// CODE SNIPPET
602.4 Existing Metal Ducts
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Existing metal ducts shall be permitted to be used where cooling coils are added to a
heating system, provided the first 10 feet (3048 mm) of the
duct or plenum measured from the cooling coil discharge are
constructed of metal of the gauge thickness in accordance
with SMACNA HVAC Duct Construction Standards- Metal
and Flexible. Existing metal ducts completely enclosed in
inaccessible concealed areas are not required to be replaced.
Accessible ducts shall be insulated in accordance with Section
604.0. For the purpose of this section, ducts shall be considered
accessible where the access space is 30 inches (762 mm)
or more in height.
Related Code Sections
602.4 Duct Systems, Existing Metal Ducts
Existing metal ducts shall be permitted to be used where cooling coils are added to a
heating system, provided the first 10 feet (3048 mm ...
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Ducts shall be supported at each change
of direction and in accordance with SMACNA HVAC Duct
Construction Standards-Metal and Flexible. Riser ducts ...
603.3 Duct Systems, Metal Ducts
Ducts shall be supported at each change
of direction and in accordance with SMACNA HVAC Duct
Construction Standards-Metal and Flexible. Riser ducts ...
602.3 Duct Systems, Metal
Ducts, plenums, or fittings of metal shall comply
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A5.205.3.4.3 — Voluntary Standards for Health Facilities [OSHPD 1, 2 & 4], Ducts
If insulation is installed on an existing space-conditioning duct, it shall comply with Section 605 of the California Mechanical Code (CMC) ...
California Green Building Standards Code 2016 > A6.1 — Voluntary Standards for Health Facilities [OSHPD 1, 2 & 4] > A5.205 [OSHPD 1 & 4] Building Envelope > A5.205.3 Insulation and Roofing Products > A5.205.3.4 Installation of Insulation in Existing Buildings > A5.205.3.4.3 Ducts