By Trevor Rushton12 October 2012
As the deadline looms for outlawing the use of R22 gas in air conditioning and other systems, the question of when and how to replace it is becoming a hot topic (professional, 31.08.12).
You must be logged in to view premium stories.
Take out a print and online or online only subscription and you will get immediate access to:
To get access to premium content subscribe today
Alternatively REGISTER for a free trial to access up to 4 articles and sign up for email alerts