What is the likely impact on my energy costs?
Depending on your choice, the energy costs will evolve positively or negatively. For example if you replace your entire system with a new system, there is a high chance that your energy costs will decrease significantly because your previous system was probably very old and costly to run compared to a new system that is much more energy efficient. If you just upgrade your system to replace the HCFC refrigerant by a non-HCFC refrigerant, the probability to loose efficiency and increase energy costs is very high. Efficiency drop can be as high as 20% or greater on some systems where the refrigerant is retrofitted, simply because your system was not originally designed to use this new refrigerant. This will mean that your system will have to run more to recover the efficiency loss thus increasing the energy usage & costs.
