with units around 14 tons each and a 41.7 tonnage total coil load.