Hvac

HVAC stands for heating, ventilation and air conditioning - the systems that keep buildings warm, cool, and supplied with fresh air. A graduate working in HVAC designs, models, installs, commissions or maintains these systems in offices, hospitals, schools, data centres, factories and homes, usually as part of a building services engineering team. Depending on the employer you'll either be a designer sitting with drawings and calculation software for a consultancy, or on the delivery side for a contractor or manufacturer, making sure kit is specified, installed and working properly on real sites.

Approximate graduate salary

Graduate starting salaries in UK building services and HVAC are typically somewhere around GBP 26,000-34,000, but this varies widely - London and the South East sit at the higher end, regional consultancies and smaller firms lower, and contractors or manufacturer roles with site allowances, overtime or a car allowance can differ again. Treat these as rough approximations rather than fixed figures.

What you'd actually do

Sizing equipment and pipework - working out how much heating or cooling a space needs (a 'heat load' or 'cooling load' calculation), then selecting boilers, heat pumps, chillers, air handling units, ducts and pipes to match
Producing and marking up drawings and 3D models, usually in CAD or BIM software (Building Information Modelling - a shared 3D model of the whole building that architects, structural engineers and services engineers all work in), and checking your ductwork doesn't clash with someone else's steel beam
Running energy and airflow simulations to check a design meets Building Regulations Part L and Part F, and increasingly to show how a building will perform against low-carbon or net-zero targets
Going on site visits - surveying an existing plant room, witnessing commissioning (testing and balancing a system so each room actually gets the airflow or temperature the design promised), or picking up snags during handover
Writing up specifications, technical schedules and short reports, and answering queries from contractors, suppliers and the client's project manager by email and on calls
Sitting in design team or coordination meetings with architects, electrical engineers and structural engineers, arguing over where the plant room goes and how much ceiling void you get
Comparing manufacturers' product data to pick equipment that hits the performance, noise, space and budget constraints

How graduates get in

Graduate schemes at building services consultancies and multidisciplinary engineering consultancies - the most common structured route, usually recruited in autumn for a September start, with a formal path towards chartership
Direct entry with a contractor (mechanical and electrical contractors, or specialist HVAC installers) as a graduate/assistant engineer, often advertised year-round rather than in a fixed recruitment cycle - very common and often overlooked by graduates who only look at consultancies
Manufacturer and supplier graduate roles - technical sales, applications engineering or product engineering for firms making heat pumps, chillers, AHUs or controls; a genuinely large part of the market
Degree apprenticeships and part-time study while working - a well-established route in building services, where an employer sponsors you through a BEng while you work; less relevant if you already have a degree, but some employers will fund a part-time MSc top-up instead
Facilities management and estates teams (NHS trusts, universities, large landlords) hiring graduates into building engineering roles focused on operating and maintaining existing systems rather than designing new ones
Sideways entry from a related degree - physics, maths, general engineering or architecture graduates moving in via a building services or energy MSc, or occasionally being hired straight in by employers short of mechanical graduates

What employers ask for

A degree in mechanical engineering or building services engineering is the standard ask. Related degrees - energy engineering, general/integrated engineering, architectural engineering, sometimes physics - are often accepted, particularly by contractors and manufacturers. Non-engineering degrees are a hard sell without a conversion MSc.
Whether the degree needs to be accredited matters if you want chartership: accredited BEng or MEng courses (accredited by IMechE or CIBSE) make the route to Chartered Engineer straightforward. With a non-accredited or non-engineering degree you can still get there, but usually via a 'technical report route' or a further qualification, which takes more effort.
A 2:1 is the usual threshold on structured graduate schemes; plenty of contractors, manufacturers and smaller consultancies will take a 2:2 with relevant experience or genuine interest, so don't self-select out.
Some form of practical exposure helps a lot - a placement year, summer work with a contractor, or even site labouring. Employers care that you've seen a real plant room, not just a textbook.
Software familiarity is a bonus rather than a requirement at entry: AutoCAD, Revit, and load/energy tools like IES VE or Hevacomp. Most employers train you, but naming one you've touched gives you something to talk about.
A driving licence is genuinely useful and sometimes required, especially in contracting, maintenance and manufacturer roles that involve regular site travel.

Skills that matter

Applied thermodynamics and fluid mechanics

Almost everything you calculate - heat loads, air volumes, pressure drops, pump and fan selection - comes back to these two, and you need to be comfortable using them without a textbook open.

Spatial and coordination sense

A design only works if the ducts, pipes and cable trays physically fit in the ceiling void alongside everyone else's services, so you spend a lot of time thinking in three dimensions and negotiating space.

Reading and applying standards and regulations

Building Regulations, CIBSE guides and fire and ventilation standards set hard constraints on what you can design, and knowing where to look things up quickly is a large part of being useful.

Spreadsheet and calculation discipline

Much of the real work happens in structured calculation sheets and schedules that other people check and rely on, so clear, traceable, checkable working matters more than clever shortcuts.

Explaining technical decisions to non-engineers

You regularly have to tell an architect why the plant room can't shrink or a client why their preferred option costs more to run, in language they'll accept.

Commercial awareness of capital versus running cost

HVAC design is constantly a trade-off between what a system costs to install, what it costs to run, and how much carbon it emits, and you're expected to have a view.

Where it leads

Graduate/assistant engineer, typically for the first couple of years - working under a senior engineer's supervision, doing calculations, drawings and site visits, and logging evidence towards professional registration.
Engineer, then senior engineer - you take ownership of packages or whole small projects, sign off your own work, and start supervising graduates. Timescales vary a lot; some people reach senior in around five years, others take longer depending on project mix and employer.
Chartered Engineer (CEng) via CIBSE, IMechE or another licensed institution, or Incorporated Engineer (IEng) as an equally valid route. Employers often expect you to be working towards it from day one, and reaching it is the main formal milestone in the first phase of your career. There's no fixed timetable - a common pattern is roughly four or more years post-graduation, but it depends on your degree, the evidence you gather and when you choose to apply.
From senior engineer the paths fork: technical specialist (deep expertise in, say, heat pumps, data centre cooling, healthcare ventilation or building physics), project or design management, or associate/director in a consultancy running teams and winning work.
Longer term, common destinations include contracts and operations management on the contracting side, technical or product management with manufacturers, energy and net-zero consultancy, client-side roles in estates and development, or independent consultancy and expert work.

What people get wrong

“It's mostly about air conditioning - installing and fixing units.”

Installation and repair is one part of a much wider industry. A large share of graduate HVAC work is desk-based design and modelling for buildings that don't exist yet, and the fastest-growing area is low-carbon heating - heat pumps, heat networks and ventilation strategies - rather than cooling.

“It's an old-fashioned, low-tech corner of engineering.”

Building heating and cooling is one of the biggest sources of UK carbon emissions, so HVAC sits right at the centre of decarbonisation policy and retrofit work. Day-to-day it involves 3D modelling, energy simulation, controls and increasingly building performance data.

“You need a building services degree to get in.”

Most people in the field came in through mechanical engineering, and employers routinely hire from general engineering, energy and physics backgrounds too. The building-services-specific knowledge - regulations, CIBSE guidance, how a real project runs - is largely learnt on the job, and employers expect to teach it.

“Consultancy and contracting are basically the same job.”

They're quite different careers. Consultancy is design-led, office-heavy, slower-paced per decision and geared towards chartership; contracting is delivery-led, site-heavy, faster-moving, more commercially driven and often better paid earlier on. Moving between them is possible but the skills you build differ.

Where this varies

The role varies a lot depending on who employs you. At a design consultancy you're mostly at a desk producing calculations, models and specifications, with occasional site visits, and there's usually a formal chartership training scheme. At a mechanical and electrical contractor you're closer to the build - reviewing installations, managing subcontractors, sorting out problems on site - and progression tends to be tied to project delivery and commercial performance rather than a training programme. At a manufacturer you'll be doing applications engineering or technical sales, helping designers pick and size the company's products. In facilities management or an NHS estates team, the work is about operating, maintaining and upgrading systems already in place. Sector matters too: healthcare, pharmaceutical and data centre work is far more tightly specified and regulated than commercial offices or housing. Geographically, London and the big city regions have the deepest concentration of consultancies, while contracting and manufacturing roles are spread more evenly across the UK.

General guidance about the role across the UK market, not about any specific employer. Entry routes and requirements vary — always check the individual job advert.