“Home use” is really four jobs that want four different machines. The driveway wants volume. The siding wants low pressure and good detergent delivery. The deck wants a wide fan and a gentle hand. The car wants the least pressure of all. Since almost nobody buys four machines, this page is about which single one handles all four acceptably.
The shape of the right answer
A good all-rounder is a mid-pressure, high-flow machine: roughly 2,000 to 2,500 PSI with 1.76 GPM or better. That combination has enough water to be fast on concrete and enough restraint to be safe everywhere else, provided you change nozzles.
What makes a bad all-rounder is pressure without flow. A 2,500 PSI machine at 1.2 GPM is simultaneously more dangerous on siding and slower on concrete than a 2,000 PSI machine at 1.76 — the worst of both. That is the specification to avoid, and it is extremely common at the cheaper end.
The one gas option, and why it is last
The Westinghouse WPX3200 is here because for a genuinely large property it is the correct answer, and because its onboard soap tank makes it unusually house-friendly for a gas unit. It is ranked below the electrics for home use because 3,200 PSI near siding, trim and windows asks more care than most people will consistently apply, and because seasonal maintenance is a real cost on a machine used four times a year.
Detergent delivery is the feature to check
For whole-house work, how the machine applies soap matters more than almost any other spec. Siding and fencing are cleaned by chemistry, not force (why that is). You want either an onboard tank or compatibility with a downstream injector, plus the black low-pressure soap tip, which is what makes either work.
Two tanks, as on the Sun Joe SPX3000, is a genuinely useful luxury: house wash in one, car soap in the other, no rinsing between jobs.
Reach, not ladders
The other whole-house consideration is reach. A single-story house is fine with a standard wand. A two-story wall is not, and the answer is an extension wand from the ground — never a ladder. Add a gutter attachment if gutters are on the list. Factor those into the budget rather than the machine upgrade.
Then read how to pressure wash a house before you start, and the never-pressure-wash list for the parts to leave alone.
