redeyedfly
REGISTERED
Should these be included in the maximum openings percentages in Table 705.8 or are they treated as ducts and air transfer openings per 705.10?
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PTAC/PTHP on a FRR Exterior Wall
- Thread starter redeyedfly
- Start date
- Featured
Its a mechanical device, isn't it? I would think it would be governed under the mechanical code.
In any case, PTACs don't actually transfer air through the wall. The "opening" is filled with a metal plate through which it transfers heat the same way an air conditioner does - using refrigerant lines.
In any case, PTACs don't actually transfer air through the wall. The "opening" is filled with a metal plate through which it transfers heat the same way an air conditioner does - using refrigerant lines.
steveray
SAWHORSE
I would say you don't get to 705.10 unless 705.8 is in play for protected openings...?
705.10
Penetrations by air ducts and air transfer openings in fire-resistance-rated exterior walls required to have protected openings shall comply with Section 717.redeyedfly
REGISTERED
Agreed that 705.10 only applies in the very limited condition of an unsprinklered building with 3'-5' FSD. Why the code made the language so unnecesarily complicated, I don't know.
But do you count the PTAC area as part of the openings? I have not found a definition for "opening" as described in 705 but all of the language refers to only doors and windows.