Surgicel is a hemostatic agent (blood-clot-inducing material) made of an oxidized cellulose polymer (the unit is polyanhydroglucuronic acid), manufactured by the Ethicon subsidiary of Johnson And Johnson. It was introduced into clinical practice in 1947. It is used to control post-surgical bleeding.
Multi Stage: (More than one level of heating or cooling) Multi Stage heating means that you have two levels of heat in your home. You will perhaps have a furnace and another method of heat like a solar panel. The second level of heat is commonly referred to as an emergency heat setting.
Therefore, because the low setting is adequate to meet household-cooling or heating demands 80% of the time, the multi-stage unit runs for longer periods and provides more even heat distribution. Heat Pump: (If you have this system, you will know) A heat pump is a single system that does both your heating and cooling.