Gas Safe registered heating engineers

Boiler installation in London

New boilers and full replacements — combi, system and regular — with fixed-price quotes, tidy certified fitting and up to 10-year guarantees, by Gas Safe registered engineers across North and West London.

Get a free quote

Call 07709 247215

Overview

Combi, system & regular boilers explained

Choosing the right boiler depends on your home's size, hot-water demand and existing setup. We'll assess everything at survey and recommend the option that suits your household and budget — never overselling, always explaining the trade-offs in plain English.

Signs you may need a new boiler

✓Rising energy bills

✓Frequent breakdowns or repairs

✓A boiler more than 10–15 years old

✓Leaks or visible corrosion

✓Parts becoming hard to source

✓Uneven or slow heating

Why choose Nexas

Professional installation, done properly

Expert fitting

Clean, certified installation with tidy pipework and full commissioning.

Fixed-price quotes

A clear written price after survey, with no hidden extras.

Up to 10-yr guarantees

Manufacturer-backed warranties plus our own workmanship standards.

FAQs

Boiler installation in London — common questions

How much does a new boiler cost?

It depends on the boiler type, brand and your home's setup. After a quick survey we provide a fixed written quote with no obligation.

Which boiler brands do you install?

We regularly install Worcester Bosch, Vaillant, Viessmann and Intergas, and help you choose the right one for your home and budget.

How long does a boiler installation take?

Many straightforward replacements are completed in a day; more complex conversions may take longer. We'll confirm timings before we start.

Get your free, no-obligation quote

Tell us what you need and we'll get back to you quickly with honest advice and clear pricing.

Call us

07709 247215

Request a free quote

Ready for a new boiler?

Get a free, fixed-price installation quote from local Gas Safe engineers.

Get a free quote

Call 07709 247215