Chase Area Minimums - ORTAL 40 Series Installation And Operation Manual

Chase Area Minimums

No part of the fireplace chase can have a smaller area than the required heat release size for your model (in square
inches). See the section "Heat Release" to find your model's minimum required heat release size.
To determine your chase size:
2
X = (L x W) – (πr )
Where:
X = total chase area (in square inches)
L = chase length
W = chase width
2
πr = the area of your pipe
π = ~3.14156 (a universal constant used when determining the area of a circle)
r = the radius of your pipe (which is half of the diameter)
The size of the smallest part your chase should not be less than the size of your required heat release.
If your heat release is split into 25/75 portions due to an oversized ledge, your chase only needs to be the size of
75% of your heat release because 25% of the heat is already being released at the ledge (see the section "Ledge
(Shelf) Detail" for more information).
Ortal Installation Manual: Built-in Models, December 2019 (V2)
Fireplace Chase: Plan View
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