Installing energy efficient boilers. 

Our objective is simple.  To help you heat your home so that you’re warmer and have lower energy bills.  We provide a reliable, highly professional service, at a value for money price.

We bring a new professionalism to the world of heating installations. Our engineers are all Gas Safe registered and fully employed by Optima Boilers.  They turn up on time, they look smart, their van is preloaded with all the items they need, and they take care in the level of finish they achieve. We are proud to be endorsed by Which? Trusted Traders

We install energy efficient boilers in Buckinghamshire, Bedfordshire, Northamptonshire, Oxfordshire and Hertforshire. Book an appointment for a free survey and quote.

Optima Boilers are part of National Energy Services, a company with over 30 years’ experience in making buildings more energy efficient. National Energy Services Limited is registered in England and Wales under company number 01753762 and whose registered office is at The National Energy Centre, Davy Avenue, Milton Keynes, MK5 8NA. Our Gas Safe Registration number is 578409.


Tom, Optima Gas Engineer


Harry, Optima Gas Engineer


Tate, Heating Engineer


Each of our Gas Engineers are accredited by the relevant industry bodies. So you’ll always be in safe hands.

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Finance Available

Flexible ways to pay

We offer a range of payment options – choose the deposit and monthly payments to suit your circumstances.


We reduce your energy bills

When fitted with an intelligent controller our systems achieve a 98% (A+) efficiency.


Trustworthy and friendly engineers

We’re a local company based in Milton Keynes with a 30-year reputation for being energy experts. We don’t subcontract.


A company you can trust

We’re proud of our Which Trusted Trader status as well as being Gas Safe and Checkatrade registered.


Tailored advice for your lifestyle and budget

We’ll advise you on the best options that are right for your lifestyle and budget.

warranty flash

10 year warranties available

You can choose either a 5 or 10 year warranty on our Worcester Bosch boilers for complete peace of mind guarantee.

Call us for a survey on 01908 442100

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4 Mill Square
Featherstone Road
Wolverton Mill
Milton Keynes
MK12 5ZD
01908 442100

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Optima is a trading name of National Energy Services Limited
Copyright © National Energy Services Limited 2016.  VAT number 234 4107 40. Company Registration 01753762. Gas Safe Registration 578409