(1) Weight measurement equal to 2,000 pounds (U.S. short ton) or 2,240 pounds (U.K. long ton). (2) Measurement of air conditioning capacity representing the removal of 12,000 BTU of heat per hour.
Ton of cooling
A cooling unit of measure. Each ton equals the cooling effect of 12,000 BTUh. Heat pumps and air conditioners are generally sized in tons. Typical sizes for single family residences are between two and five tons. It is important to note that actual capacity is not constant and will change based on outdoor or indoor temperatures. The published capacity rating of air conditioners and heat pumps is based on performance at the ARI standard temperature levels of 95 F outside, 80 F inside, and 50% relative humidity. The number of tons a system has is the total BTU capacity of the system. The size of the area to be cooled will determine the correct size of the system in tons. While an air conditioner may be called a three ton unit, it may not produce 36,000 BTU/h in cooling. There is a wide variety of actual capacities that are called "three tons.".
Toner
Pigmented lacquer sealer that is applied by spray. Tuners Provide color and make the surface appear more even.
Tongs
Long hinged tool used for gripping objects.
Tongue
Projecting piece of an object that is designed to fit into a groove in another.
Tongue and groove
Lumber machined to have a groove on one side and and a protruding tongue on the other side so that pieces fit snugly together, with the tongue of one fitting into the groove of the other.
Tool steel
High carbon steel used for making cutting tools.
Tooled joint
A masonry joint where the mortar has been worked with a tool to create a finish effect.
Tooling
Shaping a masonry joint with a special tool to create a desired look.
Toolless blade clamp
The toolless blade clamp allows blade changes without a wrench.
