Should you leave an espresso machine on all the time or turn it off when not in use? Marc shares expert advice from Michael Hauck, designer/engineer of the Profitec Pro 700 and 500 machines. Some think it's better to leave a machine on to avoid effects of thermal expansion and contraction. Hear what the engineer who designed the respected Profitec Pro 700 dual-boiler prosumer level machine recommends. Learn how much energy a espresso machine uses: Tested: Espresso Machine Energy Usage and Cost: youtu.be/_cgeNhsBDaw Profitec Pro 700 Dual-Boiler, PID Espresso Machine: www.wholelattelove.com/products/profitec-pro-700-dual-boiler-espresso-machine