Patent ID: 7766732

Claim:
A ductless fumehood system comprising: at least one ductless fumehood, the ductless fumehood comprising: a housing; a workspace disposed within the housing; a door for selectively closing off the workspace; an air inlet for introducing air from an ambient atmosphere into the workspace; a master module disposed in said housing for receiving air from the workspace, filtering unwanted substances from the air, and exhausting filtered air to the ambient atmosphere, wherein the master module comprises: a master module filter; a master module filter sensor for determining functioning of the master module filter; a master module exhaust fan for moving air from the workspace, through the master module filter and out into the ambient atmosphere; a master module alarm for alerting an operator of a failure within the ductless fumehood; and a master module central processing unit for (i) controlling operation of active elements of the master module, (ii) detecting a failure of the master module, and (iii) activating the master module alarm in the event of a failure within the master module; and at least one slave module disposed in said housing for receiving air from the workspace, filtering unwanted substances from the air, and exhausting filtered air to the ambient atmosphere, wherein the slave module comprises: a slave module filter; a slave module filter sensor for determining functioning of the slave module filter; a slave module exhaust fan for moving air from the workspace, through the slave module filter and out into the ambient atmosphere; wherein the at least one slave module is in communication with the master module such that the master module central processing unit is capable of (i) controlling operation of active elements of the slave module, (ii) detecting a failure of the slave module, and (iii) activating the master module alarm in the event of a failure within the slave module.