Take your time in this area. There are some rooms where you can hide from him and avoid him. As I recall, there is a table you can get under or behind which provides some lovely cover for you. When you open the door, don't just stand around. Open it up and move around a little. He is quick when he knows where the player is, but there are ways to slow him down if he is nearby.
Or, here's a spoiler tag for a proper explanation. Not a spoiler, but his mechanic, which, once seen, will make everything a whole lot easier, but also can ruin the experience.
Best of luck!