Drain arrangement for heat recovery unit

Abstract

There is provided a gas heat recovery unit comprising: two gas flow paths in heat exchange contact; a condensate drainage path for each of said two gas flow paths for draining condensate from the respective gas flow path, said two condensate drainage paths being fluidly connected to a common drainage outlet of the heat recovery unit; and each of said two condensate drainage paths comprising a valve which allows passage of liquid but not gas from the respective gas flow path towards the common drainage outlet. Providing a common drainage outlet simplifies installation and minimises the possibility of incorrect installation. It also permits switching the airflows within the unit without requiring any corresponding alteration to the drainage system.

Dependencies are inferred from the claim text.