How Air Conditioners Work. Air conditioners use refrigeration to chill indoor air, taking advantage of a remarkable physical law: When a liquid converts to a gas (in a process called phase conversion), it absorbs heat.
Baldwin, Baltimore County, Maryland Land for Sale. Looking for rural homes and land for sale in Baldwin, Baltimore County, Maryland? LandWatch.com has thousands of rural properties in Baldwin, Baltimore County, Maryland, including hunting & fishing properties, cabins, Land for sale and land auctions.
This article is about the borough. For other places in Pennsylvania, see Baldwin, Pennsylvania (disambiguation) . Baldwin is a borough in Allegheny County, Pennsylvania, United States, and is part of the Pittsburgh Metro Area. The population was 19,767 at the 2010 census.