New floor-standing oil boiler in a farmhouse utility room

New oil boilers · OFTEC registered

Oil boiler replacement in Andover

A new oil boiler, inside or outside, fitted by an OFTEC registered engineer. Priced after a quick chat or a photo.

Send an oil enquiry 07774 319391

5.0 on Google from 63 reviews · Gas Safe and OFTEC registered

How much does a new oil boiler cost in Andover?

Oil boilers are priced individually, because the boiler position, flue, oil supply and tank all affect the cost. Send the form or a photo of your current boiler and Dexter gives you a fixed price after a quick chat or a short visit.

Call 07774 319391 or WhatsApp Dexter.

Price

Fixed price after a quick look

Fixed price after a quick look. Oil jobs vary more than gas, so Dexter prices them from a photo, a call or a short visit.

What affects the price

Indoor or outdoor boiler
The flue position and type
Whether the oil line or filter need changing
Converting to a combi or keeping a cylinder
The condition of the tank

How long it takes. Most oil boiler replacements take one to two days. Dexter confirms the timing with your price.

About this job

A large part of rural Hampshire and Wiltshire runs on heating oil, and the online boiler companies rarely take oil jobs on. Dexter is OFTEC registered for oil, so replacing an old oil boiler is everyday work for DWM, whether the boiler sits in a utility room, a garage or outside against the wall.

A new condensing oil boiler uses noticeably less oil than an old non-condensing one. Dexter replaces the boiler, sets up the flue to suit the position, fits a new oil filter and checks the oil line back to the tank, then commissions the boiler with a combustion analyser so it runs cleanly from day one.

He also looks at the tank while he is there and tells you plainly if anything needs attention. If you are weighing up oil against LPG, he can talk through both.

What a new oil boiler installation covers

Removal of your old oil boiler
A new condensing oil boiler, inside or outside
Flue set up to suit the position
New oil filter and the oil line checked to the tank
System flushed and protected with inhibitor
Commissioning with a combustion analyser
Manufacturer warranty registered for you
The tank looked at and any concerns explained

Signs your oil boiler needs replacing

Frequent lockouts or the burner failing to light
A smell of oil, smoke or soot around the boiler
The boiler is old and non-condensing, and oil use keeps rising
Parts are hard to find or repairs keep coming back
Rust or leaks from the boiler casing

How it works

No call centre and no sales visit. The person you speak to is the person who does the job.

1Send the form or a photo
Tell Dexter what you have now and send a photo of the boiler and tank if you can.
2A fixed price after a quick look
Dexter rings you back, checks anything he needs to see and gives you a fixed price.
3Fitted and commissioned
The old boiler is removed, the new one fitted and commissioned, and the warranty registered for you.

Dexter's own photos

Real jobs, photographed by Dexter. No stock pictures.

Floor-standing oil boiler with copper pipework

What customers say

5.0 on Google from 63 reviews. Read them all on Google

★★★★★

Dexter fitted our replacement boiler last week and I must congratulate him on the way he carried out the procedure. His manner and quality of workmanship could not be faulted. Regards Bill Malham

Bill MalhamGoogle review, November 2023

★★★★★
Dexter came and swapped our old boiler for a new Ideal one. Friendly, professional and worked hard over three days. Tidied everything up afterwards and we would definitely use his services again. Thanks very much.
Alex ReidGoogle review, August 2023
★★★★★
We have had an exceptional experience with Dexter who showed professional and kindness to our very senior Dad, excellent advice and clear options given and all at a very reasonable price! We whole heartedly recommend Dexter for any job large or small!
Ray WestGoogle review, September 2025
★★★★★
Dexter was the complete professional - quick survey, quotation and work completed within a week !! Friendly, approachable, with a high standard of Work throughout (including the final tidy up !!) Highly Recommended.
Roger ParrishGoogle review, January 2025

Questions

New oil boilers:
your questions

Not sure what boiler you have? Send Dexter a photo and he will tell you.

WhatsApp Dexter

Are you OFTEC registered?

Yes. Dexter is OFTEC registered for oil work and Gas Safe registered for gas and LPG.

Can I get an oil boiler price online?

Not yet. Oil boilers vary too much to price automatically, so use the form and Dexter prices it after a quick look.

Do you replace oil tanks?

Dexter checks the tank on the visit and tells you if anything needs doing. Mention the tank on the form if you already have concerns.

Can an outdoor oil boiler be replaced?

Yes. Outdoor oil boilers are common in the villages around Andover and Dexter replaces them regularly.

Ask Dexter about new oil boilers

Send the short form and Dexter rings you back himself. Or call 07774 319391 or send a WhatsApp.

Gas Safe and OFTEC registered · 5.0 on Google from 63 reviews · Based in Andover, covering Hampshire and Wiltshire