D.C. Mun. Regs. tit. 12, r. 12-J909
Current through Register Vol. 71, No. 49, December 6, 2024
Strike Section 909.1 of the International Existing Building Code in its entirety and insert new Section 909.1in its place in the Existing Building Code to read as follows.
Ventilation required. Where an existing dwelling unit is undergoing a Level 3 alteration and its air infiltration rate is less than five (5) air changes per hour when tested with a blower door at a pressure of 0.2 inch water column (50 Pa) in accordance with Section R402.4.1.2 of the Energy Conservation Code, the dwelling unit shall be ventilated by mechanical means in accordance with Section 403 of the Mechanical Code .
D.C. Mun. Regs. tit. 12, r. 12-J909