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A packaged terminal air conditioner (PTAC) is a type of self-contained heating and air conditioning system intended to be mounted through a wall. [1] The first practical semi-portable air conditioning unit invented by engineers at Chrysler Motors. It entered the market in 1935, and was designed to fit under a window like many modern PTACs. [2]
HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...
The Merit series is the lowest cost Lennox air conditioner, and there are 4 models of Single-stage with a 13, 14, 15 or 16 Seasonal energy efficiency ratio (SEER) rating. [2] The units are also available with ratings from 1.4 tons to 5 tons. [1] The company offers a warranty of up to ten years [3]
A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.
Socioeconomic groups with a household income below around $10,000 tend to have a low air conditioning adoption, [42] which worsens heat-related mortality. [7] The lack of cooling can be hazardous, as areas with lower use of air conditioning correlate with higher rates of heat-related mortality and hospitalizations. [89]
Don't set your thermostat too low. Penny-pinchers may be tempted to set their thermostat at bracing levels and survive the winter by bundling up in layers or piling on blankets.
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