CX 21 04 Total Pollution Exclusion With A Building Heating, Cooling and Dehumidifying Equipment Exception and a Hostile Fire Exception

An Insurance Services Office (ISO) standard form. It replaces the excess liability pollution exclusion with a total pollution exclusion, keeping exceptions for injury inside a building from heating, cooling or dehumidifying equipment and for heat, smoke or fumes from a hostile fire.

• Edition in use: in the past 12 months, 4 companies filed the 04 13 edition.
• CX 00 01 (Commercial Excess Liability Coverage Form) is filed alongside it most often, in 39 of the same filings (43%).

Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings. One filing can cover several affiliated companies.

• Chubb Limited GroupFiles its own version: XS-382355.2 Total Pollution Exclusion with a Building Heating, Cooling and Dehumidifying Equipment Exception and a Hostile Fire Exception (1 state)
• WR Berkley Corporation GroupFiles its own version: CL CU 2317 Total Pollution Exclusion with a Building Heating, Cooling and Dehumidifying Equipment Exception and a Hostile Fire Exception (19 states)

• CX 00 01Commercial Excess Liability Coverage Form39 filings
• CX 21 02Total Pollution Exclusion39 filings
• CX 21 06Exclusion – Products- Completed Operations Hazard39 filings
• CX 21 07Exclusion – Designated Work38 filings
• CX 21 08Exclusion – Explosion, Collapse and Underground Property Damage Hazard (Specified Operations)38 filings
• CX 21 20Exclusion - Professional Services38 filings
• CX 24 33Noncontributory - Other Insurance Condition38 filings
• CX 21 01Nuclear Energy Liability Exclusion Endorsement37 filings
• CX 21 03Total Pollution Exclusion with a Hostile Fire Exception37 filings
• CX 21 05Exclusion – All Hazards in Connection with Designated Premises37 filings