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Hot water pressure washers: applications for venting through roof and side wall

A picture of a side wall venting for a pressure washer system.

Ventilation plays a vital role in the efficient operation of a hot water pressure washer, not to mention ensuring the safety of your workers. Determining whether to vent through the roof or a wall depends on various factors, including the building’s design, local regulations and the specific requirements of your pressure washer. Here’s why pressure washer venting is so important, plus an overview of your options for installing your onsite hot water pressure washer.

The dangers of improper ventilation

Hot water pressure washers burn gas or diesel to heat water, so your interior space can accumulate carbon monoxide if your hot water pressure washer is installed indoors without proper venting. Carbon monoxide is an odourless, colourless gas that can make you very sick or kill you when inhaled in high concentrations.

Inadequate ventilation can also cause the pressure washer to overheat, reducing its overall efficiency. This can lead to increased fuel consumption, decreased equipment lifespan and potential damage to essential components.

Roof venting

Venting through the roof is a common choice, especially for buildings with existing roof penetrations or those where it’s easier to route exhaust gases vertically. Roof venting may require professional installation to ensure proper sealing and insulation around the vent.

A draft diverter is an excellent device for roof venting. It prevents downward or upward airflow that can affect the operation of the burner. It also draws cool air in and mixes it with the hot exhaust to lower the temperature of the chimney.

A motorized damper is beneficial when the unit isn’t in use. It seals the chimney and prevents heat from escaping or cold air from entering, thereby preventing frozen coils.

Side wall venting

 Venting through a wall is a viable option when roof venting is impractical or when local regulations permit it. A wall vent has a built-in fan that starts to move air outside when the burner switch is turned on. Situations where side wall venting is required include:

  • Overhead cranes interfere with the chimney
  • The roof itself can’t be penetrated
  • The roof is too high
  • The unit is housed in a small room
  • There’s an office or storage space above the room

Wall venting can save you money on installation costs if the pressure washer is installed in a separate room inside the main building.

Hot water pressure washer installation in Western Canada and North Dakota

 At Hotsy Water Blast, our team of professional installers will ensure your hot water pressure washer is vented correctly, ensuring safe and efficient operation. Contact us today to get a quote on your custom pressure washer cleaning system.