Energy star ratings require skilled tradespeople at the point of installation.
Cheaper installation options can lead to higher energy consumption.
"Remember - You Get What You Pay For"
Reduce your energy consumption, make the switch now to natural refrigerants in your equipment.
"Much of the refrigeration and air-conditioning equipment in Australia uses fluorocarbon refrigerants to facilitate the heat transfer process. Fluorocarbon refrigerants are synthetic chemicals which usually have a high global warming potential, and some still have the potential to cause damage to the ozone layer if released to the atmosphere.
Alternatives to these chemicals exist that can help to mitigate the environmental risks. Often referred to as 'natural' refrigerants because the substances also occur in nature, these alternatives include ammonia, carbon dioxide and hydrocarbons.
These substances have been used as refrigerants for many years, however, they are now finding their way into applications where previously fluorocarbons were the preferred option." (CA Group Services, Victoria) http://www.cagroupservices.com.au/services/natural-refrigeration-solutions
Read more on how you can do your bit for the environment and reduce your enrgy costs at the same time.
"Most HVACR systems in use today are based on synthetic refrigerants. As a direct result, most suppliers of HVACR systems are only familiar with synthetic refrigerant-based technology because they grew up and developed their business when we thought synthetic refrigerants were the answer. Inevitably this is their comfort zone, but it shouldn’t be yours because the current range of synthetic refrigerants are not as energy efficient as natural refrigerant based technologies." https://sourceable.net/the-why-how-of-hvacr-energy-efficiency/