Appendix B: Opening areas of large or unusual fireplaces

(SEE PARAGRAPH 2.7)

B1 The opening area of a fireplace should be calculated from the following formula:

Equation B1

Equation B1

B2 Examples of L and H for large and unusual fireplace openings are shown in Diagram 45.

Diagram 45 large or unusual fireplace openings. (note for use with this appendix measure L,H and W in mm)

Diagram 45 large or unusual fireplace openings. (note for use with this appendix measure L,H and W in mm)