Taking care of your heating furnace, air conditioning system, and plumbing can be your most important and costly household duties. Climate control and plumbing have actually been around for millennia, but in the past century, both have greatly advanced technologically, making their maintenance more complex and important. Plumbing has been around since about 2750 BC, and the word “plumbing” actually comes from the Latin word for lead, since most pipes in Roman times were made from lead, rather than copper.

Heating and cooling units for homes are a fairly modern invention. The cooling window unit was actually invented in the 1930s, but it took much lo

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