Expert Boiler Replacements & New Installations
Upgrade to a new, energy-efficient boiler with professional installation from Watford's trusted heating experts. Free surveys, competitive prices, and up to 10 years warranty.
Is Your Old Boiler Costing You a Fortune?
If your boiler is over 10 years old, chances are it is operating at a fraction of its original efficiency. Older boilers typically run at around 60-70% efficiency, meaning up to 40% of the gas you pay for is being wasted. Modern A-rated boilers achieve efficiency levels of 92% or higher, which could save you hundreds of pounds every year on your energy bills.
Beyond the energy savings, a new boiler provides peace of mind. No more worrying about breakdowns during cold winter nights, no more expensive emergency repair callouts, and no more struggling to find replacement parts for obsolete models. With manufacturer warranties of up to 10 years, a new boiler is an investment in your home's comfort and value.
Up to 30%
Energy savings
£300+
Annual savings
Up to 10 Years
Warranty
A-Rated
Efficiency
Why Choose J&L for Your Boiler Installation?
A boiler installation is only as good as the engineer who fits it. With over 20 years of experience in the heating industry, Lawrence Giandri and the J&L team deliver installations that are not only technically excellent but backed by genuine expertise and friendly, professional service. We take pride in every installation, treating your home with the respect it deserves.
Free Site Surveys
We visit your home to assess your needs and provide an accurate quote with no obligation.
Expert Advice
Over 20 years experience means we recommend the perfect boiler for your home and budget.
Clean & Tidy
We respect your home. All work areas are left clean and tidy upon completion.
Safety First
Gas Safe registered with all work completed to building regulations and manufacturer standards.
Which Type of Boiler is Right for Your Home?
Choosing the right type of boiler is crucial for optimal performance, efficiency, and comfort. Understanding the differences between combi, system, and regular boilers will help you make an informed decision. During your free survey, we will assess your home and recommend the best option based on your property size, water usage, and budget.
Combi Boilers
The most popular choice for UK homes, combi boilers provide instant hot water on demand without the need for a separate water tank or cylinder. They are compact, efficient, and ideal for small to medium-sized homes with one or two bathrooms.
- Instant hot water
- Space-saving design
- No separate tank needed
- Lower installation costs
System Boilers
System boilers work with a hot water storage cylinder, making them perfect for homes with higher hot water demands. They can supply multiple bathrooms simultaneously and are compatible with solar thermal systems for even greater efficiency.
- High hot water output
- Works with multiple bathrooms
- Solar compatible
- Strong water pressure
Regular Boilers
Also known as conventional or heat-only boilers, these traditional systems work with both a hot water cylinder and cold water storage tank. They are often the best replacement option for older properties with existing pipework.
- Ideal for older properties
- High hot water demand
- Compatible with existing systems
- Works with low water pressure
Our Professional Installation Process
From your first enquiry to the final handover, we make the boiler installation process straightforward and stress-free. Here is what you can expect when you choose J&L Gas & Renewables for your new boiler installation in Watford and the surrounding areas.
Free Survey
We visit your home to assess requirements and discuss options.
Quote & Advice
Receive a detailed quote with expert recommendations.
Installation Day
Professional installation, typically completed in one day.
Handover
Full demonstration, warranty registration, and aftercare advice.
What's Included in Every Installation
At J&L Gas & Renewables, we believe in complete transparency. Our installation quotes include everything you need for a professional, compliant installation with no hidden extras. Here is what is included as standard with every boiler installation we complete:
- Removal and safe disposal of old boiler
- Supply and fit of new boiler
- Magnetic system filter for protection
- System inhibitor chemical treatment
- Full system flush if required
- Gas and water connections
- Building regulations notification
- Manufacturer warranty registration
- Full demonstration of controls
- Benchmark commissioning certificate
Our Commitment to Quality & Customer Satisfaction
When you choose J&L Gas & Renewables for your boiler installation, you are choosing a company that genuinely cares about getting the job done right. We are not a large national chain where you are just another number—we are a local Watford business built on reputation and word-of-mouth recommendations. Every installation is carried out by experienced, fully qualified engineers who take pride in their work.
We understand that a new boiler is a significant investment for any homeowner. That is why we take the time to explain your options, provide honest advice, and never pressure you into a decision. Whether you choose the most economical option or a premium installation with all the extras, you will receive the same high standard of workmanship and customer care.
Our 4.93-star rating on TrustATrader speaks for itself. We have built our reputation on delivering what we promise: professional service, fair prices, and heating systems that work reliably for years to come. Read our reviews and see why homeowners across Watford, Bushey, Rickmansworth, and Hertfordshire trust J&L for their boiler installations.
Boiler Installation FAQs
Have questions about boiler installations? Here are answers to the most common questions we receive from homeowners in Watford and Hertfordshire. If you cannot find the answer you are looking for, please do not hesitate to give us a call.
Book Your Free Boiler Survey Today
Ready to upgrade your heating system? The first step is a free, no-obligation survey where we assess your home, discuss your requirements, and provide an accurate fixed-price quote. There is absolutely no pressure and no hard sell—just honest advice from experienced professionals.
Our free survey includes a thorough assessment of your current heating system, recommendations on the best boiler type and size for your home, discussion of any pipework modifications that may be needed, and a clear, itemised quote with no hidden costs.
- Assessment of your heating requirements
- Recommendations on boiler type and size
- Discussion of any pipework changes needed
- Clear, detailed written quote
- Finance options explained
Prefer to call?
07843 900760