Holyoake

23 Plaster Mounting Frame The Holyoake Flangeless Diffuser Series - PMF, has been developed to keep pace with contemporary interior designs. The PMF is versatile and can be used with all LD and LF Series Linear Bar Diffusers. Designed for sidewall applications the PMF Series Flangeless Frame Diffusers are the least intrusive sidewall supply or return air product on the market.