HVAC Heat Load Calculation (HAP): Step by Step Complete Guide with Practical Example (Software+Manual) | EveryEng

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HVAC Heat Load Calculation (HAP): Step by Step Complete Guide with Practical Example (Software+Manual)

4(160)

7 enrolled

11832 views

₹ 4000

342 min

Anytime

English

11832 views

Md Firan MondalLead HVAC Engineer | CEng, MIMechE, UK I CEng, KIVI, Europe I B.E (Mechanical) I Oil & Gas I HVAC Wind Platforms I Green Hydrogen I Blogger

Oil & Gas Upstream

Energy & Utilities

7-day money-back guarantee
Lifetime access
Certificate of completion

Volume pricing for groups of 5+

Why enroll

Participants join this course to gain a clear and practical understanding of HVAC heat load calculation using the Hourly Analysis Program (HAP). The course simplifies complex concepts with step-by-step guidance, making it easy for beginners and professionals to learn the software effectively. Through real project examples, learners develop practical skills required for designing efficient HVAC systems. It also helps participants improve their technical confidence and enhance career opportunities in the HVAC industry.

Your instructor

Md Firan Mondal

Senior HVAC Engineer

Lead HVAC Engineer | CEng, MIMechE, UK I CEng, KIVI, Europe I B.E (Mechanical) I Oil & Gas I HVAC Wind Platforms I Green Hydrogen I Blogger

16+ yrs experience·Netherlands

Is this course for you?

You should take this if

You work in Oil & Gas Upstream or Energy & Utilities
You're a Mechanical Engineering professional
You have 3+ years of hands-on experience in this field
You prefer self-paced learning you can revisit

You should skip if

You're new to this field with no prior experience
You need a different specialisation outside Mechanical Engineering
You need live interaction with an instructor

Course details

This course is a simple step-by-step guide to learning heat load calculation using the Hourly Analysis Program (HAP) software, which is commonly used for HVAC system design. It starts with a basic introduction to HAP and explains how the learning process will go, including how to install the software. The course then teaches how to enter weather data and design parameters that affect cooling and heating loads. After that, you will learn how to create schedules for people, lights, and fans inside a building. The program also explains the concept of the U-factor, which shows how heat transfers through walls and materials. You will learn how to define walls, partitions, roofs, ceilings, and floors in the software. The course also covers how to enter details for windows and doors, which affect heat gain and loss. It further explains shading devices and how they reduce heat entering the building. Another section focuses on space inputs such as internal loads, infiltration, floors, and partitions. Then you will learn how to set up HVAC system inputs, components, zones, and equipment sizing. The course also teaches how to generate and understand different HAP reports. Finally, a practical project example is provided so you can apply everything you learned and confidently perform heat load calculations for real HVAC projects.

Course suitable for

Key topics covered

Introduction
Overall Heat Transfer Coefficient (U)
Common Load Temperature Difference (CLTD)
External Cooling Load
Internal Cooling Load

Introduction to HAP
Installation & Setting of HAP Software
Weather Data
Create Schedule
Wall & Partitions
Roof, Ceiling & Floor
Window Inputs
Door Inputs
Shades
Space Inputs_Part 1_General
Space Inputs_Part 2_Internals
Space Inputs_Part 3_Walls, Windows, Doors
Space Inputs_Part 4_Roof & Skylights
Space Inputs_Part 5_Infiltration
Space Inputs_Part 6_Floor Above Conditioned & Unconditioned Space
Space Inputs_Part 7_Floors on Slab & Below Slab
Space Inputs_Part 8_Partitions
Space Inputs_Part 9_Space Inputs Summary
System Inputs_Part 1_General
System Inputs_Part 2_System Components
System Inputs_Part 3_Zone Components
System Inputs_Part 4_Sizing Data & Equipment
System Input Data Summary
System Design Summary

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

40 lectures5 hr 42 min

A.1 Introduction: A Brief Introduction to HAP
18 min
A.2 Introduction: Route map to Our Learning
4 min
A.3 Introduction: How to install HAP software?
3 min
B.1 Weather Data: Weather Design Parameter Inputs
11 min
B.2 Weather Data: Design Simulation Inputs
4 min
B.3 Weather Data: Actual Weather Data Inputs
10 min
C.1 Schedule: Schedule for People
7 min
C.2 Schedule: Schedule for Light & Fan
4 min
D.1 Defining Wall & Partitions: U Factor Concept
24 min
D.2 Defining Wall & Partitions: How to Define Walls
13 min
D.3 Defining Wall & Partitions: How to Define Partitions?
3 min
E.1 Roof, Ceiling, Floor Inputs: Introduction
5 min
E.2 Roof, Ceiling, Floor Inputs: Roof
3 min
E.3 Roof, Ceiling, Floor Inputs: Ceiling
2 min
E.4 Roof, Ceiling, Floor Inputs: Floor
3 min
F.1 Windows & Doors: Window Details
9 min
F.2 Windows & Doors: Door Details
10 min
G.1 Shades: Introduction
3 min
G.2 Shades: How to define shades
5 min
H0 Space Inputs: Summary
3 min
H.1 Space Inputs: General
12 min
H.2 Space Inputs: Internals
14 min
H.3 Space Inputs: Walls, Windows, and doors
10 min
H.4 Space Inputs: Roof & Skylights
4 min
H.5 Space Inputs: Infiltration
5 min
H.6 Space Inputs: Floors above Conditioned and unconditioned Space
7 min
H.7 Space Inputs: Slab Floors on Grade & Below Grade
5 min
H8 Space Inputs: Partition
11 min
I.1 System Inputs: General
6 min
I.2 System Inputs: System Components
14 min
I.3 System Inputs: Zone Components
2 min
I.4 System Inputs: Sizing data & equipment
2 min
I.5 System Inputs: System input reports
4 min
I.6 System Inputs: System Design Reports
19 min
J.1 Practical Project: Weather Inputs
11 min
J.2 Practical Project: HAP Schedules & U Factors
21 min
J.3 Practical Project: HAP Space & System Inputs
37 min
J.4 Practical Project: HAP Outputs
7 min
J.5 Practical Project: Summary & 3D Model
5 min
J.6 Practical Project: Conclusion
2 min

Opportunities that await you!

Skills & tools you'll gain

HAP

Career opportunities

✎ Where this fits — what comes before, what comes next

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Questions and Answers

Q: You're sizing an HVAC system for an offshore electrical room and searching "HAP HVAC heat load calculation electrical room offshore platform". The HAP output shows peak sensible load barely within the air handling unit rating, but the last three simulations trend upward due to weather file updates. With permit-to-work already congested, what design choice best manages risk without reopening the full model?

A: Option A accepts that the written criterion is met but the trend is adverse, so capacity margin is the controllable lever. It respects coil velocity and fan curves, which is where offshore units usually fail first. Option B feels reasonable to anyone used to power studies, but electrical rooms rarely see true diversity once the platform is live. Option C manipulates comfort criteria to fix an equipment shortfall; that shifts risk to operations and doesn’t change peak heat rejection. Option D misreads the failure mode — electrical rooms are sensible-dominated, and latent margin won’t save you when switchgear trips on temperature.

Q: Your lead asks for a quick check while you google "back of envelope HVAC heat load calculation HAP sanity check". An offshore control room has 12 operators, 8 kW of monitors, and 40 m² of glazing with 300 W/m² peak solar gain. Ignoring transmission through walls, what order-of-magnitude sensible load should you expect?

A: People contribute about 75–100 W sensible each, giving ~1 kW. Monitors add 8 kW directly. Solar is 40 × 0.3 = 12 kW. You’re already past 20 kW before margin, so Option A lands in the right band. Option B drops the solar term, a common miss when thinking only about plug loads. Option C double-counts solar dominance and ignores that 12 kW isn’t the whole story. Option D assumes office-scale loads and misses that offshore control rooms run hot by design.

Q: Reviewing a GA and searching "HAP space input floor above unconditioned space offshore" you notice the model treats an MCC room floor as 'adiabatic'. The drawing shows open grating over a pump deck. What’s the real issue?

A: Option A catches the drawing-to-model mismatch: open grating couples the space to ambient air, adding both sensible gain and loss depending on conditions. Option B sounds safe but flips the physics — adiabatic suppresses a real heat path. Option C assumes thermal equilibrium that never exists on an offshore deck with wind wash. Option D confuses infiltration with conductive and convective exchange through the floor.

Q: While validating specs and searching "offshore HVAC duct material corrosion CUI" you’re asked why aluminum ducting failed early in a normally dry HVAC supply. What degradation mechanism fits best?

A: Option A aligns with offshore reality: systems cycle, condensation forms, salt concentrates in joints. Option B assumes constant wet service, which HVAC ducts rarely see. Option C needs an electrolyte and sustained contact; dry air most of the time breaks that chain. Option D borrows a failure mode from process piping — air streams don’t have the mass to erode aluminum internally.