Filter
Top Products
17
Filter Type
Maximum
Air Velocity
(ft/min)
Model Number
OH6
OH8
*Thermo Products
Supplied Permanent
600 384 in² 480 in²
Standard
Permanent
500 461 in² 576 in²
Disposable 300 768 in² 960 in²
Table 4: Minimum Required Filter Area (in square inches)
* The Thermo Products supplied filter can be cut to size to fit other filter retention systems as
long as the minimum size requirement is met.
NOTICE: Any internal stiffeners used in the filter must not be removed, although
they can be cut to size as needed.
F. LIMIT POSITION AND LOCATION
WARNING: The predetermined limit locations on all of the Thermo Pride oil fired furnaces have been
tested and approved by Thermo Products, LLC. Any attempt to relocate these safety controls or replace
these safety controls with a control that is not approved, or is incompatible, may result in personal injury,
substantial property damage or death.
The unit listed in the table below must have the limit control installed at the time of unit installation.
Fig. 11: Limit location for OH6 & OH8
TABLE 5: Installation location of
the fan and limit control for each
furnace