What Causes Facet Syndrome? Facet syndrome is generally the result of the natural aging process. However, the initial cause of arthritis, or facet syndrome, may also be an injury or overuse of the joints in youth. Another possible cause of facet disease is spondylolisthesis, which is when one vertebra â usually in the lumbar spine â slips forward over the lower vertebrae. When the facet joints become inflamed due to injury or age, the result is stiffness and pain.
An energy recovery ventilator (ERV) is a type of mechanical equipment that features a heat exchanger combined with a ventilation system for providing controlled ventilation into a building.
Gas tankless versions are around .8 with the newer electric heat pump versions easily hitting 2.5.) Recovery Rate: The recovery rate is the amount of hot water the water heater is capable of producing in a given period of time. The amount of hot water provided will depend on several things: Wattage of the heating elements / burner size, efficiency, temperature rise required, and the time frame used to measure the recovery rate.