HUGE boiler savings!

Compare obligation-free quotes now!

  • All boiler models quoted
  • Trusted local boiler engineers
  • Latest June deals

New & Replacement

Save on new boiler installs!

  • Upgrades and new installs
  • Expert advice included
Get Free Quotes

Repairs & Servicing

Boiler maintenance for less!

  • Emergency repair work
  • Annual service savings
Get Free Quotes

BAXI 800 818 Gas Boiler

MPN: 7728645 EAN: 5033313035655
BAXI 800 818 Gas Boiler prices and quotes
Output (Kw)
18
Warranty (years)
10
Erp
Heating Efficiency
A Heat
Water
Average Price
Updated: 01/06/21
£915.14 inc. VAT
Thinking of installing this boiler?
ManufacturerBAXI
Model800 818
TypeGas Boiler
Sub TypeSystem Boiler
ColourWhite
Width (mm)390
Height (mm)700
Depth (mm)285
Weight (kg)27.7
Output (Kilowatts)18
ErP Space Heating EfficiencyA
Noise Level (Decibels)48
MountingWall
FuelNatural Gas

Product Description


If you’re looking for a boiler that has an output rating of 18 kW, Baxi 818 is a product fit for purpose. It is a condensing system gas boiler that delivers the highest levels of efficiency at all output levels compared to similar boilers.

The Baxi 818 boiler is a highly efficient condensing system gas boiler that has been developed for small to medium sized homes.

Although the gas boiler is a relatively recent addition to our range, Baxi have spent decades perfecting its design and efficiency, making it a truly effective and reliable heating system. The 818 is particularly impressive in terms of fuel efficiency and condensing performance. Specially designed for optimal performance, and offering many advanced features; the 818 gas condensing boiler is your ideal solution for home heating.

Frequently Asked Questions


Will I save on my heating bills?

The BAXI 818 boiler is the latest in the range of boilers that help to save you money. The compact 818 is one of the most sought-after boilers on the market today. It is suitable for a wide range of domestic heating jobs, and provides exceptional energy efficiency, which will help you to save money on your fuel bills.

Do I need a system, regular or combi boiler?

A system boiler has a number of benefits over a traditional boiler. Firstly, many of the important parts, such as the pump and expansion vessel, are built into the system boiler itself. Secondly, a system boiler offers a quick response time to changes in demand, making it ideal for changing needs within your home.

The boiler supplies hot water to your radiators, while the hot water to the cylinder is drawn off by a pump in the event your system needs heating quickly. System boilers offer an ample storage space, meaning you can save on energy costs while having a constant supply of hot water for all your household’s needs.

Any additional information?

The most powerful compact boiler in the Baxi range can be installed easily into a standard wall or floor cavity and will provide you with 'whole house' heating and hot water, helping you to keep your energy bills down.

The Baxi 818 comes with a package of accessories that includes everything you need to get your boiler up and running. The Baxi 818 gives you plenty of control with your smartphone or tablet. It has a ADEY Micro2 magnetic system filter that provides industry leading protection, all pipes fit behind the unit, front service access to all components, brass hydraulics block and more.

You can rely on the Baxi 818 to provide warmth in your home whilst helping you save energy and money. It comes with an OpenTherm interface, making it perfect for installation in new or existing homes.

What warranty length do Baxi offer?

Your boiler is going to be around for a long time. The last thing you want to worry about is its reliability, so finding a tried-and-tested model is a good place to start. But it’s also worth looking for some reassurance that the manufacturer stands by their products, with a minimum warranty period. You don’t have to look far – Baxi 818 boilers are supplied with a 7-year warranty as standard.

Is the Baxi 818 efficient?

The Baxi 818 is definitely a highly efficient unit within the heating system market. It features a seasonal efficiency rating of 93% and ErP A-rating which makes this model one of the most efficient units on the UK heating market. The 818 features a range of advanced technology including an extended range domestic programmer (XRDP) as well as a high efficiency burner, flame failure device, sound proofing and an automatic restart function to protect your boiler against cold weather.

Are there any other options?

If you’re looking to install a new boiler there are several options available. The boiler you choose will depend on your heating and hot water needs. If you choose a standard system boiler, then it will have a separate heating and hot water tank.

A combi boiler is an efficient and reliable solution to meet your hot water and heating requirements in your home or property. Combis are available in a wide range of sizes varying from 18 kW all the way to 35kW.

Is the output rating sufficient?

If you’re a homeowner in the UK who has always wanted to replace their old boiler (and save a lot of money in the process), but are unsure as to which model will be able to provide enough hot water and heating for your property, you should look for an 18 kW model. This rating is enough for regular-sized properties that won’t need to use excessive amounts of power.

Is it discreet? Where can it be installed?

This compact unit is the perfect answer to those hard-to-reach areas. It is then fitted with minimal fuss into a standard 290mm deep cupboard, neatly wall-mounted and out of sight. Why not install a boiler that is designed to blend seamlessly into your home? One that will be barely noticeable so as not to disturb the aesthetics of your house.

Other BAXI boilers similar to the 800 818

Model kW ErP Warranty Price (inc. VAT)
BAXI 200 224 24kW 24
A Heat
A Water
3 £585.45
BAXI 200 228 28kW 28
A Heat
A Water
3 £599.66
BAXI 400 415 15kW 15
A Heat
Water
5 £706.53
BAXI 400 428 28kW 28
A Heat
A Water
5 £706.53
BAXI 600 613 13kW 13
A Heat
Water
7 £1241.4
BAXI 600 616 16kW 16
A Heat
Water
7 £881.24
BAXI 600 619 19kW 19
A Heat
Water
7 £941.6
BAXI 600 625 25kW 25
A Heat
Water
7 £1000.95
BAXI 600 636 36kW 36
A Heat
A Water
7 £1030.06
BAXI 800 825 25
A Heat
A Water
10 £890.99

More System Boilers to consider

Model kW ErP Warranty Price (inc. VAT)
Ferroli Bluehelix Tech 24C 20
A Heat
A Water
10 £690.06
Ferroli Bluehelix Tech 28C 24
A Heat
A Water
10 £740.84
Ferroli Bluehelix Tech 34C 30
A Heat
A Water
10 £810.29
Glow-worm Energy 18kW 18
A Heat
Water
2 £854.28
Glow-worm Energy 30kW 30
A Heat
A Water
2 £885.26
Glow-worm Energy 35kW 35
A Heat
A Water
5 £1696.02
Heatline Capriz2 28kW 28
A Heat
A Water
2 £542.02
Heatline Capriz2 24kW 24
A Heat
A Water
2 £505.81
Ideal Exclusive 2 35kW 35
A Heat
A Water
5 £687.25
Ideal Logic+ Heat H15 15
A Heat
Water
7 £875.9

News Discover the latest boiler offers this June, get some free quotes!