UL Field Inspections. Yesterday we were greeted at the front door by our UL Inspector for an unannounced field inspectionâ¦surprise! At another facility there might be a cry for alarm, but at Coast Label Company there was no mad scramble, no rush to hide this, or go find that. We just sat him down and asked what he was checking today.
Jet pumps create suction in a rather novel way. The pump is powered by an electric motor that drives an impeller, or centrifugal pump. The impeller moves water, called drive water, from the well through a narrow orifice, or jet, mounted in the housing in front of the impeller.
How Most Heat Pumps Work. The most common type of heat pump is the air-source heat pump, which transfers heat between your house and the outside air. In cooling mode, an air-source heat pump evaporates a refrigerant in the indoor coil.; as the liquid evaporates it pulls heat from the air in the house.f you have electric heat, a heat pump can reduce your electric consumption by as much as 30%â40%. High-efficiency heat pumps also reduce humidity better than standard central air conditioners, resulting in less energy usage and more cooling comfort in summer months.