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Added: 2020-05-09
Category: one
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Years minimum 1500 hours onthejob training

Years (minimum 1,500 hours on-the-job training + 8 weeks at rdc each year). Although older furnace and boiler systems had efficiencies in the range of 56% to 70%, modern conventional heating systems can achieve efficiencies as high as 98.5%, converting nearly all the fuel to useful heat for your home energy efficiency upgrades and a new high-efficiency.

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