Combi Boiler Installation Gravesend

What Is a Combi Boiler?

A combination (combi) boiler is the UK's most popular type of boiler, providing both central heating and instant hot water without the need for a separate hot water cylinder or cold water tank. This makes them ideal for homes with limited space.

Benefits of Combi Boilers:

• Space-Saving: No need for tanks in the loft or airing cupboard
• Instant Hot Water: Hot water on demand, no waiting for tanks to heat up
• Energy Efficient: Only heats water when you need it, reducing waste
• Cost-Effective: Lower installation costs compared to system boilers
• Better Water Pressure: Mains pressure hot water for powerful showers
• Easier Installation: Simpler system means faster fitting

Is a Combi Boiler Right for Your Home?

Combi boilers are perfect for:

• Small to medium-sized homes (up to 3-4 bedrooms)
• Properties with 1-2 bathrooms
• Homes with good mains water pressure
• Flats and apartments with limited space
• First-time buyers looking for an affordable solution

Not ideal for: Very large homes with multiple bathrooms in simultaneous use, or properties with poor mains water pressure. In these cases, a system boiler may be more suitable.

Best Combi Boilers in 2025

Worcester Bosch Combi Boilers

Worcester Bosch is Britain's most trusted boiler brand. Their Greenstar range offers exceptional reliability:

• Greenstar 2000: Entry-level combi, 5-7 year warranty - From £2,200 fitted
• Greenstar 4000: Mid-range combi, 10 year warranty - From £2,600 fitted
• Greenstar 8000: Premium combi, 12 year warranty - From £3,200 fitted

Vaillant Combi Boilers

Vaillant boilers are German-engineered for outstanding performance:

• ecoTEC Plus: 7-10 year warranty - From £2,400 fitted
• ecoTEC Exclusive: 10-12 year warranty - From £3,000 fitted

Viessmann Combi Boilers

Viessmann offers premium quality with excellent efficiency:

• Vitodens 050-W: 7 year warranty - From £2,300 fitted
• Vitodens 100-W: 10 year warranty - From £2,800 fitted

Our Combi Boiler Installation Service

At Hixa Heating, we provide complete combi boiler installation throughout Gravesend and surrounding areas. Our service includes:

• Free home survey and written quotation
• Removal and disposal of your old boiler
• Installation of your new combi boiler
• All pipework, flue, and connections
• System flush and inhibitor treatment
• Magnetic filter installation (recommended)
• Building Regulations compliance certificate
• Gas Safe certification
• Manufacturer warranty registration
• Full demonstration and handover

Most combi boiler installations are completed in 1-2 days, with minimal disruption to your daily routine.

Choosing the Right Combi Boiler Size

Selecting the correct combi boiler size is crucial for ensuring you have adequate heating and hot water in your home. Combi boilers are rated in kilowatts (kW), which indicates their output power. The right size depends on several factors including the number of bedrooms, bathrooms, radiators, and your property's insulation levels.

For most homes in Gravesend, we typically recommend the following sizes:

• 24-28kW: Small homes, flats, or 1-2 bedroom properties with one bathroom
• 28-32kW: Medium-sized homes with 2-3 bedrooms and one bathroom
• 32-35kW: Larger 3-4 bedroom homes with 1-2 bathrooms
• 35-42kW: Large family homes with 4+ bedrooms and 2 bathrooms

During our free home survey, our experienced engineers will assess your property's heating requirements and recommend the perfect boiler size. An undersized boiler will struggle to meet your hot water demands, while an oversized boiler wastes energy and money. We ensure you get exactly what you need for optimal efficiency and comfort.

We also consider your mains water pressure during our assessment, as combi boilers rely on good water pressure to deliver hot water effectively. If your pressure is low, we can advise on solutions or recommend alternative boiler types that may be more suitable.

The Combi Boiler Installation Process

At Hixa Heating, we pride ourselves on providing professional, efficient combi boiler installations with minimal disruption to your daily life. Our comprehensive installation service is designed to ensure everything is completed to the highest standards, with full compliance with all relevant building regulations and safety requirements.

The typical installation process takes 1-2 days, depending on the complexity of the job. Here's what you can expect:

Day 1: Removal and Installation

Our engineers arrive promptly at the agreed time and begin by protecting your property with dust sheets. We'll remove your old boiler system, including any tanks, cylinders, and associated pipework that are no longer needed. All waste is disposed of responsibly and legally. We then position and securely mount your new combi boiler, connect the gas supply, install the flue system, and connect all pipework for heating and hot water.

Day 2: System Flush and Commissioning

On the second day, we perform a thorough power flush of your heating system to remove sludge, rust, and debris that could damage your new boiler. We add central heating inhibitor to protect against future corrosion and install a magnetic filter (included as standard) to capture metal particles. The boiler is then commissioned, tested, and balanced to ensure optimal performance.

Before we leave, we provide you with a full demonstration of how to operate your new boiler and controls, answer all your questions, hand over all certification including Gas Safe certificate and Building Regulations compliance, and register your manufacturer warranty. We also ensure your home is left clean and tidy.

Combi Boiler Installation Costs in Gravesend

One of the most common questions we receive is "how much does a combi boiler installation cost?" The honest answer is that prices vary depending on several factors, but we're always transparent about our pricing with no hidden costs or surprise charges.

Typical combi boiler installation costs in Gravesend range from £2,000 to £3,500, depending on the brand, model, and boiler size you choose. This includes everything: removal of your old boiler, supply and installation of the new combi boiler, all necessary pipework and flue work, system flush and inhibitor, magnetic filter, Gas Safe certification, Building Regulations compliance certificate, and manufacturer warranty registration.

What Affects the Cost?

• Boiler Brand and Model: Entry-level brands start from £2,000, while premium brands like Worcester Bosch Greenstar 8000 can cost from £3,200
• Boiler Size: Larger output boilers (35kW+) cost slightly more than smaller models
• Installation Complexity: Straightforward swaps are cheaper than relocating a boiler or extensive pipework changes
• Additional Work: New radiators, upgraded controls, or extensive pipework modifications add to the cost
• Warranty Length: Premium models with 10-12 year warranties cost more than 5-7 year warranty models

We provide free, no-obligation written quotes after visiting your property. Our quotes are detailed and transparent, clearly showing what's included so there are no surprises. Visit our prices page for more detailed pricing information, or call us today on 01474 554887 for your free quote.

Energy Efficiency and Savings

Modern combi boilers are significantly more energy efficient than older models, which can lead to substantial savings on your heating bills. If you're currently using a boiler that's 10-15 years old, upgrading to a new combi boiler could reduce your energy consumption by up to 30%, saving you hundreds of pounds per year on gas bills.

All new combi boilers we install are A-rated for energy efficiency, achieving efficiency levels of 92-94%. This means that for every £1 you spend on gas, 92-94p is converted into useful heat for your home, with only 6-8p wasted. In contrast, old inefficient boilers may be only 60-70% efficient, wasting 30-40p of every pound spent on fuel.

Key Energy Efficiency Features:

• Condensing Technology: Recovers heat from flue gases that would otherwise be wasted
• Modulating Burners: Adjust flame size to match heating demand, reducing gas waste
• Weather Compensation: Some models adjust output based on outside temperature
• Smart Controls Compatible: Works with smart thermostats for optimized scheduling
• Hot Water Priority: Ensures efficient hot water delivery on demand

The Energy Saving Trust estimates that replacing a G-rated boiler (less than 70% efficient) with a new A-rated condensing combi boiler could save you £315-£395 per year on average. Over the typical 10-15 year lifespan of a boiler, that's potentially £3,150 to £5,925 in savings. Combined with smart controls and proper system maintenance through annual servicing, you can maximize your energy savings and reduce your carbon footprint.

Warranties and Guarantees

When you invest in a new combi boiler with Hixa Heating, you're protected by comprehensive manufacturer warranties and our commitment to quality workmanship. We're accredited installers for all major boiler brands, which means we can offer you the maximum warranty periods available—up to 12 years on selected models.

Manufacturer Warranties:

Different brands and models come with varying warranty periods:

• Worcester Bosch Greenstar 2000: 5-7 year parts and labour warranty with accredited installation
• Worcester Bosch Greenstar 4000: 10 year parts and labour warranty with accredited installation
• Worcester Bosch Greenstar 8000: 12 year parts and labour warranty with accredited installation
• Vaillant ecoTEC Plus: 7-10 year warranty with Advance installation
• Vaillant ecoTEC Exclusive: Up to 12 year warranty with Advance installation
• Viessmann Vitodens: 7-10 year warranty depending on model

These extended warranties are only available when your boiler is installed by an accredited installer like Hixa Heating. Non-accredited installations typically receive only a standard 1-2 year warranty, leaving you exposed to expensive repair costs much sooner.

Our Installation Guarantee:

In addition to manufacturer warranties, we guarantee our workmanship. If any issues arise due to our installation work, we'll return to fix them free of charge. We also provide ongoing support and advice throughout the life of your boiler, and offer annual servicing packages to keep your boiler running efficiently and maintain your warranty validity (most manufacturers require annual servicing to keep warranties active).

Peace of mind is included with every installation. You can trust that your investment is protected for years to come.

Why Choose Hixa Heating for Your Combi Boiler Installation?

There are many heating companies in Kent, so why should you choose Hixa Heating for your combi boiler installation? We believe our combination of local expertise, professional service, competitive pricing, and commitment to customer satisfaction sets us apart from the competition.

Our Key Advantages:

• Fully Gas Safe Registered: All our engineers are legally qualified to work with gas appliances and carry valid Gas Safe ID cards
• Accredited Installers: We're approved by Worcester Bosch, Vaillant, and Viessmann, offering maximum warranties
• Local Family Business: Based in Gravesend, we serve our local community with pride and care about our reputation
• Transparent Pricing: Free written quotes with no hidden costs or pressure sales tactics
• Expert Advice: Honest recommendations based on your needs, not our profit margins
• Premium Brands Only: We only install quality boilers from trusted manufacturers
• Professional Installation: Clean, efficient work with minimal disruption to your home
• Full Compliance: All work meets Building Regulations and Gas Safety standards
• Aftercare Service: Ongoing support, annual servicing, and emergency repairs available
• Customer Focused: Hundreds of satisfied customers across Gravesend and Kent

We're not a high-pressure sales company. We won't try to sell you the most expensive boiler if a more affordable option suits your needs perfectly. Our goal is to build long-term relationships with our customers by providing honest advice, quality installations, and excellent service.

Frequently Asked Questions About Combi Boilers

How long does a combi boiler last?

With proper annual servicing and maintenance, a quality combi boiler should last 10-15 years. Premium brands like Worcester Bosch and Vaillant often exceed this, with some lasting 20+ years. Regular servicing is essential to maximize lifespan.

Can I shower while someone uses hot water elsewhere?

Modern combi boilers have improved hot water flow rates, but there can be a slight drop in pressure when multiple hot water outlets are used simultaneously. For homes with high simultaneous demand (multiple bathrooms in use at once), a system boiler might be more suitable.

Do combi boilers work with power showers?

Combi boilers provide mains pressure hot water, so you don't need a separate power shower pump. In fact, you cannot use a power shower with a combi boiler. The mains pressure is usually sufficient for a powerful shower experience with a modern thermostatic mixer valve.

What size hot water cylinder do I need to remove?

One of the great benefits of switching to a combi boiler is that you can remove your hot water cylinder completely, freeing up valuable space in your airing cupboard. You'll also be able to remove any cold water tanks from your loft. We handle all removal and disposal as part of our installation service.

Will I save money with a combi boiler?

Yes, if you're replacing an old inefficient boiler. New A-rated combi boilers are 92-94% efficient, compared to 60-70% for older models. This can save £300+ per year on gas bills. You'll also save money by not heating a full cylinder of hot water that you might not use.

How much does a combi boiler cost to run?

Running costs depend on your home size, insulation, and usage patterns. On average, a typical 3-bedroom home in the UK spends £700-£1,200 per year on gas for heating and hot water. A modern efficient combi boiler can reduce this by 20-30% compared to an old boiler.

Do I need to service my combi boiler every year?

Yes, annual servicing is essential and usually required to maintain your manufacturer warranty. An annual service costs from £80 and helps prevent breakdowns, maintains efficiency, ensures safety, and can identify minor issues before they become expensive problems. We offer annual service plans for convenience and peace of mind.

Have more questions? Call us on 01474 554887 and our friendly team will be happy to help.

Gas Safe Registered Engineers

All our heating engineers are fully Gas Safe registered and trained to the highest standards. By law, anyone working on gas appliances in the UK must be on the Gas Safe Register. We're also accredited installers for Worcester Bosch, Vaillant, and Viessmann, ensuring you receive the maximum manufacturer warranty on your new combi boiler.

When our engineers visit your property, they'll always carry their Gas Safe ID card and you're welcome to ask to see it. You can also verify our Gas Safe registration online at www.gassaferegister.co.uk. We're fully insured with public liability coverage, giving you complete peace of mind.

Combi Boiler Installation Areas

We install combi boilers throughout Gravesend, Northfleet, Dartford, Greenhithe, Swanscombe, Milton, Denton, Chalk, and all surrounding areas in Kent.

As a local Gravesend-based company, we're never far away when you need us. Whether you need a new combi boiler installation, an emergency repair, or annual servicing, we provide fast, reliable service throughout our local area. We're proud to serve our community and have built our reputation on quality work and excellent customer service.

Ready to upgrade to a new energy-efficient combi boiler? Contact Hixa Heating today on 01474 554887 for your free, no-obligation quote.