A specialized filter capable of removing 99.97% of particulates 0.3 µ in diameter.
High-intensity discharge (hid) lamp
A general term for mercury, metal halide and high-pressure sodium lamps. Hid lamps contain gases and metal salts operating at relatively high pressures and temperatures.
High-pressure sodium (hps) lamps
Hps lamps are high intensity discharge light sources which produce light by an electrical discharge through sodium vapor operating at relatively high pressures and temperatures.
High-rise
A building usually taller than six stories, serviced by elevators. The designation as to high-rise is determine by local codes.
Higher heating value (hhv)
The maximum heating value of a fuel sample, which includes the calorific value of the fuel (bone dry) and the latent heat of vaporization of the water in the fuel.
Highest and best use
Appraisal term meaning the legally and physically possible use that will produce the greatest current value.
Highway
A main road or thoroughfare.
Highway easement
The construction of a highway right of way over a privately held parcel of land. Property owners are compensated for the value of the property usurped by a highway easement.
Hill
A cluster of plants or roots with a pile of soil around it.
Hinge
General term for a pivoting fastener, which attaches a door to a frame or molding, providing support and allowing it to be opened and closed. Several types of hinges are thrust pivot, full and half mortise and full and half surface. A line up of major hinge types would be the butt, butterfly, double acting, Euro, H & H, Pivot, Self-closing and Soss.
