Most premium pressure washers feature Horizontal style coils while vertical coils can be found on lower cost alternatives. When determining which style to purchase, you should consider some of the environmental factors that can affect the burner and coil performance. When exposed to rain, vertical coils tend to trap small amounts of water at the base of the coil where the burner is located – causing the base plate to rust and potentially causing malfunctions in the burner. Vertical coils typically position the burners closer to the ground than horizontal models leaving the burner open to environmental hazards close to the ground. On a horizontal coil you will find the coil insulation will remain in place while vertical coil insulation can sag over time resulting in a loss of efficiency. Soot is another significant consideration when determining coil orientation. On vertical models, gravity can pull soot into the burner nozzles causing a clog and uneven or poor heating while on horizontal models the soot is dropped away from the burner increasing the reliability of the burner. Hydro Tek utilizes horizontal style coils whenever possible.