What is the recommended psi for a pressure washer?

Gas-powered models typically put out 2,000 to 2,800 psi of pressure compared with 1,300 to 1,700 psi for electric models. Much higher pressure allowed the top-performing gas machines to clean a grimy concrete patio three times faster than the fastest electrics. Is higher psi better for pressure washer? Generally, contractors or professional cleaners will find…