Stigma and Mental Illness. Stigma has been defined as an attribute that is deeply discrediting.1 This stigmatized trait sets the bearer apart from the rest of society, bringing with it feelings of shame and isolation.
The performance of metal halide perovskite solar cells has made rapid increases in energy conversion efficiency, improving from under 4% efficiency in 2010 to a record efficiency of 22% in 2016. Because of the high absorption coefficient, a thickness of only about 500 nm is needed to absorb solar energy.
Consumers should seek high recovery efficiency ratings from the independent Home Ventilating Institute (HVI). High-efficiency HRVs and ERVs should have HVI-rated of at least 76%. This level of efficiency is required to achieve an ENERGY STAR rating for homes with electric heat. The type of controls offered and the unit's energy efficiency compared to other models should also be considered when choosing a recovery ventilator.