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2. Packaged terminal air conditioner - Wikipedia

   en.wikipedia.org/wiki/Packaged_terminal_air...

   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]

3. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   As of 2015, nearly 100 million homes, or about 87% of US households, had air conditioning systems. [45] In 2019, it was estimated that 90% of new single-family homes constructed in the US included air conditioning (ranging from 99% in the South to 62% in the West ).

4. List of U.S. states by median home price - Wikipedia

   en.wikipedia.org/wiki/List_of_U.S._states_by...

   Home prices by county (2021) <$100,000 $200,000 $300,000 $400,000 $500,000 $600,000 $700,000+ Cost of housing by State. This article contains a list of U.S. states and the District of Columbia by median home price, according to data from Zillow.

5. Mains electricity by country - Wikipedia

   en.wikipedia.org/wiki/Mains_electricity_by_country

   For example, in North America, a unique split-phase system is used to supply to most premises that works by center tapping a 240 volt transformer. This system is able to concurrently provide 240 volts and 120 volts. Consequently, this allows homeowners to wire up both 240 V and 120 V circuits as they wish (as regulated by local building codes).

6. Electricity pricing - Wikipedia

   en.wikipedia.org/wiki/Electricity_pricing

   Electricity price forecasting (EPF) is a branch of energy forecasting which focuses on using mathematical, statistical and machine learning models to predict electricity prices in the future. Over the last 30 years electricity price forecasts have become a fundamental input to energy companies’ decision-making mechanisms at the corporate ...

7. Mains electricity - Wikipedia

   en.wikipedia.org/wiki/Mains_electricity

   This standard established 120 volt nominal system and two ranges for service voltage and utilization voltage variations. [18] Today, virtually all American homes and businesses have access to 120 and 240 V at 60 Hz. Both voltages are available on the three wires (two "hot" legs of opposite phase and one "neutral" leg).