![At NationalBoiler.co.uk, we make buying and installing a new boiler simple, affordable, and stress-free. ✅ What We Offer: ✔ Top-brand boilers (Worcester Bosch, Vaillant, Ideal & more) ✔ Expert installation by Gas Safe engineers ✔ Competitive pricing with 0% finance options ✔ 10-year warranties for peace of mind ✔ Nationwide coverage (excluding Ireland) ✅ Why We’re the Smart Choice: ✔ 10+ years of trusted service – We know boilers inside out ✔ No pushy sales – Just honest, expert advice ✔ Quick, clean installations – Minimal disruption to your home ✔ Aftercare support – We’re here long after installation 🔥 Upgrade your heating the smart way – with NationalBoiler.co.uk! 🔧 Our Boiler Services ✔ Boiler Repairs 24/7 emergency call-outs – No one should be left in the cold! Gas Safe certified engineers – Fully qualified & trustworthy Fixed-price diagnostics – No hidden fees All makes & models covered – From Worcester Bosch to Ideal ✔ Boiler Servicing Annual safety checks – Prevent breakdowns & save money Manufacturer warranty protection – Keep your guarantee valid Thorough 12-point inspection – We check everything! Energy efficiency advice – Lower your bills ✔ Landlord Certificates CP12 Gas Safety Checks – Legally compliant for rentals Fast certification – Same-day reports 💡 Why Choose Us for Repairs & Servicing? ✅ Same-day availability – We know emergencies can’t wait ✅ Transparent pricing – No nasty surprises ✅ First-time fix guarantee – We get it right the first time ✅ Trusted by homeowners & landlords – 1,000+ 5-star reviews "Called for an emergency repair – engineer arrived within 2 hours and fixed it straight away!" ⭐⭐⭐⭐⭐ – James R., London 📅 Book Your Service or Repair Today Keep your boiler in top condition with National Boiler’s expert care: [📞 Call for Emergency Repairs 07932 84 2006] [📅 Book a Service Online] [🏠 Landlord? Get Your CP12 Certificate] Gas Safe Registered | 10+ Years Experience | Nationwide Coverage Don’t wait for a breakdown – schedule your boiler service today! 🔧🔥](https://nationalboiler.co.uk/wp-content/uploads/2025/02/National_Boiler-Combi_Boiler-System_Boiler-Regular_Boiler-Back_Boiler-Free_delivery_in_UK-Boiler_Installation-Plumbing_Heating_Installation_Repair_Services.png?1759582251)
Combi Boiler
A combi boiler is a high effeciency gas boiler that combines a central heating boiler and a water heater into single unit. It’s also known as a combination boiler. We offer Combi Boilers in UK with installation & FREE DELIVERY (subject to T&C) by Registered Gas Safe Engineer.
Showing all 20 results
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Main Eco Compact Combi 25kW NG
Original price was: £1,850.00.£1,759.00Current price is: £1,759.00. Add to basket🔥 Recommended | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For:
✅ 1-2 bedroom homes 🏠
✅ Flats & compact spaces 📏
✅ Couples & single occupants 👫
✅ Energy-conscious users 🌱 -
Main Eco Compact Combi 30kW NG
Original price was: £1,921.00.£1,859.00Current price is: £1,859.00. Add to basket🔥 Recommended | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For:
✅ 2-3 bedroom homes 🏠
✅ Homes with 1-2 bathrooms 🚿
✅ Small families 👨👩👧
✅ Space-conscious owners 📏 -
Worcester Bosch Greenstar 1000 24kW Combi Boiler NG
Original price was: £2,099.00.£1,965.00Current price is: £1,965.00. Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For:
✅ 1-2 bedroom homes 🏠
✅ Flats & compact spaces 🏢
✅ Couples & single occupants 👫
✅ Energy savers 💡 -
Worcester Bosch Greenstar 1000 30kW Combi Boiler NG
Original price was: £2,099.00.£1,965.00Current price is: £1,965.00. Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For:
✅ 2-3 bedroom homes 🏠
✅ Homes with 1-2 bathrooms 🚿
✅ First-time buyers 🔑
✅ Budget-conscious homeowners 💷 -
Worcester Bosch Greenstar 2000 25kW Combi Boiler LPG
Original price was: £2,233.00.£2,200.00Current price is: £2,200.00. Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For:
✅ 1-2 bedroom homes 🛏️
✅ Flats & small spaces 🏢
✅ First-time buyers 🔑
✅ Landlords 🏘️
✅ Energy savers 💡 -
Worcester Bosch Greenstar 2000 25kW Combi Boiler NG
£2,233.00 Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For Your Home
✅ 1-2 bedroom flats & houses (1 bathroom)
✅ Space-saving design (fits standard kitchen cupboards)
✅ Reliable 25kW performance – instant hot water
✅ A-rated 94% efficiency – lower energy bills
✅ 5-year warranty (extendable to 7 years*) -
Worcester Bosch Greenstar 2000 30kW Combi Boiler LPG
£2,389.00 Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
💨 Instant Hot Water | No waiting – hot water whenever you need it.
💰 Energy Efficient | Saves you money on bills (A-rated).
🔇 Quiet Operation | Won’t disturb your home peace.
🛠️ Easy to Use | Simple controls anyone can operate.
🛡️ 5-7 Year Warranty | Extendable protection for peace of mind. -
Worcester Bosch Greenstar 2000 30kW Combi Boiler NG
£2,389.00 Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
💨 Instant Hot Water | No waiting – hot water whenever you need it.
💰 Energy Efficient | Saves you money on bills (A-rated).
🔇 Quiet Operation | Won’t disturb your home peace.
🛠️ Easy to Use | Simple controls anyone can operate.
🛡️ 5-7 Year Warranty | Extendable protection for peace of mind. -
Worcester Bosch Greenstar 32cdi Compact Combi Boiler LPG
£2,899.00 Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For:✅ 3-4 bedroom family homes 🏠
✅ Properties with 2 bathrooms 🚿🚿
✅ Households needing constant hot water 👨👩👧👦
✅ Energy-conscious homeowners 💡 -
Worcester Bosch Greenstar 32cdi Compact Combi Boiler NG
£2,899.00 Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For:✅ 3-4 bedroom homes 🏠
✅ Homes with 2 bathrooms 🚿🚿
✅ Families needing constant hot water 👨👩👧👦
✅ Energy-conscious homeowners 💡 -
Worcester Bosch Greenstar 36cdi Compact Combi Boiler LPG
Original price was: £3,250.00.£3,200.00Current price is: £3,200.00. Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For:
✅ 4+ bedroom homes 🏠
✅ Homes with 2-3 bathrooms 🚿🚿🚿
✅ Busy family life 👨👩👧👦
✅ High hot water demand 💦 -
Worcester Bosch Greenstar 36cdi Compact Combi Boiler NG
Original price was: £3,250.00.£3,200.00Current price is: £3,200.00. Add to basket🔥 Good Value | ✅ Free delivery | ✅ Includes Installation
🏡 Perfect For:✅ 4+ bedroom homes 🏠
✅ Homes with 2-3 bathrooms 🚿🚿🚿
✅ Large families 👨👩👧👦👦
✅ High hot water demand 🔥 -
Worcester Bosch Greenstar 4000 25kW Combi Boiler NG
Original price was: £2,709.00.£2,539.00Current price is: £2,539.00. Add to basket🔥 Recommended | ✅ Free delivery | ✅ Includes Installation
You’ll love:
🔥 Always-on hot water – no more waiting for the tank to heat up
💷 Lower energy bills – 94% efficiency means more money in your pocket
📱 Easy-to-use controls – simple temperature adjustment
🔇 Quiet as a whisper – you’ll hardly notice it’s there
🛡️ 10-year worry-free warranty – when installed by our experts
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Worcester Bosch Greenstar 4000 30kW Combi Boiler NG
Original price was: £2,999.00.£2,871.00Current price is: £2,871.00. Add to basket🔥 Recommended | ✅ Free delivery | ✅ Includes Installation
🏡 Ideal For:
✅ 2-3 bedroom family homes
✅ Houses with 1-2 bathrooms
✅ Busy households needing reliable hot water -
Worcester Bosch Greenstar 8000+ 32kW Combi Boiler LPG
Original price was: £3,209.00.£3,179.00Current price is: £3,179.00. Add to basket🔥 Premium Boiler | ✅ Free delivery | ✅ Includes Installation
💡Reliable Heating for Your Family Home
✅ Ideal for 3-4 bedroom homes with 1-2 bathrooms
✅Powerful performance – hot water whenever you need it
✅ Compact and space-saving – no water tank required
✅ 94% energy efficient – keeps your bills lower
✅ Works with smart controls (Worcester Wave app)
✅Quiet operation – won’t disturb your home
✅12-year warranty* for long-term peace of mind -
Worcester Bosch Greenstar 8000+ 32kW Combi Boiler NG
Original price was: £3,209.00.£3,179.00Current price is: £3,179.00. Add to basket🔥 Premium Boiler | ✅ Free delivery | ✅ Includes Installation
💡Reliable Heating for Your Family Home
✅ Ideal for 3-4 bedroom homes with 1-2 bathrooms
✅Powerful performance – hot water whenever you need it
✅ Compact and space-saving – no water tank required
✅ 94% energy efficient – keeps your bills lower
✅ Works with smart controls (Worcester Wave app)
✅Quiet operation – won’t disturb your home
✅12-year warranty* for long-term peace of mind -
Worcester Bosch Greenstar 8000+ 36kW Combi Boiler LPG
Original price was: £3,309.00.£3,279.00Current price is: £3,279.00. Add to basket🔥 Premium Boiler | ✅ Free delivery | ✅ Includes Installation
🔥 Why You’ll Love It:
✅ Powerful Performance – Delivers a strong, steady flow of hot water (even when running multiple showers)
✅ Energy Efficient – Saves you money on bills (94% efficiency, A-rated)
✅ Compact & Space-Saving – No bulky water tank needed, freeing up storage space
✅ Whisper-Quiet – Runs quieter than a fridge (42dB)
✅ 12-Year Warranty* – One of the longest warranties on the market (*with professional installation)
✅ Smart Heating Ready – Works with the Worcester Wave thermostat for easy control -
Worcester Bosch Greenstar 8000+ 36kW Combi Boiler NG
Original price was: £3,309.00.£3,279.00Current price is: £3,279.00. Add to basket🔥 Premium Boiler | ✅ Free delivery | ✅ Includes Installation
🔥 Why You’ll Love It:
✅ Powerful Performance – Delivers a strong, steady flow of hot water (even when running multiple showers)
✅ Energy Efficient – Saves you money on bills (94% efficiency, A-rated)
✅ Compact & Space-Saving – No bulky water tank needed, freeing up storage space
✅ Whisper-Quiet – Runs quieter than a fridge (42dB)
✅ 12-Year Warranty* – One of the longest warranties on the market (*with professional installation)
✅ Smart Heating Ready – Works with the Worcester Wave thermostat for easy control -
Worcester Bosch Greenstar 8000+ Style 32kW Combi Boiler NG
£3,185.00 Add to basket🔥 Premium Boiler | ✅ Free delivery | ✅ Includes Installation
✅Output: 32kW (heating & hot water)
✅Type: Combi boiler (no cylinder needed)
✅Efficiency: 94% ErP (A-rated)
✅Hot Water Flow Rate: ~14.5 litres/min @ 35°C rise
✅Dimensions: 780mm H x 450mm W x 365mm D
✅Warranty: Up to 12 years (with professional installation)
✅Smart Ready: Pre-configured for Wave smart thermostat
✅Noise Level: 43dB (QuietMark certified)
✅Design: Matte black finish with full-colour LCD touchscreen -
Worcester Bosch Greenstar 8000+ Style 36kW Combi Boiler
£3,519.00 Add to basket🔥 Premium Boiler | ✅ Free delivery | ✅ Includes Installation
Why You’ll Love This Boiler
✅ Looks as good as it works – the stylish black design blends seamlessly into your home
✅ Simple touchscreen controls – adjust temperatures with just a tap
✅ Smart ready – control heating from bed or the office
✅ Cleans itself – saving you maintenance hassle
✅ Built for the future – ready for new eco-friendly fuels
