EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANT ------------------------------ State of Subsidiary Incorporation Doing Business As - ---------- ------------- ----------------- Hearth Technologies Inc. Iowa Hearth Technologies Inc. Holga Inc. Iowa Holga Inc. BPI Inc. Iowa BPI Inc. The Gunlocke Company Iowa The Gunlocke Company HON Export Limited Iowa HON Export Limited T. M. Export Inc. Barbados T. M. Export Inc. -81-