Sign-up for our Therma & Aqua 12 mth plan

Subscription plan - You will be charged £20.80 every 30 days.
Personal Details & Billing Address
Username and password
Payment Information
Human Verification
Confirm Order

Please tick here if you do not want us to use your personal data to contact you by electronic means (e-mail or SMS) with information about goods and services similar to those which were the subject of a previous sale or negotiations of a sale to you.

Show Terms Please accept and agree to the terms and conditions to proceed

ThermaCalc + AquaCalc

Save Over 15%!
  • + CombiCalc Free
  • + Online Storage
  • + Dedicated Customer Support
  • Compatible with ALL mobile devices

Only £5.99 Per Month