Recommended installers / London & South East / Option Energy Solutions
Heat Geek Elite and MCS certified heating engineers from Steyning, fitting Vaillant and Viessmann heat pumps and boilers across West Sussex.
Our recommended installer
Looking for a heat pump installer in Sussex? We recommend Option Energy Solutions. Based in Steyning, they are Heat Geek Elite, MCS certified and Trading Standards Approved, with more than 20 years' experience in heating.
Option Energy Solutions is an award-winning heating company based in Steyning, West Sussex. Director and lead heating engineer Michael Paini runs a small, local team, with trainee heating engineer Yevgen on the tools and Linda in the office. The engineers are manufacturer trained by Vaillant and Viessmann.
Every heat pump starts with a look at the property, the existing heating and the hot water needs, followed by heat loss calculations for the whole home and for each room. Alongside heat pumps, they fit and service gas boilers, run boiler cover plans, and look after solar thermal and commercial heating systems.
Reviews
Services
Heat pumps are their main focus, with ATAG and Viessmann boilers too, and they handle the grant for you.
Vaillant and Viessmann air source heat pumps, designed room by room around your home.
See the heat pumpsThey apply for the £7,500 grant for you and take it off your quote.
See the grantHeat pumps
Option fit Vaillant and Viessmann air source heat pumps. They have fitted the Vaillant aroTHERM plus from 3.5kW to 12kW, including a pair of units for a Sussex farmhouse and its stables, and Viessmann is their heat pump manufacturer partner.
Vaillant
Vaillant's monobloc heat pump, using natural R290 refrigerant. It reaches flow temperatures up to 75°C, so it suits older homes as well as new ones.
Viessmann
Viessmann's monobloc air source heat pump, using natural R290 refrigerant. Option commissioned their first Vitocal 150 in Sussex in July 2025.
Exact models, sizes and guarantees are confirmed in your quote. See the funding options →
Heat pump funding in England
Option are MCS certified, so their heat pump installations qualify for the government's Boiler Upgrade Scheme. They apply for you, and the grant comes off your quote.
Off the cost of an air source or ground source heat pump that replaces fossil fuel heating.
Extra for homes heated by oil or LPG with no mains gas, taking the grant to £9,000. Available until March 2027.
Heat pumps installed in homes are zero-rated for VAT until March 2027.
You don't need to be on benefits. Homeowners, landlords, second home owners and businesses can all qualify.
| System | Standard grant | Oil or LPG, no mains gas |
|---|---|---|
| Air source heat pump | £7,500 | £9,000 |
| Ground source heat pump | £7,500 | £9,000 |
| Air-to-air heat pump | £2,500 | £2,500 |
The extra £1,500 is available until March 2027. One grant per property. Limits apply: 45kWth for a single system and 70kWth for more than one heat pump.
Option survey your home, work out its heat loss and give you a written quote with the grant shown on it.
As an MCS certified installer, Option apply to Ofgem for the grant on your behalf.
Ofgem contact you to check that Option are acting for you. Reply to confirm.
Option install and commission the heat pump within 120 days of applying, and the grant is taken off what you pay.
Figures from GOV.UK (Boiler Upgrade Scheme), checked November 2026. Scotland has its own scheme through Home Energy Scotland.
Boilers
Most of the gas boilers Option fit are ATAG, with Viessmann too, and they can set a new system up ready for a heat pump later.
ATAG
ATAG's high-efficiency combi with built-in heat recovery, described as the combi of the future.
Viessmann
Viessmann's wall-mounted gas condensing boiler, as a combi or a system boiler.
Recent jobs
A few of the heat pumps Option have fitted across Sussex, taken from their own case studies.
Hove, East Sussex
An old boiler, a vented cylinder and a noisy shower pump made way for a 7kW aroTHERM plus and a 210 litre Vaillant unvented cylinder, so the home now has mains pressure hot water. Outside, the pipework runs in neat black trunking.
Burgess Hill, West Sussex
A young couple's first home had no spare cupboard and clay soil in the garden. Option fitted a 3.5kW aroTHERM plus on a premium base, with a 150 litre slimline Joule Cyclone+ cylinder and everything else inside a 500mm wide space.
West Sussex
A house several hundred years old, with wattle and daub walls, now runs on a 12kW aroTHERM plus with new radiators and pipework. In its first five days it measured an efficiency of 660%, heating the home for 1.25p per kWh on off-peak rates.
Pulborough, West Sussex
A three-bedroom semi with no gas supply on the street swapped its old storage heaters for an 8kW Viessmann Vitocal 222-A, with a built-in 250 litre hot water cylinder. Viessmann wrote up the job, and Channel 5 filmed it.
Accreditations
These are the accreditations, memberships and awards Option Energy Solutions hold, as shown on their own website.
Heat Geek Elite
MCS certified
Gas Safe registered
Trading Standards Approved
Award winning
Vaillant trained
Viessmann trained
ATAG boilers
1% for the PlanetOption have also shared their experience with Nesta's Heat Pump Mentoring Scheme, which helps other installers raise their standards.
FAQs
Yes. Option Energy Solutions are MCS certified, so homeowners in England and Wales can get £7,500 off an air source or ground source heat pump through the Boiler Upgrade Scheme, or £9,000 for homes heated by oil or LPG with no mains gas until March 2027. Option apply for the grant and take it off your quote.
Option Energy Solutions are based in Steyning and cover West Sussex, including Worthing, Shoreham-by-Sea, Lancing, Horsham, Pulborough, Burgess Hill, Brighton and Hove. They also work in parts of East Sussex, Surrey and Kent, so it is worth asking if you are nearby.
Yes. Option Energy Solutions are Heat Geek Elite installers. Elite is the upper tier of Heat Geek's installer network, for installers whose systems are checked for high efficiency, and Option design each heat pump to run at low flow temperatures.
Often, yes. Option Energy Solutions have fitted heat pumps in a 1910 farmhouse with stables and a historic wattle and daub home in West Sussex. A heat loss survey shows what your home needs, including any new radiators or pipework, before you get a written quote.
Option Energy Solutions can offer up to an 18 year manufacturer-backed guarantee on ATAG and Viessmann boilers they install, as long as the boiler is serviced every year. The exact guarantee depends on the model and is confirmed in your quote.
Get in touch
Tell us a little about what you need and we will pass your details straight to Option Energy Solutions. They will be in touch to talk it through and arrange a survey.
We only recommend installers we know and work with. Option Energy Solutions carry out the survey, quote and installation, and your contract is with them.
Visit the Option Energy Solutions websiteMore recommended installers
See our other recommended installers in London and the South East, or browse every region.
Social media
Latest from Option on LinkedIn
Recent jobs and news from Michael and the team.