Xjetting wood siding. what proportioner

I know this is window cleaning but Ive got a cedar house to clean soon and I’m needing some pointers to which proportioners I should use. If I go straight mix in the pal can I get away with plugging a different one in or do I need to dilute it also? Hes not looking for a full strip and seal just wants his house washed. easy clean kind of thing. I think is what he said Anything helps guys thanks