Recessed Partial Ledge - ORTAL 40 Series Installation And Operation Manual

Recessed Partial Ledge

A ledge over the top of a fireplace that is less than 24 inches from the top of the fireplace viewing area must maintain a minimum
of 12 inches from the top of the viewing area to the bottom of the building material. Entire structure must be non-
combustible (framing and finish).
If ledge surface area exceeds the values shown in the chart below, the heat release must be divided between the ledge and
the chase ceiling: 25% at the ledge and 75% at the chase ceiling. This is referred to as an oversized partial ledge (see diagram
below).
Fireplace Series
40-75*
(includes 31H)
90-130*
150-170
200
250
*Includes Curve & Island and 31H Series Fireplaces
Oversized Partial Ledge
NOTE: Chase area minimum requirements must be met throughout the entire fireplace chase. See "Chase Area
Minimum" section above for details.
30
Maximum Ledge
Surface Area
A x B ≤ 220 sq. in.
A x B ≤ 340 sq. in.
A x B ≤ 410 sq. in.
A x B ≤ 520 sq. in.
A x B ≤ 580 sq. in.
Oversized Partial Recessed Ledge Detail
A = ledge depth, B= ledge width (Top View)