Baxi 800 Boiler Range

Combi Boilers ~ System boilers

How it Works

Choose Your Brand

Find out about each of our featured boiler manufacturers before you complete our easy to use boiler pricing tool. You’ll also get a smart thermostat and system filter to control and protect your new boiler.

Answer Questions

We’ll ask you a few easy questions about your current set up to make sure we specify the correct boiler replacement for you. This is where you’ll find out the cost of a new boiler.

Select Your Package

Choose the boiler that fits your requirements which might be brand, budget, warranty period or some other consideration. You’ll then get your fixed price quotation and we’ll offer you different ways to pay.

Pick a Date

Once you’ve received your fixed boiler price including installation you can arrange for your installer to call carry out a pre-installation survey. Don’t worry though the fixed price you see is the fixed price you pay.

Secure Your Fixed Price including:

A Boiler For Every Occasion

10 Year Manufacturer's Warranty


The Baxi 800 range of boilers is approved by the Energy Saving Trust and is available as a combi or a system boiler.

It fits easily into a standard kitchen cupboard and comes complete with a 10 Year Manufacturer Warranty.


10 year warranty as standard

Compact cupboard fit

Range of flueing options

Comes with Adey Micro2 System Filter

Manufactured in the UK by Baxi Boilers

Compatible with Smart Controls

What's Included?

It’s not just a new boiler you get when you order your boiler replacement from PlumbAgent.

We’ll include everything you need to make sure your new boiler is well installed and well protected ensuring long and trouble free service. 

Lets have a look at what else you get for your money.

Honeywell Controls

The T6 range of thermostats from Honeywell ensures that you’re getting the best value for what you spend on your central heating. 


 The T6 Range includes wireless and SMART versions designed to keep your home warm and welcoming at the times you want.

And with the T6R Wireless Smart Programmable thermostat you can control your heating from anywhere (even the other side of the world) using the Honeywell Home App.

Your PlumbAgent boiler installer will make sure it’s all working properly and you’re happy using it before he leaves.

System Protection

Your PlumbAgent installer will install a new central heating system filter as part of his installation and commissioning routines.

We install filters made by Fernox and Adey when we install your new boiler as we are confident in the protection that both brands provide.

You can get a FIXED PRICE by clicking the button below.

Central Heating Filters

We’ll chemically flush your existing central heating system to remove unwanted system debris and magnetite sludge

This is really only half the story though as it’s vital that we install a new central heating filter to protect your new boiler moving forward.

The Fernox Tf1 Filter and the Adey Magnaclean will protect your new central heating boiler and combined with an annual boiler service will ensure that your boiler manufacturer warranty remains valid.



Flexible Payments?

You never know when you’re going to need to find out the cost of a new boiler.

Recent research suggests that boiler replacement is the least planned major household purchase with less than 20% of home owners actually setting a date to change their boiler.

No wonder then that it always comes as a major shock when we realise we are with out heating and hot water and worse still we have to find the cost of a boiler replacement.

 PlumbAgent understands that sometimes you may need some help to finance your boiler replacement so can make it possible for you to spread the cost.

You can borrow between £500 and £15,000, pay no deposit and repay it over 3, 5, 8 or 10 years.

Complete our boiler pricing tool by hitting the button below and find out how much your boiler replacement will cost.

Payments Example

The table below shows the monthly repayment with no deposit and the total amount repayable for a loan of £2,500
Loan Amount £2,5003 Years5 years8 Years10 Years
Interest rate and Representative APR9.9% (fixed)9.9% (fixed)9.9% (fixed)9.9% (fixed)
Monthly repayment£80.06£52.48£37.25£32.32
Total amount repayable over the period£2,882£3,149£3,576£3,878

Representative Example

Fixed price inc. installationOptional depositLoan amountTerm of loanMonthly repaymentTotal amount payable (including deposit)Rate of interestRepresentative APR
£2,500Nil£2,5005 years£52.48£3,1499.9% (fixed)9.9%

Next Steps

If you wish to apply for a loan the quotation confirmation we send on email contains a link to the loan application. If your loan application is approved we will agree an installation date to suit you and your first loan repayment will be taken by direct debit one month after your boiler installation.

Begin the process by getting your boiler replacement fixed price by clicking the button below.

Spread the Cost

Here are some of the key features of the loan

  • Choose to repay the loan over 3, 5, 8 or 10 years
  • Available interest rates start at 9.9% APR although you may be offered a higher interest rate depending on your financial circumstances.
  • You can pay a deposit if you wish or you can borrow the whole amount.
  • You can overpay or make early repayments at any time. If you overpay you will reduce future interest and the length of the loan will be shortened.
  • You will need to decide if the loan is right for you. PlumbAgent nor its installing engineer can give you any financial advice.
  • The table below shows the monthly repayment and the total amount repayable for a loan of £2,500 with no deposit.

PlumbAgent (part of Agency Supplies Ltd 11084252) FRN no. 914426 is not a lender or credit broker but acts as an introducer to finance. We are an appointed introducer to Phoenix Financial Consultants Ltd and all loan applications are subject to status, affordability, vulnerability and credit check. Phoenix Financial Consultants Ltd (Company no. 7436334) is authorised and regulated by the Financial Conduct Authority (FRN no. 539195 and acts as a credit broker introducing loans from a select panel of lenders. Finance can only be used for boiler and central heating equipment installations.

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