Technical Support for Oil Boilers

Most Viewed
General Advice & Videos
Troubleshooting
FAQs
System
Do you recommend treatment of the central heating water?
What is the difference between seasonal efficiency and combustion efficiency?
Can I use a smart heating thermostat like a Nest or Hive system with a Grant Vortex boiler?
Can a Grant Vortex boiler heat water alone without having heating on?
Do I need a frost stat on an external boiler?
Building Regulations
How does Part L of the Building Regulations affect my oil boiler installation?
Fuel
Can condensing boilers be used on gas oil?
General
Where can I find an old boiler manual?
Are oil boilers going to be banned?
What is the difference between a Vortex Pro and Vortex Eco boiler?
Can I connect underfloor heating directly to a Grant Vortex Condensing boiler?
Does the Vortex Pro and Vortex Eco have the same stainless heat exchanger and turbulator baffle system?
Are Grant boilers biofuel compatible?
Installation
Do I need to carry out a heat loss calculation for an oil boiler installation?
Can I connect a Grant Vortex boiler to an older heating system?
Can a Grant boiler be installed on a one pipe system?
Should you Power Flush the heating system before fitting a new boiler?
Manuals & Technical Info
Installation Manuals & User Instructions
Vortex Burner Settings
Vortex Pro Range
Vortex Eco Range
Vortex Boiler House Range
Flue Systems
Accessories
Brochure & Data Sheets
Associated Documents

Find a Merchant

Use our national merchant search to find a Grant supplier near you

Looking for a part

Use our online spares catalogue which lists all of the parts we currently supply for all Grant products

Visit Spares Website
We have an app for that

We have an app for that

Grant TechBox is exactly what its name suggests – an electronic source which stores all the Grant product technical manuals as downloads.

We have an app for that We have an app for that

Couldn't find what you were looking for?

Alternatively you can speak to a member of our team - Subject to Operating Times

+44 (0)1380 736920 info@grantuk.com

Return to top
Are you a homeowner? Please click here.