The following information has been provided by Air-Conditioning, Heating, and Refrigeration Institue (AHRI), Arlington, VA.

Residential Storage Water Heaters
U.S. shipments of residential gas storage water heaters for November 2011 increased 13 percent, to 332,886 units, up from 295,029 units shipped in November 2010. Residential electric storage water heater shipments increased 10 percent in November 2011, to 309,985 units, up from 281,702 units shipped in November 2010. For the year-to-date, U.S. shipments of residential gas storage water heaters increased 0.6 percent, to 3,589,059 units, compared to 3,567,601 units shipped during the same period in 2010.

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Residential electric storage water heater shipments decreased 0.5 percent year-to-date, to 3,390,190 units, compared to 3,408,299 units shipped during the same period in 2010. Commercial Storage Water Heaters Commercial gas storage water heater shipments increased 16 percent in November 2011, to 6,955 units, up from 5,992 units shipped in November 2010.

Commercial electric storage water heater
shipments increased 6% in November 2011, to 4,722 units, up from 4,468 units shipped in November 2010. Year-to-date U.S. shipments of commercial gas storage water heaters increased 3%, to 73,837 units, compared with 71,816 units shipped during the same period in 2010. Year-to-date commercial electric storage water heater shipments increased 3% to 55,075 units, up from 53,690 units shipped during the same period in 2010.

Warm Air Furnaces

U.S. shipments of gas warm air furnaces for November 2011 decreased 14%, to 221,159 units, down from 257,414 units shipped in November 2010.
Oil warm air furnace shipments decreased 31%, to 5,249 units in November 2011, down from 7,590 units shipped in November 2010.

Year-to-date U.S. shipments of gas warm air furnaces decreased 9%, to 1,993,386 units, compared with 2,183,205 units shipped during the same period in 2010.
Year-to-date U.S. shipments of oil warm air furnaces decreased 15% to 43,466 units, compared with 50,981 units shipped during the same period in 2010.

Central Air Conditioners and Air-Source Heat Pumps
U.S. shipments of central air conditioners and air-source heat pumps totaled 232,722 units in November 2011, down 19% from 287,676 units shipped in November 2010.
U.S. shipments of air conditioners decreased 19%, to 145,789 units, down from 179,647 units shipped in November 2010. U.S. shipments of air-source heat pumps decreased 20%, to 86,933 units, down from 108,029 units shipped in November 2010.

Year-to-date combined shipments of residential central air conditioners and air-source heat pumps increased 9%, to 5,237,726 units, up from 4,826,684 units shipped in November 2010. Year-to-date shipments of central air conditioners increased 11%, to 3,571,256 units, up from 3,213,149 units shipped during the same period in 2010.
The year-to-date total for heat pump shipments increased 3%, to 1,666,470 units, up from 1,613,535 units shipped during the same period in 2010.

The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) is the trade association representing manufacturers of air conditioning, heating, and commercial refrigeration, and water heating equipment.