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Greenstar 4000
Greenstar 4000 - Image 2

Greenstar 4000

Our everyday best seller

If you're looking for a dependable boiler that won’t let you down, but still fits the budget, this is the model we recommend.

The Greenstar 4000 is Worcester Bosch’s most popular boiler, and for good reason. It balances performance, reliability, and value, making it a great fit for most homes.

It runs quietly, looks smart, and has an easy-to-use control panel. With a 10-year guarantee, it gives you plenty of peace of mind without going to the top end of the range. For many households, this is the “just right” option.
What's Included in your boiler install
✅ Certified Gas Safe Installation
✅ System flush with inhibitor protection
✅ Carbon monoxide alarm installed
✅ Magnetic filter fitted
✅ Warranty registered for 10 years
Rated 4.9/5 - 120+ reviews
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Here4Heat
Not sure which boiler is best for you?
Most people only buy a boiler once every 10–15 years, so it’s no wonder it feels complicated. That’s why we do free surveys!
Book a free survey today and we’ll match you with the right boiler
Here4Heat
Not sure which boiler is best for you?
Most people only buy a boiler once every 10–15 years, so it’s no wonder it feels complicated. That’s why we do free surveys!
Book a free survey today
(We'll match you with the right boiler!)
Worcester Bosch Specialists
Only the UK’s most trusted boilers
Speedy Booking System
Pick a date that works for you.
Local & Reliable
We fit boilers across West Sussex 

How it works

Book online in minutes
Choose 'book free home survey' for your boiler survey
Select a date & time
Book a slot that works for you.
We’ll confirm your booking
And your Here4Heat engineer will arrive to chat about the best boiler options for your home.
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Rated excellent by homeowners across the south

Why choose the Greenstar 4000?

The Greenstar 4000 is Worcester Bosch’s modern mid-range combi, designed for homes that need reliable performance with a bit more power than the entry-level models. It’s efficient, stylish, and offers the perfect balance between value and performance.

Ideal for 2–3 bedroom homes with one bathroom, it delivers dependable hot water and heating while staying quiet and compact enough to fit neatly into your home.
✅ Modern design: Sleek finish to suit today’s interiors
✅ Reliable performance: Perfect for 2–3 bedrooms and 1 bathroom
✅ Efficient running: Designed with energy savings in mind
✅ Quiet operation: Runs smoothly without disrupting your home
✅ 10-year guarantee: Full cover for parts and labour

What’s included?

With Here4Heat, everything your boiler needs is included as standard.
Up to 12 Years Warranty
Get between 5-12 years manufactures warranty on selected models
Pipework Flushed Through
Clears out dirt and sludge before your new boiler starts
Waste Disposal
We take away your old boiler and waste
Gas Safe Installation
Certified and registered for safety
Carbon Monoxide Alarm
(worth £30)
Alerts you if carbon monoxide is detected
Standard Controls
(worth £130)
Easy-to-use thermostat included
Corrosion Inhibitor Added
(worth £20)
Protects pipes and radiators for years to come
Magnetic Filter
(worth £80)
Keeps your system clean and running longer
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Not sure if the 4000 is right for you?

Here’s a simple guide based on the homes we fit boilers in every day:
For smaller homes
Greenstar 1000 
Best for flats or small homes with 1 bathroom
For families
Greenstar 4000
Better for medium homes (2–3 bedrooms, 1–2 bathrooms)
Premium
Greenstar 8000
The premium option for any size home

Why choose Here4Heat?

For your new combi boiler
Engineer-Recommended
Boilers Chosen by Experts
Selected by heating engineers for quality and reliability, not by salespeople.
Trusted Local Team
Same Team All the Way
Deal directly with our friendly team from quote through to installation.
Gas Safe Approved
Certified Gas Safe Engineers 
Every engineer is Gas Safe registered, giving you safe, professional work.
Fixed Quotes
Clear Pricing You Can Trust
Upfront quotes with no extras added later and no hidden surprises.
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Rated 5★ by local customers

Areas we cover

We provide expert installation services throughout West Sussex and the surrounding areas.

If your location isn't listed, please don't hesitate to contact us. We'll do our best to accommodate you.
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Help!
Still feeling overwhelmed?
That’s exactly what our free boiler survey is for!
With a free survey, we’ll check your home and make sure you end up with the boiler that fits your needs.
Book a Free Boiler Survey Today
Help!
Still feeling overwhelmed?
That’s exactly what our free boiler survey is for!
With a free survey, we’ll check your home and make sure you end up with the boiler that fits your needs.
Book a Free Boiler Survey Today

Frequently asked questions

Prices vary depending on the model and your home’s needs. During your free boiler survey, we’ll recommend the right Worcester Bosch boiler and provide a clear, fixed-price quote.

If your boiler is over 10–15 years old, keeps breaking down, or is no longer efficient, it may be more cost-effective to replace it with a modern combi boiler.

Most combi boiler installations are completed in 1–2 days. We’ll give you a clear timescale before starting work.

There may be a short period during installation, but our engineers aim to keep disruption to a minimum and get your heating back on as quickly as possible.

Yes, all our Worcester Bosch combi boilers come with long manufacturer guarantees (up to 12 years) for peace of mind.

Absolutely! You can book your free boiler survey online in minutes, and our team will confirm a date that suits you.

Ready to get your new boiler sorted?

Click below to arrange your free home survey, we’ll visit at a time that suits you and handle everything from there.
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With over 30 years of experience working in heating, plumbing and renewable energy for the local community, Here4Heat are experts in their field.

Areas we cover: Chichester, Bognor Regis, Worthing, Hove, Havant, Fishbourne, Littlehampton, Arundel, Portsmouth, Southsea, Midhurst, Fontwell, Tangmere, Witterings.

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About Us

Contact Us

  • Worthing: 01903 250139
    Chichester: 01243 774447
  • Monday to Friday: 8am - 5pm
Here4Heat Ltd, registered address Unit 16, Northbrook Business Park, Worthing, West Sussex, BN14 8PQ, company number 08655130 is an Introducer Appointed Representative of TradeHelp. Our firm reference number is 996003. TradeHelp is a trading style of Tradehelp Ltd, Marchwiel Centre, Bryn Lane, Wrexham Ind Est, LL13 9UT, registered in England (03712438), authorised and regulated by the Financial Conduct Authority (firm reference number 697812). TradeHelp are a credit broker, not a lender, and offer loans from a small panel of carefully selected lenders. TradeHelp do not offer financial advice and do not charge you for credit broking services. All loans are subject to status.

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