ASTM E814
“Standard Test Method for Fire Tests of Penetration Firestop Systems”.
CAN/ULC-S115
“Standard Method of Fire Tests of Firestop Systems”.

DBX1000M 4 in. and 6 in. Metal Dryer Vent Box with Snap on Trim Ring
DBX1017FR 4.25 in. Metal Dryer Vent Box.
DBX1017FR4 3.5 in. Metal Dryer Vent Box

DBX1000M 4 in. dryer vent box is marked by Construction Solutions, LLC with the following information:
a) Manufacturer’s name
b) Product name
c) QAI Listing number (B1072-1A)
d) QAI logo with ‘c’ and ‘us’ identifier
e) 1-hour F, 1-hour T, and 1-hour H (CAN/ULC S115 only).

DBX1000M 6 in. dryer vent box is marked by Construction Solutions, LLC with the following information:
a) Manufacturer’s name
b) Product name
c) QAI Listing number (B1072-1B)
d) QAI logo with ‘c’ and ‘us’ identifier
e) 41-minutes F, 41-minutes T, and 41-minutes H (CAN/ULC S115 only).

DBX1017FR 4.25 in. dryer vent box is marked by Construction Solutions, LLC with the following information:
a) Manufacturer’s name
b) Product name
c) QAI Listing number (B1072-1C, B1072-1D, B1072-1E and B1072-1F)
d) QAI logo with ‘c’ and ‘us’ identifier
e) 1-hour F, 1-hour T, and 1-hour H (CAN/ULC S115 only).

DBX1017FR4 3.5 in. dryer vent box is marked by Construction Solutions, LLC with the following information:
a) Manufacturer’s name
b) Product name
c) QAI Listing number (B1072-1C, B1072-1D, B1072-1E and B1072-1F)
d) QAI logo with ‘c’ and ‘us’ identifier
e) 1-hour F, 1-hour T, and 1-hour H (CAN/ULC S115 only).

The following outlines the assembly and ratings of Construction Solutions 3.5 in., 4.25 in., and 6 in. dryer vent box:

Note: ASTM E814 does not use H-Rating to identify that the assembly passed the hose stream test. The hose stream test is a requirement to achieve an F-Rating.