We saved customers an average of £801 on a
boiler installation*, compared to British Gas

*Based on 50 surveys completed through independent research June 2015–February 2016, with a like-for-like boiler make/model, including any VAT, discounts and offers. Some variation in optional extras and warranty – see below.

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The following apply to all quotes:

1. On warranty arrangements

  • British Gas include 1 year central heating care on all installations
  • The AA include a 7-year manufacturer boiler warranty (subject to the fitting of a magnetic filter on Worcester boilers), and 1 year full system aftercare on all installations

2. Quotes have been rounded to the nearest £100 to preserve customer anonymity

No.Boiler make and modelOptionsThe AA (£'000)British Gas (£'000)The AA price difference (£'s)
1Worcester 15Ri£2.4k£3.3k-£933
Extras included on both quotesMagnetic filter upgrade
Extras specific to either quoteBritish Gas: upgraded remote heating controls; powerflush water treatment
2Worcester 30Cdi£3.4k£4.3k-£938
Extras included (both)Upgraded magnetic filter; flue modifications, other building work
Extras specific to either quoteBritish Gas: upgraded remote heating controls; powerflush water treatment
3Worcester 18Ri£2.9k£3.4k-£512
Extras included (both)Upgraded magnetic filter; water treatment, new flue, new control valve
Extras specific to either quoteBritish Gas: upgraded remote heating controls
4Worcester 30Si£3.1k£3.0k+£161
Extras included (both)Magnetic filter upgrade and scale reducer
Extras specific to either quoteBritish Gas: upgraded remote heating controls
The AA: upgraded controls; MagnaCleanse water treatment
5Vaillant Pro 28£2.6k£3.0k-£432
Extras included (both)Upgraded magnetic filter
Extras specific to either quoteBritish Gas: upgraded remote heating controls; powerflush water treatment
The AA: upgraded controls
6Worcester 15Ri£2.4k£2.8k-£438
Extras included (both)Flue modifications
Extras specific to either quoteThe AA: upgraded magnetic filter
7Vaillant Pro 24£2.2k£2.4k-£168
Extras included (both)Flue installation
Extras specific to either quoteBritish Gas: upgraded remote heating controls
The AA: upgraded magnetic filter
8Worcester 36/34Cdi£3.4k(36Cdi)£4.5k(34Cdi)-£1,068
Extras included (both)Upgraded magnetic filter; conversion to combi
Extras specific to either quoteBritish Gas: upgraded remote heating controls
9Worcester 25i£2.6k£3.2k-£617
Extras included (both)Flue modifications
Extras specific to either quoteThe AA: upgraded magnetic filter
10Worcester 34Cdi£4.2k£5.3k-£1,073
Extras included (both)Water treatment
Extras specific to either quoteThe AA: upgraded magnetic filter; upgraded wireless controls
British Gas: 5 thermostatic radiator valves; upgraded remote heating controls
11Worcester 12Ri£2.6k£3.4k-£795
Extras included (both)Upgrades magnetic filter; water treatment
Extras specific to either quoteBritish Gas: upgraded remote heating controls; new thermostat
12Worcester 40Cdi£3.6k£4.5k-£887
Extras included (both)Water treatment; new pump and valves
Extras specific to either quoteBritish Gas: upgraded magnetic filter
13Worcester 18Ri£3.1k£3.6k-£579
Extras included (both)None
Extras specific to either quoteThe AA: upgraded magnetic filter; MagnaCleanse water treatment; upgraded flue
14Worcester 25Si£2.5k£2.7k-£266
Extras included (both)None
Extras specific to either quoteThe AA: upgraded magnetic filter; upgraded programmer; scale reducer
British Gas: upgraded remote heating control
15Worcester 18Ri£3.2k£4.0k-£842
Extras included (both)Upgraded magnetic filter; water treatment, new pump; upgraded remote heating controls
Extras specific to either quoteBritish Gas: scale reducer
16Vaillant EcoTec Pro 24£2.6k£3.0k-£390
Extras included (both)Upgraded water treatment
Extras specific to either quoteThe AA: upgraded magnetic filter; scale reducer
17Worcester 12Ri£1.8k£2.7k-£861
Extras included (both)None
Extras specific to either quoteNone
18Worcester 15Ri£2.0k£3.3k-£1,294
Extras included (both)Upgraded remote heating controls
Extras specific to either quoteThe AA: upgraded magnetic filter British Gas: powerflush water treatment
19Worcester 18Ri£2.1k£3.2k-£1,086
Extras included (both)Upgraded magnetic filter
Extras specific to either quoteBritish Gas: upgraded powerflush water treatment
20Worcester 30i£2.5k£3.8k-£1,279
Extras included (both)None
Extras specific to either quoteThe AA: upgraded magnetic filter
British Gas: upgraded remote heating controls; powerflush water treatment; 4 thermostatic radiator valves; scale reducer
21Worcester 30Si£2.5k£2.9k-£357
Extras included (both)None
Extras specific to either quoteBritish Gas: upgraded controls; upgraded magnetic filter
22Worcester 24Ri£2.8k£5.5k-£2,656
Extras included (both)Upgraded filter (to fully pumped)
Extras specific to either quoteBritish Gas: powerflush water treatment; upgraded remote heating controls; 4 thermostatic radiator valves; new header tank
23Worcester 24Ri£2.4k£3.3k-£867
Extras included (both)Upgraded magnetic filter
Extras specific to either quoteBritish Gas: upgraded remote heating controls; powerflush water treatment
24Worcester 30Si£3.3k£5.3k-£2,023
Extras included (both)Conversion to a combi boiler
Extras specific to either quoteThe AA: upgraded magnetic filter
British Gas: upgraded remote heating controls; powerflush water treatment; flue modifications
25Worcester 18Ri£2.0k£3.6k-£1,649
Extras included (both)Upgraded magnetic filter; upgraded remote heating controls
Extras specific to either quoteBritish Gas: new pump
26Worcester 38Cdi£3.8k£5.6k-£1,771
Extras included (both)Conversion to combi boiler; flue modifications
Extras specific to either quoteThe AA: upgraded magnetic filter upgrade
British Gas: upgraded remote heating control; powerflush water treatment
27Worcester 30i£2.8k£3.5k-£740
Extras included (both)Upgraded magnetic filter; flue modifications; upgraded remote heating controls
Extras specific to either quoteNone
28Worcester 38Cdi classic£3,193£3,093+£100
Extras included (both)Upgraded remote heating controls
Extras specific to either quoteThe AA: upgraded magnetic filter; upgraded gas supply
British Gas: upgraded powerflush water treatment
29Worcester 18Ri£2.1k£3.6k-£1,475
Extras included (both)Filter
Extras specific to either quoteBritish Gas: upgraded remote heating controls; powerflush water treatment; new thermostats
30Worcester 30Si£2.6k£3.5k-£903
Extras included (both)Conversion to combi boiler; modifications to flue and gas supply
Extras specific to either quoteThe AA: filter
British Gas: upgraded remote heating controls
31Worcester 30i£3.4k£5.4k-£1,998
Extras included (both)Conversion to combi boiler; building and glue modifications
Extras specific to either quoteThe AA: upgraded magnetic filter
British Gas: upgraded remote heating controls; upgraded powerflush water treatment
32Worcester 30i £3.3k£4.6k-£1,349
Extras included (both)Conversion to combi boiler, upgraded remote heating controls
Extras specific to either quoteThe AA: upgraded magnetic filter
British Gas – powerflush water treatment
33Vaillant 637 Plus£3.0k£3.4k-£374
Extras included (both)Flue modifications
Extras specific to either quoteThe AA: upgraded magnetic filter
British Gas: new controls and programmer
34Vaillant 832 Plus£2.7k£2.8k-£116
Extras included (both)Upgraded magnetic filter; flue installaion
Extras specific to either quoteNone
35Worcester 30i/25i£3.1k (30i)£3.5k (25i)-£413
Extras included (both)Electrical upgrade work
Extras specific to either quoteThe AA: upgraded magnetic filter; upgraded controls; scale reducer; upgraded gas supply; upgraded MagnaCleanse water treatment
British Gas: upgraded remote heating controls
36Worcester 15Ri£2.3k£2.7k-£419
Extras included (both)Upgraded water treatment
Extras specific to either quoteThe AA: upgraded magnetic filter
37Worcester 30Si£3.6k£5.0k-£1,332
Extras included (both)Flue modifications; upgraded scale reducer
Extras specific to either quoteThe AA: upgraded Magnacleanse water treatment; upgraded magnetic filter; upgraded controls
38Worcester 30Ri£4.0k£5.0k-£1,035
Extras included (both)Upgraded water treatment; upgraded system to 'fully pumped'; upgraded gas supply
Extras specific to either quoteThe AA: upgraded magnetic filter; flue modifications
British Gas: upgraded scale reducer
39Worcester 25i£2.3k£2.6k-£294
Extras included (both)None
Extras specific to either quoteThe AA: upgraded magnetic filter
40Vaillant 615 £2.1k£3.4k-£1,271
Extras included (both)None
Extras specific to either quoteThe AA: upgraded magnetic filter
British Gas: upgraded remote heating controls; upgraded powerflush water treatment
41Worcester 30i£2.4k£2.3k+£39
Extras included (both)None
Extras specific to either quoteThe AA: upgraded magnetic filter
42Worcester 25i£3.1k£2.9k+£186
Extras included (both)Upgraded gas supply; flue installation
Extras specific to either quoteThe AA: upgraded MagnaCleanse water treatment
British Gas: new controls and upgraded magnetic filter
43Worcester 30Si£4.3k£4.9k-£586
Extras included (both)Conversion to combi and associated building modifications
Extras specific to either quoteThe AA: upgraded magnetic filter; upgraded scale-reducing filter; extra radiators in 3 rooms, new controls, thermostatic radiator controls throughout; upgraded MagnaCleanse water treatment
British Gas: upgraded remote heating controls
44Vaillant 832 Plus 31kw£3.2k£3.6-£501
Extras included (both)Remote heating controls upgrade; magnetic filter upgrade; flue upgrade
Extras specific to either quoteBritish Gas: powerflush water treatment
45Worcester 36/34 Cdi£4.3k£5.2k-£894
Extras included (both)Flue upgrade
Extras specific to either quoteThe AA: upgraded magnetic filter
British Gas: includes new controls
46Vaillant 832 Ecotec£3.0k£3.1-£146
Extras included (both)Magnetic filter upgrade; flue upgrade
Extras specific to either quoteNone
47Worcester 25i£2.5k£2.6k-£59
Extras included (both)Remote heating controls upgrade
Extras specific to either quoteNone
48Worcester 24i£2.7k£3.2k-£438
Extras included (both)Remote heating controls upgrade; powerflush water treatment
Extras specific to either quoteThe AA: magnetic filter upgrade
49Worcester 25i£3.4k£4.7k-£1261
Extras included (both)Magnetic filter upgrade; powerflush water treatment
Extras specific to either quoteBritish Gas: remote heating controls upgrade; x6 thermostatic valves
The AA: scale reducer upgrade; new controls
50Worcester 30Si£4.3k£5.4k-£1144
Extras included (both)Remote heating controls upgrade; flue upgrade
Extras specific to either quoteThe AA: new condensate pump

*Based on 50 surveys completed through independent research June 2015–February 2016, with a like-for-like boiler make/model, including any discounts and offers. Some variation in optional extras and warranty as above.

Automobile Association Developments Limited. Registered office: Fanum House, Basing View, Basingstoke RG21 4EA. Registered in England and Wales number 01878835.

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