Patents Assigned to Dunsley Heat Limited
  • Heat exchange apparatus
    Patent number: 5220955
    Abstract: Heat exchange apparatus comprises first and second heat exchange units 2, 4 with spiral pathways, each unit having a central volute which contains a respective impeller 18, 24. The pathways of each unit are separated by flexible metallic strips 14/15/16. The impellers are driven by a common motor 26 therebetween. The apparatus is intended for use in heat exchange between air streams, for example between an air stream extracted from a building and an air stream extracted from outside. Mixing of the air streams is prevented.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: June 22, 1993
    Assignee: Dunsley Heat Limited
    Inventor: Keith H. Stokes