The Legend of Hell House (1973) is a British supernatural horror film directed by John Hough and based on the novel Hell House by Richard Matheson. The story follows a team of investigators who enter the infamous Belasco House to determine whether life after death exists. As they conduct their experiments, the group encounters violent paranormal phenomena tied to the house’s disturbing past.

Från IMDB:
A physicist, his wife and two mediums are hired to investigate the Belasco House, where 27 guests had inexplicably died in 1927, along with most of a team of paranormal investigators that was sent in the early 1950s.