London Boiler Guide

Are you looking to upgrade your existing boiler? Need to install a unit that will provide you with reliable service for years to come? Let us help you choose the right kind of boiler for your needs. Call FD Plumbing & Heating on 020 7060 4770 to discuss your needs. We serve London and surrounding areas.

Choosing the right boiler

All boilers are pretty much the same, right? Well, if you’ve started doing some research into the different makes, models, sizes and outputs then you will have quickly found that this is not the case. But don’t worry, we are here to help!

Whatever level of budget you’re working with, it’s important to choose a boiler that’s suited to your plumbing setup, the size of your property, and your heating and hot water needs.

If you give us a call, we’ll get one of our Gas Safe registered experts to come over and meet you. They can advise on exactly what type and specification of boiler would suit your home best, and then we can help you to choose a model that fits the bill and works with your budget.

Types of boiler

Your new boiler will almost always be a ‘condensing’ boiler. These boilers covert more gas into useable heat and cut the amount of Carbon Dioxide emitted by up to 25%. They should also save you several hundred pounds a year on heating costs.

There are three basic types of condensing boiler: Regular (also known as Traditional, Conventional or Heat Only), System and Combination (or Combi for short).

Which type is best for you will depend on your home and needs, but we’ll be happy to give you advice on this. Don’t worry! You won’t need to know anything technical yourself.

We’ll look at the pattern of your heating and hot water usage throughout the day, and at whether you’ve converted, or may in the future convert, your loft (as a Regular boiler needs some loft space for tanks, while System and Combi boilers don’t).

In making the decision we’ll discuss with you where you plan to locate the boiler and so where the flue will be, as condensing boilers give off a cloud of steam (or ‘plume’) into the outside air, and you won’t want to annoy either yourself or your neighbours by having it billowing past a window.

Combi Boilers

Combination boilers are really economical on space, which is one of the reasons they’re so popular. As well as powering your heating, a Combi boiler heats hot water for you as you need it. This means you don’t have to have a big storage cylinder taking up room in a cupboard. And whereas conventional boilers need to have a cold water tank in the loft to draw from, a Combi boiler draws directly from your mains water supply so you don’t need the tank.

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Regular Boilers

If you’re replacing an old boiler in a family house it’s likely that this will be a Regular boiler system. This means you’ll have a boiler; a large cold water storage tank and a feed and expansion tank (also known as an F&E tank) in the loft; a large hot water cylinder in a cupboard; a timer control unit fixed to a wall somewhere; and a room thermostat. The choice between a Regular boiler and a System boiler installation will come down to the type of property and the layout of your system – some are more suited to one type over the other, and one of our heating experts will be able to guide you.

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System boilers

A System boiler is similar to a Regular boiler, but it doesn’t need a feed and expansion tank in the loft. This saves you some loft space (which is good if your loft is actually converted into living space). The boilers themselves tend to be a bit bigger than Regular boilers, due to having the expansion vessel, filling loop, pressure relief valve and pump inside the case.Generally, if you live in a flat it’s likely that a Combi boiler will be most suitable. If you’re in a larger, family house with more than one bathroom then it will usually be either a Regular or System boiler.back to top

Our services extend to the following Boroughs and Postcodes


BelgraviaPaddington Green
Charing CrossPimlico
ChinatownPortman Estate
Covent GardenQueen’s Park
Devil’s AcreSoho
FitzroviaSt James’s
HolbornSt John’s Wood
Hyde ParkStrand
Kensal TownTemple
Lisson GroveWestbourne
Maida ValeWestbourne Green

EC4, SW1, SW7, W1, W2, W9, W10, W11, WC2, NW1, NW6, NW8


EarlsfieldStreatham Park
Nine ElmsWandsworth
PutneyWimbledon Common
Putney Vale

SW4, SW8, SW11, SW12, SW15, SW16, SW17, SW18, SW19, SW95

Tower Hamlets

 Bethnal Green Isle of Dogs
 Blackwall Leamouth
 Bow Limehouse
 Bow Common Mile End
 Bromley-by-Bow Millwall
 Cambridge Heath Old Ford
 Canary Wharf Poplar
 Coldharbour Ratcliff
 Cubitt Town St George in the East
 Docklands Spitalfields
 East Smithfield Stepney
 Fish Island Wapping
 Globe Town Whitechapel
 Hackney Wick

EC2, EC3, E1, E2, E3, E9, E14, E15, E20


 BanksideHonor Oak
 Crystal PalacePeckham
 Denmark HillPeckham Rye
 Dulwich VillageSurrey Quays
 East DulwichSydenham
 Elephant and CastleWalworth
Forest HillWest Dulwich
 Herne Hill

SE1, SE4, SE5, SE8, SE11, SE15, SE16, SE17, SE19, SE21, SE22, SE23, SE24, SE26

Kensington and Chelsea

BromptonNorth Kensington
ChelseaNotting Hill
Earl’s CourtSouth Kensington
Holland ParkKensington High Street
Ladbroke GroveWest Brompton
KensingtonWorld’s End

SW1, SW3, SW5, SW7, SW10, W2, W8, W10, W11, W14, NW10


ArchwayKings Cross
BarnsburyLower Holloway
ClerkenwellNag’s Head
FarringdonNewington Green
Finsbury ParkSt Luke’s
HighburyTufnell Park
HighgateUpper Holloway

N1, N4, N5, N6, N7, N8, N16, N19, EC1, EC2, WC1, NW5

Hammersmith and Fulham

FulhamShepherd’s Bush
HammersmithWalham Green
Old Oak CommonWest Kensington
Parsons GreenWhite City
Sands End

W3, W4, W6, W10, W11, W12, W14, NW10, SW6, SW10


Bethnal GreenLea Bridge
DalstonLondon Fields
De Beauvoir TownLower Clapton
Finsbury Park, LondonManor House
Hackney CentralNewington Green
Hackney DownsShacklewell
Hackney MarshesShoreditch
Hackney WickSouth Hackney
HaggerstonStamford Hill
HomertonStoke Newington
HoxtonUpper Clapton

EC1, EC2, E1, E2, E5, E8, E9, E10, E15, E20, N1, N4, N5, N15, N16.

City of London

AldgateHatton Garden
BankHigh Holborn
BarbicanLincoln’s Inn Fields
BillingsgateLiverpool Street
BlackfriarsLombard Street
BroadgateMansion House
Bunhill FieldsMonument
Cannon StreetOld Broad Street
Chancery LaneShoreditch
ClerkenwellSt Bartholomew’s Hospital
CornhillSt Luke’s
FarringdonSt Mary Axe
Fenchurch StreetSt Paul’s
Fetter LaneTemple
Gracechurch StreetTower Hill

EC1, EC2, EC3, EC4, WC1, WC2, E1


Belsize ParkHighgate
Camden TownKentish Town
Chalk FarmKings Cross
Covent GardenPrimrose Hill
Dartmouth ParkSt. Giles
FitzroviaSt Pancras
Fortune GreenSomers Town
FrognalSouth Hampstead
Gospel OakSwiss Cottage
HampsteadTufnell Park
Haverstock West End
West Hampstead

N1, N6, N7, N19, NW1, NW2, NW3, NW5, NW6, NW8, EC1, WC1, WC2, W1, W9



If you need help deciding which boiler would suit your needs Call FD Plumbing & Heating on 020 7060 4770 in London today. We have Boiler experts ready to assist with any technical enquiry you may have.