System Boiler Installation
System Boiler Installation
System boiler installation for larger Barnet and North London homes — high, stable hot water flow to several bathrooms at once from a sealed cylinder.
System Boiler Installation in North London, done properly the first time
Once a property has two or more bathrooms in regular use, a combi starts to struggle and a system boiler with an unvented cylinder becomes the sensible answer. That covers a lot of the larger houses around Hampstead, Highgate, Totteridge and the EN4 side of Barnet.
A system boiler keeps the pump and expansion vessel inside the unit and feeds a sealed cylinder, so you get mains-pressure hot water at every outlet simultaneously — no loft tanks, no gravity-fed weakness upstairs.
Cylinder sizing matters as much as boiler output. We size it against how many people use the property and when, so you are not reheating all evening or running out mid-shower.
Why choose Norvex for system boiler installation
Premium workmanship, fixed pricing and a service experience built around you.
Strong simultaneous flow to multiple bathrooms
No cold water storage tanks in the loft
Cylinder sized to real household demand
G3-qualified for unvented work
Manufacturer warranty registered
12-month workmanship guarantee
A calm, four-step process
From the first call to a tidy handover — no surprises, no jargon, no mess.
Get in touch
Call us or send a quick enquiry — we'll respond within an hour during working hours.
Free survey & quote
An engineer assesses the work and gives you a clear, written, fixed-price quote.
Book a date that suits you
Choose a slot that fits around your schedule — we work evenings and weekends.
Work completed cleanly
Uniformed engineers carry out the work, tidy up fully and walk you through everything before leaving.
Get a fast quote for system boiler installation
Free, no-obligation quotes. Most calls answered within 30 seconds.
Why choose Norvex
Gas Safe Registered
Every engineer registered & ID-checked
Manufacturer Accredited
Worcester, Vaillant, Ideal & more
Same-week Appointments
Most jobs booked within 48 hours
5★ Reviewed
Hundreds of verified reviews
Your questions, answered
System boiler or combi?
Two or more bathrooms in simultaneous use, or a large family, points to a system boiler and cylinder. One bathroom and good mains pressure points to a combi.
Do I need an unvented cylinder?
Not necessarily, but it is the usual pairing because it gives mains-pressure hot water everywhere. Unvented work must be carried out by a G3-qualified engineer, which we are.
Where does the cylinder go?
Usually the airing cupboard or a loft space with the required discharge route. We check the discharge pipe run at survey, because that decides what is possible.
Are your system boiler installation engineers Gas Safe registered?
Yes — every engineer working on system boiler installation in North London is Gas Safe registered, manufacturer-trained and fully insured to £5m public liability. We'll show our ID on arrival.
Which areas of North London do you cover for system boiler installation?
We provide system boiler installation across the whole of North London, including Barnet, Finchley, Muswell Hill, Hampstead, Highgate, Enfield and the surrounding N, NW and EN postcodes. Local engineers means short call-out times wherever you are.
What our customers say
"Quoted, fitted and gone in a day. New boiler, no fuss, new smart thermostat thrown in. Best tradespeople we've had in years."
Sarah, Barnet
"Emergency call at 9pm — engineer on site by 10:30. Sorted the leak that night. Highly recommend."
Michael, Finchley
"Total bathroom renovation. Beautiful job, on budget, finished early. We'll be using Norvex for the kitchen next."
Priya, Highgate
Ready when you are
Book system boiler installation with a Gas Safe engineer — fixed pricing, same-week appointments.
Book system boiler installation today
Free quotes, fixed pricing and Gas Safe engineers across Barnet, Finchley, Muswell Hill, Hampstead and the rest of North London.