New Boilers &
Heating Services
For London
Trusted heating specialists serving Enfield, Barnet, Finchley, Potters Bar and St Albans – same-day availability on many repairs.
Brands we install
OUR SERVICES
Everything your home heating needs. One company.
New Boilers
New boiler installed – often the next working day
Vaillant, Glow-worm and Worcester Bosch supplied and fitted. Like-for-like combi swaps or full system conversions. Includes Honeywell thermostat as standard and full manufacturer’s warranty. Finance options available.
Boiler Servicing
Annual boiler servicing
from £90 + VAT
All makes and models. The single most effective way to keep your heating running safely – and maintains your warranty.
Boiler Repairs
Same-day repairs –
most fixed in one visit
Our engineers carry a full stock of parts on every call-out. Most repairs are completed without a return trip.
Central Heating
Full installations
& system upgrades
Our engineers assess your property properly before recommending the most effective solution for your needs and budget.
Local Plumbing
Emergency & general
plumbing repairs
Alongside heating services, Thermwise handles emergency and general plumbing repairs across North London.
HOW IT WORKS
Simple from start to finish.
Online Quote
Tell us about your property. We provide a quote quickly – no jargon, no pressure.
Survey
In-person or virtual surveys for more complex jobs to assess your needs properly.
Installation
We arrive on time, keep you informed and complete the work to a high standard.
Aftercare
We’re here for servicing, care plans and future heating needs – it doesn’t end at sign-off.
THERMWISE PRICE PROMISE
We price fairly.
Every time.
Transparent approach to every job. We’ll always explain what we’re doing, why, and how – so you’re never left in the dark.
Fixed Price, No Surprises
The price we quote is the price you pay. No hidden extras, no last-minute additions on the day.
Quality You Can Rely On
Every installation is managed through quality checks and full compliance documentation.
Finance Available
Upgrading your home shouldn’t put pressure on your finances. 0% APR options available – ask us.
Ongoing Support
Our relationship doesn’t end when the job is done. We’re here for aftercare, servicing and future needs.
Why Choose Thermwise
Standards that don’t slip.
We’re a family-run team and we put everything into making sure you’re left completely satisfied – every single time.
Family Business, Personal Service
Every job treated as if it’s our own home. We put everything into your satisfaction.
Fast Response Times
We know heating problems can’t always wait. Same-day availability on many repairs – help is never far away.
Friendly, Approachable Team
We genuinely enjoy helping our customers. Every interaction should feel comfortable and straightforward – never pushy.
Full Transparency, Always
We always explain what we’re going to do, how and why – so you understand every aspect of the work in your home.
£90
Annual service from + VAT
4.2★
Google rating
Same Day
Availability on many repairs – won’t be left in a cold home
AREAS WE COVER
Serving North London
& Hertfordshire.
Our engineers regularly work across the following areas. Not sure if we cover you? Get in touch and we’ll let you know.
Frequently asked questions
Good questions. Straight answers.
Can’t find what you’re looking for? Give us a call – we’re always happy to help.
Ready to Get Started?
Ready for a warmer,
more efficient home?
Whether you need a new boiler, repair or service – Thermwise is here. Book your free survey or request a quote today.
