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Domestic Services

Gas, Oil, & LPG Boiler Installation Services

At GasWise, we install gas, oil, and LPG boilers for households across areas such as Warwick, Banbury, Daventry, and beyond. Whether you're replacing an old unit, fitting a new system during a renovation, or installing heating where there wasn't any before, our experienced engineers deliver safe, efficient installations with minimal disruption.

With over 100 years of combined experience within our team, our Gas Safe, OFTEC-registered professionals are just a phone call away from delivering your new boiler system.

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What Types of Boilers Do We Install?

We install three main types of boilers to suit different home layouts and heating needs.

Conventional (Regular) Boilers: These work with both a hot water cylinder and a cold water tank, ideal for larger properties or homes with multiple bathrooms.
Combi Boilers: These are compact units that provide instant hot water and central heating without a separate tank, making them one of the most popular options in the UK.
System Boilers: These draw water directly from the mains and store the heated water in a cylinder, keeping it ready for use when needed.

Our engineers will help you choose the right boiler type to match your household’s heating and hot water needs. Simply contact us to discuss your requirements.

Call us on 01295 597 961

What Boiler Fuel Types Are Available?

Our team is experienced in installing gas, oil, and LPG boilers, each of which has different running costs and installation requirements:

Gas boilers burn mains-supplied natural gas to heat water for central heating and hot water. They are ideal for homes connected to the gas network and come in combi, system, or regular models.
Oil boilers use oil stored in an external tank, making them suitable for properties off the gas grid. They provide high efficiency and are installed following OFTEC safety guidance.
LPG boilers run on liquefied petroleum gas (propane or butane) delivered via cylinders or tanks. They are a practical alternative where natural gas isn’t available.

Why Choose GasWise?

Here’s why our clients choose us to complete their boiler installations…

Certified Professionals: Every engineer on our team is registered with Gas Safe and OFTEC, guaranteeing safe and expert installations
Round-the-Clock Emergency Response: We’re available 24/7 to address urgent issues whenever they occur
Fully Insured & Guaranteed Work: All installations come with full insurance coverage and our workmanship guarantee for your reassurance
Transparent Pricing: We provide honest, upfront pricing with no hidden costs, ensuring you know exactly what to expect

Our Installation Process

If you’re wondering what’s involved in our boiler installations, here’s what to expect:

Initial Consultation

Tell us about your property and needs - this provides us with key details to advise on likely options and costs.

Site Survey & Quote

A member of our team visits to inspect your property, measure rooms, check flues and pipe routes, and provide a fixed written quote.

Order & Scheduling

Once you approve the quotation, we order the equipment and book an installation date that suits you.

Installation Day(s)

Our team completes the work, fits the boiler and controls, connects pipework and flues, and cleans up after themselves.

Commissioning & Handover

We fully commission the system, demonstrate how to use controls, and leave all paperwork, certificates, and warranty details.

Follow-Up & Servicing

Optional service plans are available to keep your warranty valid and maintain performance.

Emergency Call‑Outs

Boiler breakdowns don’t always happen at convenient times. That’s why our engineers are on hand for emergency callouts, providing a fast, reliable response to restore heating and hot water when you need it most.

Don’t wait for your issue to worsen - the GasWise team will provide the answers to your immediate concerns.

Book Emergency Call-Out

Reviews:

Ruth Lewis

Fantastic work carried out on a tired shower room that was long over due a refit. Dan and the team were professional, friendly with excellent attention to detail nothing was too much trouble. We are thrilled with the final results!!!

Luke Taylor

We had our boiler serviced by gaswise for the last couple of years and the service has always been great. We had Jake come over this time and he went above and beyond by sorting out a loose tap that he noticed while servicing. It may seem like a small thing but goes to show how he goes above and beyond for his customers. Thanks for your help.

John Robinson

Very diligent company. Installation of two commercial boilers into a large church. Thorough site surveys carried out over three visits including specialist flue manufacturer and the boiler manufacturers. Well managed installation with excellent post installation hand over and follow up.

Alison Taylor

Jack initially came to service our boiler, he was friendly, professional and did a great job. We wanted our heating system flushed, so asked for a quote. This was sent the same day and our system was flushed through on the day we wanted, all ready for the winter months by Jack & Harry. Again a friendly professional manner, and our home left clean & tidy.

David Stemp

We just moved in to our new property on Friday, we reported the taps not working in the kitchen on Thursday, Ryan came around, identified the problem, and changed the taps. Great, professional service, Ryan was very friendly and professional. Thank you.

Jess Slater

Ryan completed a boiler replacement and a Landlords certificate for us on our rental property. He was friendly and efficient, and we really appreciate the effort he went to, to ensure we were happy with the installation and that we understood how to use it before he left. Thanks

4.9/5 Google reviews. See More

What Areas Do We Serve?

Based in Banbury, our team are well-positioned to install boilers in areas such as:

Bicester
Warwick
Brackley
Banbury
Leamington Spa
Moreton-in-Marsh
Stratford-upon-Avon
Daventry

Your New Boiler Is Just a Phone Call Away!

If you’re ready for your next boiler, our OFTEC-registered professionals are ready to get the job done. Get in touch with us today on 01295 597 961 for a FREE no-obligation consultation and bespoke quote.

FAQs

How much does a new boiler installation cost?

Costs vary by boiler type, brand, and complexity of the installation. As a general guide, a straight swap for a like-for-like domestic boiler is generally more affordable than a full system change. For the most accurate pricing, please contact us, and we’ll survey your home.

How long will the installation take?

Most like-for-like domestic replacements take between 1 to 3 days. More complex jobs (new system design, flue works, or tank relocation) take longer - we’ll give a clear time estimate in the written quote.

Do you remove my old boiler?

Yes, we safely decommission and remove old boilers and dispose of them responsibly. Any waste is managed in line with current regulations.

Will my new boiler be more efficient?

Most modern boilers are more efficient than models older than 10-15 years. Upgrading can reduce fuel usage and lower bills - we’ll explain expected efficiency improvements with your quote.

What qualifications do your team have?

Our team maintain a high level of professionalism throughout each boiler installation, demonstrated by our accreditations and qualifications, including:

Gas Safe (Reg no. 536684)
OFTEC
CIPHE
Worcester Bosch Accredited Installer

Do you offer finance or payment plans?

Thanks to our finance partner, Novuna Personal Finance, we offer the ability to spread the costs of your new boiler and installation over a repayment term that best suits you. Finance is offered subject to status and a credit check.

For more information, please get in touch with us.