While many door closers are stated as being approved for metal fire doors, in a number of cases this only applies to insulated metal fire doors. And with around 8 out of 10 metal fire doors sold in ...

Hrmann Flexon's Speed-Guardian 2000 is an insulated security door that has fast operating speeds to reduce the loss of conditioned air for energy savings. Hörmann Flexon's Speed-Guardian 2000 is an ...