Storage Heater Installation in Merton
14 qualified electricians available for storage heater installation in Merton, London. Upfront pricing, book online.
Get AI report
14 electricians for storage heater installation in Merton
BNW Electrical & Heating Services Ltd
Merton, CR4 3FH
British Heating & Electrical
Merton, SW19 1BS
Electro Expert Ltd
Merton, CR4 1NF
Emcon Services Ltd
Merton, KT3 4PT
F P Heating & Plumbing
Merton, SW19 8HS
Jimmy Electrical & Plumbing
Merton, CR4 3BZ
London Refurbishment Service Ltd
Merton, SM4 4AH
MPC Electrics and Handyman
Merton, SW19 1PG
Robert Heath Heating Limited
Merton, KT3 4NN
Rygas Ltd
Merton, KT3 4PB
Sparkvolt Electrical Services Ltd
Merton, CR4 3JS
T G Electrical
Merton, CR4 2HR
United Gas and Boiler Services Ltd
Merton, SM4 5SJ
Wright & Wright
Merton, CR4 2ER
About storage heater installation in Merton
Storage heaters store thermal energy during off-peak electricity hours (typically overnight on Economy 7 or Economy 10 tariffs) and release it gradually during the day. Each heater requires a dedicated circuit or a correctly rated spur from a dedicated heating circuit, connected through an off-peak meter or time switch. The installation covers the electrical circuit from the consumer unit, the off-peak switching arrangement, wall mounting of the heater, and commissioning. Modern storage heaters with fan-assisted output and electronic controls offer significantly better comfort and efficiency than older static models.
Storage heaters draw significant current — a single 2.55kW heater draws over 11 amps, and a typical property may have 3-5 heaters totalling 8-15kW. The off-peak circuit must be correctly configured through a time switch or smart meter, with adequate cable sizing and MCB protection for the combined load. Incorrect installation can result in heaters running on peak-rate electricity (tripling your heating costs) or overloading circuits. A new heating circuit from the consumer unit is notifiable under Part P.
What's included
- Property survey and room-by-room heat loss assessment
- Dedicated heating circuit from consumer unit
- Off-peak time switch or contactor installation (if not on a smart meter)
- Cable run to each heater position with correctly rated MCB/RCBO
- Storage heater wall mounting on manufacturer's brackets
- Electrical connection via fused connection unit
- Off-peak switching verification and timing setup
- Full circuit testing to BS 7671 standards
- Electrical Installation Certificate (EIC)
- Part P Building Control notification
Typical cost
Storage Heater Installation in Merton typically costs £350–£800 per heater. Every job is different — describe what you need and a qualified electrician will quote you directly.
Regulations & standards
- Part P of the Building Regulations (Approved Document P): A new heating circuit from the consumer unit is notifiable electrical work. It must be carried out by an electrician registered with a competent person scheme, or inspected by Building Control.
- BS 7671:2018+A2:2022 (IET Wiring Regulations): Storage heater circuits must comply with the Wiring Regulations, including correct cable sizing for the load, appropriate MCB/RCBO protection, and the requirements for fixed heating appliances.
- Electricity Safety, Quality and Continuity Regulations 2002 (ESQCR): The DNO may need to be notified if the total connected load significantly increases the property's maximum demand. Properties adding multiple high-wattage storage heaters may require a main fuse upgrade.
Storage Heater Installation FAQs
How does a storage heater work?
Storage heaters contain clay or ceramic bricks that are heated by electrical elements during cheap off-peak hours (usually 11pm-7am on Economy 7). The stored heat is then released gradually during the day. The input control sets how much heat is stored; the output control (or fan, on modern models) controls how quickly it is released.
Do I need Economy 7 for storage heaters?
You need a dual-rate electricity tariff — Economy 7, Economy 10, or a smart tariff with off-peak periods. Without a cheaper off-peak rate, storage heaters charge at the standard electricity price, making them very expensive to run. Contact your energy supplier to check or switch your tariff.
What is the difference between static and fan-assisted storage heaters?
Static storage heaters release heat passively through convection — you have limited control over when heat is released. Fan-assisted (or dynamic) storage heaters have a fan that blows air over the hot bricks on demand, giving you much better control. Modern high-retention models keep most heat stored until you need it.
Are there grants available for storage heaters?
The ECO4 scheme provides government-funded energy efficiency improvements for low-income and fuel-poor households. This can include replacing old inefficient storage heaters with modern high-retention models. Check eligibility via your energy supplier or the Simple Energy Advice service (gov.uk).
How much does it cost to run storage heaters?
A single 2.55kW storage heater costs approximately £40-60 per month on an Economy 7 tariff (charging for 7 hours at the off-peak rate). A typical 3-bed house with 4 heaters costs £150-250 per month in winter. Costs vary significantly based on tariff rates, insulation quality, and heater efficiency.
Run a maintenance company?
Get an AI report on how Tradejoy can handle enquiries, quotes, scheduling, customer updates, payments, traders, and certificates across your team.
Get AI report