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Frequently asked questions

How does BOXT work?

BOXT puts you in control. We let you choose your new boiler and installation date online, without the hassle of salespeople.

Instead of sending a salesperson out to bother you at home, we get you to answer a few simple questions online. It's easy to do on your phone.

You'll be able to compare brands and prices to choose your new boiler. Then you choose a convenient date to have one of our expert Gas Safe engineers install it for you.

  1. Find
    First you'll answer a few straightforward questions. What kind of boiler you have, the type of fuel it runs on, how big your home is, that sort of thing.
  2. Choose
    We'll recommend a set of boiler packages and let you choose The One. You'll be able to compare brands and prices to help make up your mind.
  3. Pay
    Our packages start at just £11.61 per month. You can also pay it all upfront using our secure online payments system. It's up to you.
  4. Receive
    Your BOXT will be delivered by courier on the morning of your installation day. Your engineer will arrive bright and early, too, between 7.30 and 8.30am.
    On the odd occasion we need to deliver your BOXT a day or so before installation. But don't worry, we always check with you to make sure it's convenient.
  5. Install
    Then, your certified Gas Safe installer will arrive to get it all set up. Our installers are qualified, experienced professionals. They're a friendly lot, too.
Find a boiler
Should I repair or replace my old boiler?

Replace. A repair can sometimes be as expensive as a brand new boiler. And you could easily have more problems with a repaired boiler further down the line.

A brand new boiler is usually more efficient and more reliable.

Your new boiler will be covered by warranty too – so if it breaks, the manufacturer will repair it with no extra charge.

We can provide a brand new A-rated boiler from £1,795, or from £11.61 a month, including VAT and Gas Safe installation.

Find a boiler
How much does a new boiler cost?

The costs for:

  • a brand new A-rated boiler,
  • a brand new flue,
  • all the right fixtures, fittings and safety attachments,
  • installation from a Gas Safe Registered engineer

would traditionally set you back between £2,500 and £4,000.

BOXT can offer you exactly the same A-rated boiler, flue, attachments and Gas Safe registered installation from £1,795, or from £11.61 a month, including VAT.

Find a boiler
Are BOXT installers trained and Gas Safe registered?

Yes. All of our installers are professional, experienced central heating engineers with Gas Safe certification.

Will I get boiler cover from BOXT?

Yes. Every new BOXT boiler comes with a manufacturer's guarantee of up to 10 years.

You don't need to do anything to activate your guarantee – we'll register your boiler with the manufacturer as part of our installation service.

Will boiler installation make a mess?

No. Our engineers will make sure that surfaces are protected and the area they're working on is always clean and tidy.

Do I need to do anything before my installer arrives?


Before your installer arrives, clear away any clutter around the boiler – especially valuables and things that break easily – and make sure the boiler is easy to access.

In some cases we need to deliver your BOXT a day or so before your installation (after checking with you, of course). Keep the package in a dry and secure place.

What is a Combi boiler?

Combi boilers, or Combination boilers, are the most popular type of boiler in the UK. They're used by 74% of households.

They're named ‘Combination' because they combine a high-efficiency water heater and a central heating boiler all in one package.

Combi boilers are efficient and cost less in heating bills.

That's because:

  • They only heat water when you need it, rather than storing hot water up
  • They're small and compact, as they don't use an external hot water tank
Find a boiler
What are Thermostatic Radiator Valves?

Thermostatic Radiator Valves – or TRVs – are controls for your radiators. They regulate how much hot water flows into the radiator so you can adjust its temperature.

TRVs also let you turn some radiators off (for example, in a room you're not using) without turning off the heating.

Why do I need TRVs?

The Government recommends that every household has Thermostatic Radiator Valves because they:

  • save you money on heating bills
  • use less energy
  • are better for the environment

But they're not mandatory.

What's the cost?

Each valve costs £35. If you want TRVs installed please give us a call on 0800 193 7777 after you check out and we can add them to your order.

Find a boiler
What is a flue?

A flue is a pipe, like a chimney, that carries waste from the boiler outside. You can see your flue exit (the part of the flue that comes out of your house) on the wall or roof of your home.

Flues can either be square or round in shape.

If the flue is less than two metres off the ground, or underneath a carport or shelter, it'll be covered by a guard. This looks like a piece of wire mesh covering the end of the flue.

When you buy a boiler from BOXT, we'll also supply and fit a brand new flue for you, along with all the safety attachments you need.

When is my installation date booked?
When you’ve paid in full or signed your finance agreement.

If you haven’t completed payment or agreed a finance plan 24 hours after choosing your installation date, it will become available to other customers.

If you’ve chosen next-day installation

Finish payment or sign your finance agreement before 3.30pm to guarantee your slot.

Will BOXT do a Chemical Flush?

Yes. We do a Chemical Flush – a hot flush and dose.

We'll put a cleaner into your system, flushing it around using the boiler. Any debris will be caught by the magnetic filter we install for free. We'll keep going until it's clean.

Once the system is up to temperature, it's drained and refilled with clean water. Finally, an inhibitor is added to the water to protect the system.

Will BOXT do a Powerflush?

No. After years of experience, we've found that using a Powerflush machine on an older system simply causes more problems.

Instead, we carry out a Chemical Flush – which is a highly effective way to keep your system protected, approved by our manufacturer partners.

What is the filter?

A magnetic filter, which we'll provide and install for free. It's fitted to the boiler on the return flow. This catches any debris from your system and stops it getting into your new boiler.

What is a Plume Management Kit?

A Plume Management Kit directs 'products of combustion' away from openings or vents into your property. This keeps you and your family safe.

Help with Find a boiler: can I delete my answers?

Yes. Tap the button below to go back to the start of Find a boiler and delete your existing answers. You won’t be able to undo this.

Reset Find a boiler

More frequently asked questions

Understanding boilers

I use solar power. Can I buy from BOXT?

Yes. Your new BOXT boiler will work with solar power in exactly the same way as your old boiler. Simply choose a solar-compatible boiler. If your heating runs entirely on electricity generated by solar, give us a ring on 0800 193 7777

What is a System boiler?

System boilers heat your radiators directly and store hot water in a storage cylinder. They're usually installed in an airing cupboard or garage. They heat a large volume of water and then store it until you use it. This means they're less efficient than Combi boilers, which heat water only when you use it.

What is a Standard boiler?

Standard boilers are also known as Conventional or Regular boilers. They store hot water in a storage cylinder, like System boilers, but they're fed by a separate cold water tank – usually in the loft. There's another separate tank, called a ‘feed and expansion cistern', usually in the loft too. Standard boilers are the largest type of boiler.

What is an ErP label?

The Erp – Energy related products – Label tells you how efficiently a boiler (or another appliance like a fridge or a washing machine) uses energy. It's designed to help you choose the right appliance and pay less in energy bills. The label rates products from A+++ to G.

A+++ is the most efficient boiler you can get.

It also tells you how loud the appliance is in decibels and how much heat it outputs in kilowatts.

All of the boilers BOXT sells are rated A for efficiency.

Can you install if I live above the second floor?

No, in most cases. There's a huge cost for hiring specialist equipment that lets our engineers reach the outside of your home, and we don't want to have to pass that cost on to you. If you want to talk through your options, ring us on 0800 193 7777 or email customerservice@boxt.co.uk

About BOXT

I'm a landlord. Can I buy from BOXT?

Yes. To buy boilers for more than one property, find and check out each boiler separately. You'll need to answer questions about the number of bedrooms, baths and separate showers in your properties, as well as the shape of the flue and its position on the outside of the house. If you're not sure, it's best to get your tenants to take pictures of their current boiler and flue before you begin.

What is Divido?

Divido is a service that powers our secure payments.

You can either choose to pay for your BOXT monthly in instalments or all at once.

If you pay monthly

You'll be taken to Divido's website. There you'll make an application for credit to cover the total cost of your new boiler. Then you pay back the amount month by month, including any interest.

This credit is provided by Shawbrook Bank.

Once you're accepted for credit, you'll be taken back to BOXT.co.uk to finish your order.

Finance applicants not accepted at the advertised rate of 9.9% may be eligible for finance at a higher interest rate. If this is the case you will be presented an alternative finance offer which you can review carefully and decide whether or not to proceed with the higher interest rate terms described.

If you pay all at once

You'll be taken to Divido's website. There you can pay using a Visa Debit or Credit, MasterCard or American Express card.

Once you've paid, you'll be taken back to BOXT.co.uk to finish your order.

Who are the lenders for BOXT's pay monthly plans?
Shawbrook Bank Limited

Authorised by the Prudential Regulation Authority and regulated by the Prudential Regulation Authority, and the Financial Conduct Authority.

Business registered address:
Lutea House,
Warley Hill Business Park,
Great Warley,
Brentwood, Essex,
CM13 3BE

Omni Capital Retail Finance Limited

Authorised and regulated by the Financial Conduct Authority.

Business registered address:
10 Norwich Street,
How does pay monthly work?

If you choose to pay for your BOXT in monthly instalments, you'll apply for credit through our payment partner Divido.

At checkout, just select Pay monthly.

You'll be taken to Divido's website. There you'll make an application for credit to cover the total cost of your new boiler. Then you pay back the amount month by month, including any interest.

This credit is provided by Shawbrook Bank.

Once you're accepted for credit, you'll be taken back to BOXT.co.uk to finish your order.

If I choose a monthly agreement, can I pay it back early?

Yes, just contact your credit provider, Shawbrook Bank or Omni Capital, who will offer you a settlement amount for early repayment.

If I choose a monthly agreement, do I have to pay a deposit?

No. But you can if you want to. You can put down up to 50% of the total price as a deposit, and pay off the rest over a 5 or 10 year term at an APR of 9.90%. You'll be able to adjust the amount of deposit you pay when you choose Pay monthly at checkout.

Can I split my payment over two cards?

No. At the moment, our payment system does not let you split a payment. However, if you choose Pay monthly at checkout, you can put a 50% deposit on a card and pay off the rest over a 5 or 10 year term, at an APR of 9.90%.

Delivery & Installation

Will BOXT take away my old boiler?

We will always take away your old boiler unless you tell us not to or if it contains asbestos. If you don't want us to remove your old boiler, let your installer know on the day of installation.

If your boiler contains asbestos, we will be happy to discuss organising a specialist contractor to remove it and the additional costs that will be involved. Unsure if your boiler contains asbestos? Please feel free to call us on 0800 193 7777 where we can check the make and model against the register of boilers that contain asbestos.

Will BOXT recycle my old boiler?

Yes. Many parts of your old boiler can be recycled. BOXT supports recycling as much of your old boiler as possible.

Will BOXT recycle my old Back Boiler Unit (BBU)?

No. We will cap off and decomission your old BBU but leave it where it is. If possible, we'll try our best to keep your fire working.

Will my free Honeywell Smart Thermostat need to be plugged in?

Yes. It communicates with the boiler wirelessly, but it will need to be plugged in to a power socket.

Can I change my mind before installation?

Yes – as long as you tell us you've changed your mind as soon as possible. Ring us on 0800 193 7777 or email customerservice@boxt.co.uk

After your boiler is installed

How do I keep my warranty valid?

Make sure you have your boiler serviced at least once a year.

Your manufacturer will be able to service it for you, or we're happy to. The cost of a service from BOXT is £80 + VAT.

What does my warranty cover?

Your warranty covers everything that BOXT has supplied and installed for you. That usually means the boiler, flue and any attachments.

Do I need to activate my warranty?

No. We'll register you with the manufacturer as soon as you've checked out your BOXT. So you'll be covered by warranty from the moment your boiler is up and running.

Is my filter covered by warranty?

Yes – your filter is covered by a warranty backed by the filter manufacturer. The length of the filter warranty will always match or exceed the length of the boiler warranty.

Is my Honeywell Smart Thermostat covered by warranty?

Yes. If you're buying a Combi boiler from BOXT, your free Honeywell Smart Thermostat is covered by a 2-year warranty backed by the manufacturer, Honeywell.

What do I do if my boiler breaks down?

Don't panic. Get in touch with your boiler manufacturer and they'll send an engineer out as soon as possible. All BOXT boilers come with a manufacturer's guarantee of up to 10 years.

If your boiler is made by Worcester Bosch call 0330 123 9559

Open Monday to Friday 7am to 8pm, Saturday 8am to 5pm, Sunday 9am to 12pm

If your boiler is made by Baxi call 0344 871 1545

Open Monday to Friday 8am to 6pm, Saturday to Sunday 8.30am to 2pm, Bank Holidays (including Christmas and New Year) 8.30am to 2pm

If your boiler is made by Vokèra call 0127 486 6100

Open Monday to Friday 8.15am to 5pm, Saturday 8am to 12pm

Who carries out my annual service?

Either your boiler's manufacturer – Worcester Bosch, Baxi or Vokèra – or BOXT will be able to carry out your annual service, to keep your boiler running smoothly and make sure your warranty is still valid.

To schedule your annual service, contact your manufacturer. If you'd like BOXT to carry out your annual service, we're happy to. Just give us a ring on 0800 193 7777 or email customerservice@boxt.co.uk. We charge £80 + VAT for a service.