Central Heating Engineer in Birmingham

When a full central heating installation is planned, the boiler choice follows from the system, not the other way round. We start with the house and how it is used, then decide which type of heat source suits it.

• Combi: heating plus instant hot water, no cylinder. Suits smaller homes with one bathroom.
• System boiler: sealed heating with a hot water cylinder, for homes with higher hot water demand.
• Regular (heat only): open vented system with loft tanks, sometimes kept where the existing pipework is designed around gravity feeds.

The size of the boiler should come from the heat loss figures for the rooms, not simply from whatever was there before. An oversized boiler cycles on and off, which wears it and wastes gas. The detail of boiler selection and fitting is covered on our boiler installation page; here, the point is that it is designed as part of the whole system.

A new central heating installation usually happens for one of three reasons: the house has never had wet central heating (some flats and older properties rely on storage heaters or gas fires), the existing system is so old that patching it no longer makes sense, or the layout of the house has changed with an extension or loft conversion.

Design

We measure each room, note wall construction, glazing and insulation, and work out the heat each room needs. That sets radiator sizes and pipe sizes, and where each radiator goes, usually under windows or on the coldest wall.

Installation

Pipework runs under floorboards where possible, with notches and drilling kept within safe zones for joists. Radiators are fitted with thermostatic valves, the system is filled, flushed, dosed with inhibitor and balanced so each room heats evenly. Controls go in last and are set up with you.

Central heating repairs are often system faults rather than boiler faults. The boiler fires, but the heat does not arrive where it should. Common problems we trace include:

• A seized or failing circulating pump, so the boiler overheats and locks out.
• A stuck motorised zone valve, leaving heating or hot water on or off regardless of the programmer.
• Sludge and magnetite blocking radiators and narrow microbore pipes.
• An unbalanced system, where radiators nearest the boiler run hot and the far ones stay cool.
• Faulty room thermostats, wiring centres or wireless receivers.

We test the system from the boiler outwards: flow and return temperatures, pump operation, valve positions and control signals. That tells us whether the fault sits in the boiler or in the circuit around it, and saves replacing parts that were working fine.

Once a system is installed, the heating circuit needs its own care alongside the boiler. The boiler should have an annual boiler service, but the water in the pipes matters just as much.

• Inhibitor: a chemical dose that slows internal corrosion of steel radiators. It is depleted over time and should be tested and topped up.
• Magnetic filter: fitted on the return near the boiler, it catches iron oxide before it reaches the heat exchanger. It needs emptying periodically.
• System pressure: on sealed systems, the gauge should stay steady. Frequent topping up points to a leak or a failing expansion vessel.
• Bleeding and balancing: air build up and poorly set lockshield valves cause uneven heat.

Small checks like these keep a new system running as it was designed and stop sludge building up in the first place.

Losing heating in cold weather is urgent, especially with young children or older relatives in the house, and urgent jobs are prioritised. Before anyone arrives, a few checks sometimes get the heating going again, or at least tell us more:

• Check the boiler pressure gauge. If it has dropped on a sealed system, repressurise using the filling loop following the boiler instructions.
• Check the programmer and room thermostat are calling for heat, and that batteries in wireless stats are not flat.
• In freezing weather on a condensing boiler, a frozen condensate pipe is a common cause of lockout. Pouring warm (not boiling) water over the outside section can thaw it.
• If radiators are leaking, isolate them by closing both valves.

If you smell gas, do not try any of this. Leave the property, and call the national gas emergency number.

In the UK, any work on gas appliances or gas pipework must by law be carried out by a Gas Safe registered engineer. That includes connecting a boiler, altering the gas supply to it and commissioning it. You can ask to see an engineer's Gas Safe ID card, check which categories of work it covers, and look them up on the Gas Safe Register.

Much of a central heating system is water pipework, radiators and electrical controls, which are not gas work in themselves. But where a job touches the boiler or gas supply, the law is clear. There are other rules too:

• A new or replacement boiler must be notified to building control, and you should receive a certificate confirming it.
• Building Regulations set requirements for heating controls, such as a programmer, room thermostat and TRVs, when a system is installed or a boiler replaced.
• Electrical work on controls must meet the wiring regulations.

Birmingham's housing is a patchwork, and each type brings its own heating challenges.

• Victorian terraces and back-to-backs: solid walls, high ceilings and suspended timber floors. Radiators need to be sized generously, and pipework usually runs under floorboards.
• 1930s semis: often on older open vented systems with a loft tank and a cylinder. Many are converted to sealed systems during upgrades.
• 1950s and 1960s housing: frequently has microbore pipework, which is prone to sludge blockages and may need partly replacing.
• Larger homes in Edgbaston and Sutton Coldfield: benefit from zoning, so upstairs and downstairs, or an extension, can be controlled separately.
• City centre apartments: may be on communal systems where individual work is limited to the flat's own circuit.

We plan the system around the building you actually have.