It depends on the condition of the system, which is why we come and look at it. A hood that was cleaned six months ago and a hood that has not been touched in three years are two completely different jobs, even in the same building.
What moves the number: how long since the last cleaning, how heavy the grease load is, the size and layout of the system, the length and accessibility of the duct run, and how easy the rooftop fan is to get to.
We do not quote over the phone, because that is guessing. Call, we come out and look, and you get a real price for the actual system. The visit is free and there is no obligation attached to it.