Purifier Filtered PCR Enclosures, provides ISO Class 5 conditions appropriate for polymerase chain reaction experiments. Exclusive features: variable digital timer for UV exposure with eight settings in minutes of 5, 10, 15, 30, 60, 120, 240 and continuous, bi-fold doors that close the sash opening, Guardian Airflow Monitor that continuously monitors downflow airflow and has two LED lights to indicate when airflow is within or outside set point range, aerodynamic air foil, UV-resistant, glacier white and gray, dry powder epoxy-coated aluminum and steel construction, UV-opaque and resistant 1/4" thick clear tempered safety glass sash and sides, ergonomic 10° angled and hinged sash that pivots upward, locks to a loading height of 20" and has wiping seals to contain contaminants. Other features: 99.99% efficient HEPA filter, variable speed built-in blower with motorized impeller and solid state control rated for 10 amps, Minihelic pressure gauge, air diffuser, fluorescent lamp, 254 nm UV lamp with 3-way switch (fluorescent, UV and off), blower switch, 9.4" high sash opening, two utility ports with iris openings and plugs, one year warranty.