Refer to table 5C. A low heat residential gas appliance without a draft hood has a chimney connector made of single wall metal pipe. The clearance from the connector to any unprotected combustible surface must be at least ____ inches.

Refer to table 5C. A low heat residential gas appliance without a draft hood has a chimney connector made of single wall metal pipe. The clearance from the connector to any unprotected combustible surface must be at least ____ inches.