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


Adelphi Mayfair
Aldwych Millbank
Bayswater Paddington
Belgravia Paddington Green
Charing Cross Pimlico
Chinatown Portman Estate
Covent Garden Queen’s Park
Devil’s Acre Soho
Fitzrovia St James’s
Holborn St John’s Wood
Hyde Park Strand
Kensal Town Temple
Knightsbridge Victoria
Lisson Grove Westbourne
Maida Vale Westbourne Green
Marylebone Westminster

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


 Balham Roehampton
Battersea Southfields
Earlsfield Streatham Park
Furzedown Tooting
Nine Elms Wandsworth
Putney Wimbledon 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


 Bankside Honor Oak
 Bermondsey Kennington
 Borough Newington
 Camberwell Nunhead
 Crystal Palace Peckham
 Denmark Hill Peckham Rye
 Deptford Rotherhithe
 Dulwich Southwark
 Dulwich Village Surrey Quays
 East Dulwich Sydenham
 Elephant and Castle Walworth
Forest Hill West Dulwich
 Herne Hill

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

Kensington and Chelsea

Brompton North Kensington
Chelsea Notting Hill
Earl’s Court South Kensington
Holland Park Kensington High Street
Ladbroke Grove West Brompton
Kensington World’s End

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


Angel Islington
Archway Kings Cross
Barnsbury Lower Holloway
Canonbury Mildmay
Clerkenwell Nag’s Head
Farringdon Newington Green
Finsbury Pentonville
Finsbury Park St Luke’s
Highbury Tufnell Park
Highgate Upper Holloway

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

Hammersmith and Fulham

Fulham Shepherd’s Bush
Hammersmith Walham Green
Old Oak Common West Kensington
Parsons Green White City
Sands End

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


Bethnal Green Lea Bridge
Dalston London Fields
De Beauvoir Town Lower Clapton
Finsbury Park, London Manor House
Hackney Central Newington Green
Hackney Downs Shacklewell
Hackney Marshes Shoreditch
Hackney Wick South Hackney
Haggerston Stamford Hill
Homerton Stoke Newington
Hoxton Upper Clapton

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

City of London

Aldgate Hatton Garden
Bank High Holborn
Barbican Lincoln’s Inn Fields
Billingsgate Liverpool Street
Blackfriars Lombard Street
Broadgate Mansion House
Bunhill Fields Monument
Cannon Street Old Broad Street
Chancery Lane Shoreditch
Clerkenwell St Bartholomew’s Hospital
Cornhill St Luke’s
Farringdon St Mary Axe
Fenchurch Street St Paul’s
Fetter Lane Temple
Gracechurch Street Tower Hill

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


Belsize Park Highgate
Bloomsbury Holborn
Camden Town Kentish Town
Chalk Farm Kings Cross
Covent Garden Primrose Hill
Dartmouth Park St. Giles
Fitzrovia St Pancras
Fortune Green Somers Town
Frognal South Hampstead
Gospel Oak Swiss Cottage
Hampstead Tufnell 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.