Continued increases in world gas prices lead to tariff rise for Ten Towns Network area Find out more

Help & Advice Tip: My Pay-As-You-Go Top-Up meter is not working! I have no heating. My meter has error codes. Please Help!

Click Here
Select your town (change) We have set your location here.
You can change it at any time by clicking on the link above.
Connecting to firmus energy

Switching to firmus energy in Greater Belfast?

28 days notice

It takes at least five to six weeks to change supplier. This includes the 28 days notice that we give to SSE Airtricity Gas Supply (NI) Limited on your behalf.

We will tell you when your switch request has been submitted and your proposed final switch date to firmus energy.

Switching is simple

Switching is simple. Complete our online application or call us on 0330 024 9000 to save on your home heating bill. 

Remember to complete the application you will need a serial and module number for PAYG and bank details and SMP for credit meter.

Tip: Have you 'selected your location' above? It helps us find your address. Done? Perfect! Click the 'switch now' button.

Image: Switch to firmus energy in Greater Belfast button
* See are current tariffs

Didn't find the answer you were looking for? Ask a Question

The response time for reply to your query is 24 hours (Excluding weekends and Bank Holidays).
If you have an Urgent Query, please contact our customer services team on: 0330 024 9000

Sign up to
our Newsletter

Exclusive offers and latest news straight to your inbox!

What kind of business are you?

Why am I having to do this?

To give you the most accurate information for your town and county, please enter your postcode below.

How do you pay for your natural gas?

By Credit

Do you receive a monthly bill for your energy usage?


With a Pay as You Go card

Do you purchase a top-up card for your energy?


What kind of business are you?

Small or Medium Business

Small businesses spend about £2,600 or less per bill. Medium businesses spend about £35,000 or less per bill.


Large Business

Large businesses spend about £250,000 or less per bill

Make sure you have your bank details and SMP or meter serial number ready

Bank details

All we need is your account number and sort code *


SMP Number

This is the number usually at the top right of your bill or on your connection paperwork

Okay, I have them

If your account requires 2 signatures, or you are not the bank account holder, please call us first on 0330 024 9000
If you don’t have this number, call our switch team on 0330 024 9000