Steam is introduced at much higher temperatures and a lower GPM flow. These cleaners don't just use pressure to remove the worst stuck-on dirt and grease. Instead, they use very hot steam to loosen and wash away stubborn stains and build-up. Because there's less water being used in steam cleaning, there is less runoff.

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Downstreaming is a preferred method for cleaning delicate surfaces like windows as it allows the pressure washer to use lower pressure while still achieving the desired level of cleaning.

Since power washing uses heated water, it requires more expensive equipment, meaning you'll pay more for power washing. However, you get what you pay for in this case—especially if you have tough dirt and stains you want to quickly remove from concrete surfaces or other durable materials.