This same study also found that a lactate value greater than 6.6 mmol/L had a high predictive value of gastric necrosis and poor outcome. 11 Initial measurement of lactate should not be used to recommend euthanasia. It is more important to follow changes in lactate value with treatment than to make inferences based on a single value. Many animals with a high initial value respond favorably to treatment, as evidenced by a decrease in lactate value, and their prognosis improves.
Definition of energy efficiency: Percentage of total energy input to a machine or equipment that is consumed in useful work and not wasted as useless heat.
You have two main options: 80% and 95% efficient. Efficiency refers to the percent of fuel that is actually being used to heat your home. A 95% unit will have less fuel cost because 95% of the natural gas burned will be used to heat your home. In cold weather climates it is always a better choice to buy the most efficient unit you can afford.