Worcester Bosch
Most popular4000 from £1,650 · 8000 Life from £2,395 fitted
- Up to 10-year guarantee
- Which? Best Buy for 16 consecutive years
- Best for: 1–2 bathroom homes wanting premium reliability
Supply & Fit From £1,650
Boiler Installation Leeds from £1,650 (Supplied & Fitted)
New combi boiler installed in your Leeds home in 24–48 hours, from £1,650 fitted. Worcester Bosch, Vaillant, Ideal, Baxi and Navien — fitted by our senior Gas Safe engineer Tamrez and his in-house team, not subcontractors. Up to 10-year manufacturer warranty, magnetic filter, wireless thermostat, CO alarm and system flush included as standard.
Same-day quotes · No call-out fee · Cash and card only, no finance · Quote valid 30 days
Leeds postcodes we cover for boiler installation
Mr Reactive is a West Yorkshire heating company headquartered in Bradford. We're upfront about this: we don't run a separate Leeds high-street branch, and we won't list a Leeds address we don't actually work from. What we do have is a team of in-house, Gas Safe registered engineers who install new boilers across every Leeds postcode — from LS1 in the city centre out to LS28. Bradford sits around 20 minutes from Leeds on the A647 and M621, so your free survey is usually booked within 24 hours of your enquiry and the installation follows within 24–48 hours.
We install new combi, system and conventional boilers throughout Headingley, Hyde Park, Burley, Woodhouse, Meanwood, Chapel Allerton, Chapeltown, Moortown, Alwoodley, Roundhay, Oakwood, Adel, Shadwell, Horsforth, Cookridge, Rawdon, Yeadon, Guiseley, Pudsey, Farsley, Calverley, Bramley, Kirkstall, Armley, Beeston, Holbeck, Hunslet, Harehills, Morley, Rothwell, Garforth, Cross Gates, Seacroft, Wetherby and Boston Spa. Our engineers know the Leeds housing stock — the Victorian back-to-back and through terraces of Harehills, Beeston and Holbeck, the red-brick student HMOs of Headingley, Hyde Park and Burley, the 1930s semis of Moortown, Oakwood and Adel, the period stone houses around Horsforth, and the new-build estates of east Leeds. Whichever LS postcode you live in, your installation is carried out by the same in-house team — never a subcontractor.
We also build new boiler installation pages for the rest of West Yorkshire — see our new boiler installation hub or our Boiler Installation Bradford page.
Our West Yorkshire Head Office
- Head OfficeLegend House, 173 Sunbridge Road, Bradford, BD1 2HB
- Leeds service areaAll LS postcodes — LS1 to LS28
- Phone01274 752 852
- Gas Safe Reg.598381
- Companies House10847439
- VATGB273672579
- Trading since2017
What's included in our £1,650 fixed price
Our fixed-price boiler installation in Leeds includes everything most Leeds homeowners need for a like-for-like combi replacement. No upsells, no surprise add-ons on the day:
- The new boiler — your choice of Worcester Bosch 4000, Ideal Logic Plus, Baxi 200 or equivalent (24–30kW combi)
- Up to 10-year manufacturer warranty — registered on your behalf
- Magnetic system filter — fitted to protect the new boiler from sludge
- Wireless room thermostat — programmable, replaces your existing controls
- Carbon monoxide alarm — fitted and tested
- Manual system flush — cleans your existing radiators and pipework
- New flue — supplied and fitted to manufacturer spec
- Commissioning — Benchmark certificate completed
- Gas Safety record — issued on the day
- Removal and safe disposal of your old boiler
System change-overs (back boiler to combi, or combi to system), boiler relocations, and full power-flushes are quoted separately. Your free survey will tell you exactly what's needed — no surprises on installation day.
Leeds boiler installation cost guide 2026
Boiler installation prices in Leeds typically range from £1,650 to £3,200 fully fitted by a Gas Safe registered engineer, with the average Leeds home paying around £2,300. A straightforward like-for-like combi swap usually falls between £1,350 and £2,200; larger system conversions run higher. Mr Reactive's fixed price starts at £1,650 for a like-for-like combi swap — at the bottom of the Leeds range and significantly below national online brokers and British Gas. Here's how the cost breaks down by boiler type and by property size.
| Installation type | Mr Reactive price | Leeds average | What's included |
|---|---|---|---|
| Combi boiler swap (like-for-like) | from £1,650 | £1,650 – £2,600 | New combi, flue, filter, thermostat, CO alarm, flush |
| New system boiler | from £2,100 | £2,200 – £3,800 | System boiler, cylinder retained, pipework, controls |
| New conventional boiler | from £2,100 | £2,200 – £3,800 | Heat-only boiler, tank retained |
| Electric combi boiler | from £1,950 | £1,900 – £2,900 | Electric combi, no flue, full system flush |
| Back boiler → combi conversion | from £2,600 | £2,800 – £4,800 | Includes hot water cylinder removal |
Typical new boiler cost in Leeds by property size
| Property size | Typical Leeds installation cost | Mr Reactive fixed price from |
|---|---|---|
| 1–2 bed flat or small terrace (combi swap) | £1,650 – £2,300 | £1,650 |
| 3-bed semi or terrace (combi swap) | £1,800 – £2,700 | £1,650 |
| 4-bed house (combi or system boiler) | £2,400 – £3,600 | £2,100 |
| Large home / full system conversion | £3,000 – £5,000+ | £2,600 |
Things that can increase your Leeds boiler installation cost
- Relocating the boiler to a different room — adds £300–£600 (e.g. kitchen to loft, or moving to garage)
- Changing system type — conventional to combi conversion adds £500–£1,000 for pipework and removing tanks
- Power flush (vs manual flush) — adds £300–£700 if your radiators are heavily sludged
- Gas pipe upgrade — adds £200–£500 if your existing 15mm pipe needs upgrading to 22mm
- Asbestos flue removal — adds £200–£400 if your old flue contains asbestos (common in pre-2000 Leeds homes)
- Premium boiler upgrade — Worcester Bosch 8000 Life or Vaillant ecoTEC Plus adds £400–£900
Every Leeds home is different. Our free survey gives you a fixed written quote with everything listed — no on-the-day surprises and no "while we're here" upsells.
No finance, no interest — you pay once
Some Leeds installers headline a low "from £X a month" finance figure — because finance earns them commission. The catch: typical boiler finance runs 9.9–11.9% APR and can add £1,000 or more to the real cost over the term. Mr Reactive is cash and card only — you pay once, own the boiler outright, with no credit check and no interest. For most Leeds homeowners that works out hundreds of pounds cheaper than a monthly plan.
Mr Reactive vs British Gas vs BOXT vs a typical Leeds installer — boiler installation compared
Leeds homeowners typically choose between four routes for a new boiler: a national broker like BOXT or iHeat, British Gas, a local Leeds heating firm like Mr Reactive, or a one-man-band gas engineer found on Checkatrade or MyBuilder. Here's how those routes compare on price, transparency and accountability.
| Mr Reactive | British Gas | BOXT / iHeat | Typical Leeds installer | |
|---|---|---|---|---|
| Like-for-like Worcester combi (fitted) | £1,650 | £2,964 (surveyed) | £1,790–£2,300 | Often £2,000+ · rarely published |
| Fixed price published online | Yes — £1,650 fixed | No — survey only | Yes — instant online | Rarely |
| Gas Safe registered engineer | In-house Tamrez + team | Yes — often subcontracted | Subcontracted network | Usually in-house |
| Named engineer | Tamrez (senior) | No | Whoever's free | Sometimes |
| Same/next-day quotes | Same day | 1–2 weeks wait | Online instant | Varies |
| Verified Google reviews | 5.0 ★ · 800+ | 3.6 ★ (Trustpilot, national) | 4.8 ★ · 22k (national) | Varies — often few shown |
| On-page FAQ + full structured data | Yes | Limited | Limited | Rarely |
| No call-out fee | Yes | No | n/a | Usually |
| Warranty registered on your behalf | Yes | Yes | Yes | Usually |
Most Leeds boiler installers are capable, Gas Safe registered engineers — the difference is rarely the workmanship, it's the transparency. Across the Leeds firms ranking on Google for "boiler installation", the pattern is consistent: no fixed price published, no on-page FAQ answering what buyers actually ask, and far fewer reviews on show. Mr Reactive publishes a fixed £1,650 price, answers the real questions below in full, and backs it with 800+ verified 5.0★ Google reviews — so you can compare properly before anyone sets foot in your home.
Boilers we install in Leeds
We install only boilers from manufacturers with strong long-term reliability records and fast parts availability across Leeds and West Yorkshire. We do not install Ferroli, Biasi, Ariston or Heatline — brands that consistently rate poorly in independent reliability surveys and where parts can be slow to source.
Vaillant
ecoTEC Pro from £1,890 · ecoTEC Plus from £2,290 fitted
- Up to 10-year warranty
- German engineering, very quiet operation
- Best for: homeowners prioritising long-term reliability
Ideal
Logic+ from £1,650 · Vogue Max from £2,150 fitted
- Up to 12-year warranty (Vogue Max)
- Made in Hull, UK — easy parts availability
- Best for: value-conscious homeowners and landlords
Baxi
200 from £1,650 · 800 from £1,995 fitted
- Up to 10-year warranty
- Solid mid-range, simple controls
- Best for: simple, reliable swap-outs
Navien
NCB300 from £1,950 · NCB500 from £2,395 fitted
- Up to 12-year warranty
- Compact for cupboard installs
- Best for: small kitchens, flats, properties with limited space
Accredited installer for the brands we fit in Leeds
Mr Reactive is a manufacturer-accredited installer for Worcester Bosch, Vaillant, Ideal, Baxi, Vokèra and Potterton. That means your new boiler is fitted to manufacturer specification — and the extended manufacturer warranty is registered and valid.
Boiler sizing — why a bigger boiler isn't always better
One of the most common installation mistakes in Leeds homes is oversizing the boiler. Homeowners (and some installers) assume that a 35kW or 40kW combi means "more hot water" — but for a typical 3-bedroom Leeds terrace or semi with 8–10 radiators, that's wildly oversized.
An oversized boiler fires at full power, overheats the radiators in minutes, switches off, and starts again — this short cycling stops the boiler ever reaching its high-efficiency condensing mode. The result: noticeably higher gas bills than a correctly sized boiler, and premature wear on the pump and valves.
An undersized boiler is the opposite problem. In a Leeds winter, when mains water enters the property at 4–6°C, an undersized combi can't heat it fast enough — leaving you with lukewarm showers and dropping pressure when two taps run at once.
Tamrez carries out a proper heat-loss calculation on every Leeds installation. We measure your mains water flow rate (a typical Leeds home needs 12–15 litres per minute for a comfortable shower), count and measure your radiators, factor in your property's age, insulation and number of bathrooms, then specify a boiler that modulates correctly for your actual demand.
For most 2-bedroom Leeds terraces — including the through-terraces of Headingley and Burley — that's a 24–28kW combi. For 3–4 bedroom semis in Moortown, Roundhay or Adel with one bathroom, 28–30kW. For homes with two bathrooms or high simultaneous demand, we'll usually recommend a system boiler with a hot water cylinder rather than a larger combi — because a 40kW combi still can't beat the simple physics of a stored-water cylinder for multi-bathroom use.
How a Mr Reactive boiler installation works in Leeds
1
Free home survey (same day or next day)
Tamrez or one of our senior engineers visits your Leeds home, usually within 24 hours of your enquiry. We measure your mains pressure and flow rate, count your radiators, check your existing flue route, gas pipe size and meter capacity, and inspect for asbestos. The survey is free and takes around 45 minutes.
2
Fixed written quote (within 24 hours)
You'll get a written quote by email with the exact boiler model, exact price, exact installation date, and a full list of what's included — no "from" prices, no asterisks. Quote valid 30 days. No deposit taken.
3
Installation day (1 working day for like-for-like)
Our team arrives between 8:00 and 8:30am with the new boiler, all parts, dust sheets and a temporary heater so your home isn't cold while we work. A typical like-for-like Worcester combi swap in a Leeds home takes 6–8 hours. We remove your old boiler, fit the new flue, install the magnetic filter, wireless thermostat and CO alarm, flush the system and commission the boiler.
4
Same-day commissioning and certification
Before we leave, the boiler is commissioned to manufacturer spec, gas-tested, and we issue your Gas Safety record, Benchmark commissioning certificate, and register your manufacturer warranty (up to 10 or 12 years depending on brand) on your behalf.
5
12 months of aftercare included
For 12 months after installation, any boiler-related callout is covered free of charge. After that, we offer a low-cost annual service plan from £10/month to keep your warranty valid for the full 10+ years.
Leeds landlord boiler installation — HMO licensing, Selective Licensing and MEES
Leeds has one of the largest private rented sectors in the country, and if you let property here your boiler decisions carry real legal weight. Any House in Multiple Occupation (HMO) with five or more occupants requires a mandatory HMO licence, and a condition of every licence is a working heating system with a valid CP12 Gas Safety record at all times — that covers a large share of the student housing across Headingley, Hyde Park, Burley and Woodhouse.
Leeds City Council has also operated Selective Licensing in designated inner-city areas, such as parts of Beeston and Harehills, which apply similar property and safety standards to ordinary rented homes. Separately, the national Minimum Energy Efficiency Standard (MEES) already bars letting a property rated EPC F or G, and the government has signalled the minimum will rise to band C later this decade. A modern A-rated combi boiler typically adds several points to an EPC score — often the difference between a D-rated and a C-rated rental.
For Leeds landlords, we offer:
- New boiler installation + CP12 + EPC-friendly controls as a single bundle from £1,710 (£1,650 install + £60 CP12)
- Direct invoicing to letting agents or property management companies
- Tenant liaison — we'll arrange installation directly with your tenant, send before/after photos, and email the CP12 and Benchmark certificate to you the same day
- Boiler care plans from £10/month for landlords — covering the boiler, system, controls and annual CP12
What our Leeds customers say
Real-time, verified Google reviews from homeowners and landlords across Leeds and the wider West Yorkshire area.
Boiler installation Leeds — frequently asked questions
How much does a new boiler installation cost in Leeds?
A new boiler installation in Leeds typically costs between £1,650 and £3,200 fully fitted, with the average Leeds home paying around £2,300. A like-for-like combi swap is usually £1,350–£2,200. Mr Reactive's fixed price starts at £1,650, including the boiler, flue, magnetic filter, wireless thermostat, CO alarm, system flush and removal of your old boiler.
How much does British Gas charge to install a boiler in Leeds?
British Gas's online quote for a like-for-like Worcester Bosch combi is typically around £2,578, rising to roughly £2,964 after a home survey. Mr Reactive's equivalent Leeds price is £1,650 — saving Leeds homeowners £900–£1,300 for the same boiler and manufacturer warranty.
Why is BOXT so cheap compared to British Gas?
BOXT keeps prices low by operating as an online aggregator that subcontracts installations to a national network of independent Gas Safe engineers. There is no local Leeds office, no named engineer, and aftercare runs through a national call centre. Local Leeds specialists like Mr Reactive offer similar prices with direct accountability.
How much is a new boiler for a 3 or 4-bedroom house in Leeds?
For a 3-bedroom Leeds semi or terrace, a like-for-like combi swap is typically £1,800–£2,700 fully fitted. A 4-bedroom home, especially with two bathrooms, often suits a system boiler and runs £2,400–£3,600. The final price depends on boiler type, brand and whether any pipework or relocation is needed. Mr Reactive gives a fixed written quote after a free survey — combi swaps from £1,650.
What's the best month to replace a boiler in Leeds?
May to August is the cheapest and fastest time to install a new boiler. Heating engineers are quieter through summer, you can typically book within 48 hours, and some installers offer summer discounts. Avoid October to January if you can — winter demand pushes prices up and waiting times to 2–3 weeks.
Is it worth replacing a 15-year-old boiler in Leeds?
Almost always yes. A 15-year-old boiler typically runs at 70–80% efficiency, and older units lower still, while a modern A-rated condensing boiler runs at 92–94%. A Leeds household spending around £1,400 a year on gas can save £300–£400 a year with a new boiler — paying back the £1,650 installation in about 4–5 years, with far fewer breakdowns.
Is there a government scheme to replace old boilers?
The main scheme is the government's ECO4 (Energy Company Obligation), which can fund a replacement boiler for homeowners on certain income-related benefits. The Boiler Upgrade Scheme funds heat pumps rather than gas boilers. Eligibility is limited — Mr Reactive runs an ECO4 funding service and can check if you qualify; if you don't, our £1,650 fixed price is designed to be the most affordable straightforward route.
Which combi boilers should I avoid?
Independent reliability surveys consistently flag Ferroli, Biasi, Ariston and Heatline among the worst-performing combi boilers in the UK — higher breakdown rates, slower customer service and harder parts availability. We install Worcester Bosch, Vaillant, Ideal, Baxi and Navien only.
Do I need a 25kW or 30kW combi boiler?
It depends on your hot-water demand, not the size of the house. A 24–28kW combi suits most 2–3 bedroom Leeds homes with one bathroom. A 30–35kW combi is for homes with higher simultaneous hot-water demand. Bigger is not better — an oversized combi short-cycles and costs more to run. We carry out a heat-loss and flow-rate calculation on every survey to size it correctly.
How long does it take to install a new boiler in Leeds?
A like-for-like combi swap takes 1 working day (6–8 hours). Changing boiler type, such as a back boiler to a combi, takes 2–3 days. Relocating the boiler to a different room adds half a day. We start at 8:00–8:30am and you'll have heating and hot water by early evening.
Do you provide a Gas Safety Certificate after installation?
Yes. Every Mr Reactive installation includes a Gas Safety record (CP12), a Benchmark commissioning certificate completed and signed in your boiler manual, and manufacturer warranty registration on your behalf. All three are emailed to you the same day and the paper copies left at the property.
What's included in your £1,650 fixed price?
The boiler, flue, magnetic system filter, wireless room thermostat, CO alarm, manual system flush, removal of your old boiler, commissioning, Benchmark certificate, Gas Safety record, and up to 10-year manufacturer warranty registered on your behalf. No on-the-day extras, no asterisks.