While no current legislation limits the GWP of refrigerants in the US, the Environmental Defense Fund has proposed a bill that would tackle high GWP gases first in California, and later hopefully also at the federal level. CO2 is specifically mentioned as a high-potential replacement. Environmental Defense Fund (EDF) has put forward an amended version of Assembly Bill 1373 calling on the California Energy Commission...

Refrigerating and air conditioning systems in the states of the Russian Federation are starting to show their age. A large proportion of the machines date back to between the 1930s and the 1960s, are technically worn out and consume disproportionate amounts of energy. The systems are uneconomical to run, with high costs for maintenance and repairs.

The SolarWall® air heating system is a custom engineered solution containing many internal and external components. It uses solar energy to heat and ventilate indoor spaces in new and retrofit applications, as well as to heat air for manufacturing process and agricultural crop drying applications. The system design is optimized to maximize energy delivery with a minimum amount of static pressure in the airflow.

Insulation should ensure that the internal surface temperature of walls and ceilings is less than 9°F above indoor-air temperature. In hot climates, a barrier should be provided on the underside of a roof to avoid radiant gain from the roof to occupants. With appropriate ventilation of the space, indoor-air temperature will be equal to outdoor-air temperature.

Although air is not cooled by movement alone, it can create a cooling sensation as it passes over a person's skin. The proper use of air movement, then, can increase occupant satisfaction. It also can improve energy efficiency, as substantial savings can be realized by destratifying heated air in spaces with high ceilings during cooler months.

In a second level, testing the release of HFO-1234yf oil mist onto a surface with lower temperatures was investigated. The temperature was reduced to 800degC in order to simulate an operating turbo charger hit by a mixture of tetrafluoro-1-propene and PAG oil ND8. In this scenario the mixture was again ignited.