STANDARD SPECIFICATIONS

PH series filters provide medium to high efficiency performance and extended service life.
FOUR EFFICIENCIES are available: 45%, 65%, 85% and 95%.
While the PH is a replaceable filter, its completely rigid construction assures structural and performance integrity throughout its entire service life.

PH filters are ideally suited for variable volume systems. Being totally rigid in construction, performance is not affected by normal changes in heating, ventilating and air conditioning air velocities, or fan shutdown, and the filter’s configuration is not altered by accumulation of dirt.

PERFORMANCE
All PH filters may be operated at velocities up to 500 fpm. Underwriters’ Laboratories rating is Class 2.

XL/PH – Rated on ASHRAE
52-76 Test Standard at 40~45% efficiency.
The arrestance rating on that Standard is 96%.

15/PH – Rated on ASHRAE
52-76 Test Standard at 60~65% efficiency.
The arrestance rating on that Standard is 97%.

100/PH – Rated on ASHRAE
52-76 Test Standard at 80~85% efficiency.
The arrestance rating on that Standard is 98%.

200/PH – Rated on ASHRAE
52-76 Test Standard at 90~95% efficiency.
The arrestance rating on that Standard is 99%.

DERATING FOR ENERGY CONSERVATION
The PH series may operate at lower velocities to effect reduction in energy consumption. Graphs are available from Farr company indicating relative service life and pressure drop vs. airflow.

FFU 24H ABS / FFU 24U ABS
(Fire-proof)

FFU 240SP SUS / FFU 242EL SUS
（Stainless Steel）

FAN MOTOR

Multi-Speed/Double Security Protective
Device Circuit Diagram

Relief Dampers are designed to maintain a positive pressure within outdoor and indoor modules, therefore preventing the ingress of hazardous gases. Designed to operate n some of the world’s harshest environments, the use of high-grade materials and components ensures repeated high performance with minimal maintenance.