Employment in plumbing and HVAC in the U.S. 2020, by state and segment

California employment in plumbing and HVAC was nearly three times higher than that in the state of Pennsylvania. Unsurprisingly, the more populous the state, the more employees it had in this specific sector in 2020. Most of the population working in this industry were employed by plumbing and HVAC contractors. This results are in line with the number of establishments of plumbing and HVAC per state.

加利福尼亚州在管道和暖通空调行业的就业人数几乎是宾夕法尼亚州的三倍。不出意料，州际人口密度越高，该特定行业的就业人数亦相应增加。2020年，从事该行业的大部分人口均受雇于管道和暖通空调承包商。这一结果与各州管道和暖通空调企业数量的分布趋势相吻合。