Role

HVAC Engineer

Designs heating, ventilation, and cooling systems for buildings to meet comfort, energy, and safety needs.

12 chaptersAbout 3 months15–30 min a day11 skills2 projects
Start this path free →

Chapter 1 is free. No card needed.

Day 1 on the HVAC Engineer path.

What a HVAC Engineer does

Designs and improves building heating and cooling systems so people stay comfortable while energy use and safety risks stay low.

  • Design HVAC layouts, equipment selections, and control sequences for new or renovated buildings
  • Calculate heating and cooling loads and size ducts, pipes, fans, pumps, and diffusers
  • Create drawings, specifications, and schedules for construction and procurement
  • Coordinate with architects, electrical, plumbing, and structural teams to avoid clashes
  • Review contractor submittals, shop drawings, and site installation for compliance
  • Test and troubleshoot system performance during commissioning and handover
  • Improve energy efficiency using better controls, ventilation strategies, and heat recovery
  • Document decisions and support permits, inspections, and safety requirements

A day in the life

  1. Review project goals, codes, and floor plans, then plan the design tasks for the day
  2. Run load calculations and update drawings and equipment schedules in CAD or BIM tools
  3. Meet with the project team to resolve clashes, costs, and constructability questions
  4. Answer contractor questions and review submittals or site photos for installation issues
  5. Write notes, update reports, and track open items before the next design review

Tools you will use

CAD and BIM: AutoCAD, RevitLoad calculations: HAP, TRACE 3D PlusSpreadsheets: Excel, Google SheetsEnergy modeling: EnergyPlus, eQUESTField testing: airflow hood, manometerDocumentation: PDF markup tools, issue trackers

Your plan

Chapter by chapter.

1~1 wk

See what HVAC engineer work involves

StartFree
2~1 wk

Design and Modelling

Skills
31–2 wks

Make reverse-engineer a household object: model, drawing, tolerances

Proof
4~1 wk

Meet people who do HVAC engineer work

People
5~1 wk

Analysis and Calculations

Skills
6~1 wk

Design for Build

Skills
7~1 wk

Technical Communication

Skills
8~1 wk

Working with People

Skills
91–2 wks

Make HVAC load calc and duct layout for a small space you know

Proof
10~1 wk

Practise role interviews

Interview
11~1 wk

Choose a route into HVAC engineer work

Decide
12on your timeline

Apply for roles

Apply

By the last chapter

This is what you can show.

Things you've made

Reverse-engineer a household object: model, drawing, tolerances and HVAC load calc and duct layout for a small space you know

Skills you can prove

11 skills, each rated on work you actually did.

People you've talked to

3 people who do the job, with a message ready for each.

Questions you can answer

19 interview questions and a mock interview, with feedback.

Credentials

8 credentials compared, so you can pick one, or decide you don't need one. None is required.

Ways in

There is more than one route.

Ways to study

  • Bachelor degree in mechanical engineering or building services engineering
  • Diploma or higher diploma in HVAC or building systems with strong math and physics
  • Graduate certificate or masters focused on building energy and HVAC design
  • Work-based training plus short courses in HVAC design, controls, and building codes

How people get their first job

  • Apply for HVAC design internships at engineering consultancies or contractors
  • Start as a mechanical engineering trainee supporting drawings and calculations
  • Work in commissioning or building operations to learn real system behavior
  • Earn an HVAC or energy modeling certificate and build a small portfolio
  • Volunteer on campus or community building audits to practice measurement and reporting

Life skills on this path: Networking · Job interviews · Job search

How the work is changing

What AI is doing to this role

How AI is changing this role · one of 6 tasks we track

Run energy models for buildings

Sped up a lot

What AI does

EnergyPlus and eQUEST now chew through scenario runs overnight.

Still yours

You pick the inputs and say which result to trust.

Reviewed September 2026

In the app · Premium

The rest is in the app

  • How AI affects the other 5 tasks
  • Whether this job is growing or shrinking
  • How hard the first job is to get
  • Similar roles that are easier to get into
  • Updated every month, with sources
See it in the app →

How we rate a job →

Already working

Already a HVAC Engineer?

Plan your move to Senior HVAC Engineer: 9 chapters that end with a strong case for your next review.

Grow in the role →

Other roles in Mechanical & Design Engineering

Automotive EngineerBattery Thermal Management EngineerDesign for Manufacturing EngineerFixture Design EngineerFluid Dynamics EngineerGenerative Design SpecialistHuman Factors EngineerMechanical Design EngineerMechanical EngineerPackaging EngineerProduct Development EngineerThermal EngineerTool Design EngineerTooling Engineer

Questions

Questions about this path

How long does it take to become a hvac engineer with Welica?

The path is 12 chapters, 3 months at 15 to 30 minutes a day. You can go faster or slower; the plan moves with you.

Do I need a degree?

Not always. Common routes are bachelor degree in mechanical engineering or building services engineering, diploma or higher diploma in HVAC or building systems with strong math and physics, graduate certificate or masters focused on building energy and HVAC design, or work-based training plus short courses in HVAC design, controls, and building codes.

What is free?

Chapter 1, See what HVAC engineer work involves, is free for good. Premium unlocks the rest of the path.

Start the HVAC Engineer path.

Chapter 1 free. About 15 to 30 minutes a day.

Start this path free →

Already have an account? Sign in

Also on iPhone and Android