Thoren Caging Systems, Inc. makes ventilated animal-housing systems for research facilities, including its Maxi-Miser® individual-ventilation system for mouse and rat cages. The Hazleton, Pennsylvania company traces its roots to Thoren Industries, which pioneered warm-surface plastic cages in 1953, and developed its Maxi-Miser® pressurized individual ventilation system with The Jackson Laboratory in 1978. Its modular systems can be configured as fixed or mobile installations and are made in the USA.