Requirements · Appliances
Installation requirements for ovens, hobs, dishwashers and fridges
Last updated 25 October 2026 · 2 sources listed · Reading time about 3 minutes
Short answer
Each appliance has its own supply needs: ovens and induction hobs can need a dedicated circuit, gas hobs need a certified connection and adequate ventilation, dishwashers need water inlet and waste routing, and fridges need airflow. Regulated work such as gas and fixed electrical connections should be done by registered installers, and local rules vary, so confirm with your national regulator.
Who this is for: A homeowner fitting a kitchen who needs to know what electrical, gas, water and ventilation provision each appliance needs before delivery day.
What to evaluate
Electrical supply capacity
High-power appliances can overload an unsuitable circuit, causing nuisance trips or overheating cables.
How to check: Give the electrician each appliance's rated power and ask them to confirm circuit, cable size and protective devices.
Gas connection and safety
Gas appliances require gas-tight connections, correct burner setting, and ventilation to prevent carbon monoxide and gas leaks.
How to check: Use an installer registered with the relevant national gas register and ask for a safety record on completion.
Ventilation and extraction
Cooking produces moisture and combustion gases. A hood and background ventilation protect indoor air quality and surfaces.
How to check: Check extraction rules and the hood's airflow and ducting against the hob type and room.
Water supply and waste
Dishwashers and washing machines need accessible inlets, isolating valves and proper waste connections. Poor connections leak slowly behind units.
How to check: Ask the plumber to fit accessible isolation valves and a trap or standpipe as required.
Clearances and airflow
Refrigerators and ovens need space for heat to disperse. Cramped fitting shortens life and raises energy use.
How to check: Read the installation sheet for gaps, vent openings and door swing.
Cabinet and cut-out dimensions
Built-in appliances are designed for specific niches. A few millimetres out can prevent fitting.
How to check: Compare the manufacturer's drawing with the cabinet plan before ordering.
Anti-tip and securing
Freestanding cookers can tip when a heavy door is loaded, and stability devices prevent accidents.
How to check: Fit the supplied bracket or chain and check it is secured to a solid fixing.
Comparison
| Appliance | Typical supply need | Who usually installs |
|---|---|---|
| Electric oven or induction hob | Dedicated circuit rated for the appliance | Registered electrician for the fixed connection |
| Gas hob or cooker | Gas-tight flexible or rigid connection and ventilation | Registered gas installer |
| Dishwasher | Cold or hot feed with valve, waste connection and a socket | Plumber or competent fitter, electrician for socket |
| Integrated fridge or freezer | Socket access and ventilation gaps | Fitter following manufacturer's instructions |
| Extractor hood | Electrical supply and duct to outside or recirculation filters | Electrician and fitter |
Decision worksheet
Rate up to three options against this guide’s own criteria. It runs in your browser and saves only on this device. It is a thinking aid, not a recommendation.
1. Have you checked each criterion?
0 of 7 criteria checked.
2. Compare options (0 = fails or unknown, 3 = meets it well)
| Criterion | |||
|---|---|---|---|
| Electrical supply capacity | |||
| Gas connection and safety | |||
| Ventilation and extraction | |||
| Water supply and waste | |||
| Clearances and airflow | |||
| Cabinet and cut-out dimensions | |||
| Anti-tip and securing | |||
| Total (max 21) | 0 | 0 | 0 |
Questions to ask before you commit
- What is the rated power of each appliance and does my supply support it?
- Will a registered installer carry out gas and fixed electrical connections?
- What certificates will I receive on completion?
- How will the hood be ducted and where does it exit?
- Are isolation valves accessible after the units are fitted?
- What ventilation gaps does each appliance need around it?
- Is a stability bracket supplied for the cooker and who fits it?
- Who is responsible if an appliance does not fit the cut-out?
Typical trade-offs
Gas hob versus induction hob
- Upside
- Gas offers familiar control and works without electricity at the hob.
- Downside
- It needs a gas supply, adds combustion products and extra ventilation requirements.
Ducted extraction versus recirculating hood
- Upside
- Ducting removes moisture and odours from the home.
- Downside
- It needs an exit route that can be hard in apartments.
Integrated appliances versus freestanding
- Upside
- Integrated units give a seamless look.
- Downside
- Fitting is more constrained and replacement choices narrow.
Common mistakes
- Having a friend connect a gas appliance; instead, use a registered gas installer and obtain a certificate.
- Ordering appliances before checking the electrical supply; instead, confirm capacity first.
- Boxing in a fridge without gaps; instead, follow ventilation distances.
- Hiding isolation valves behind fixed panels; instead, keep them reachable.
- Forgetting the anti-tip fitting; instead, secure the cooker as directed.
Related questions
Why do some ovens need a dedicated circuit?
Ovens draw high current for long periods, so the cable, protective device and connection must be sized for it. Sharing a circuit with other loads risks tripping or overheating. Rules about circuit design and who may connect fixed appliances differ by country, so ask a registered electrician to assess your supply and issue a certificate or notification where the law requires one.
Do I need a carbon monoxide alarm with gas appliances?
Many authorities strongly recommend or require one in homes with fuel-burning appliances. Faulty combustion produces carbon monoxide, which is invisible and odourless. Choose an alarm that meets the standard marked in your region, place it as the instructions state, and test it regularly. Annual servicing and correct installation remain the primary protections.
Can I fit a dishwasher myself?
Many people connect a dishwasher to existing valves and a waste spigot, which is typically a straightforward plumbing task. The electrical side is usually a plug into a socket. If new pipework, a new socket or a hidden connection is needed, a plumber or electrician should do it. Check the manufacturer's instructions and make sure the valve remains accessible.
What certificates should I keep?
Keep the gas safety record from the installer, any electrical installation or minor works certificate, the appliance manuals and guarantee documents, and the invoice. Buyers, insurers and later contractors often ask for them. Rules on which certificates are legally required vary by location, so check with your gas or electrical regulator for the documents applicable to your work.
Sources and further reading
These pages were reachable when we last checked. They informed definitions and rules referred to above; they do not endorse this guide. Where rules differ by country, check the authority for your location.
- Gas safety — Health and Safety Executive, retrieved 27 October 2026
- Electrical Safety First — Electrical Safety First, retrieved 27 October 2026
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