Providence, R.I.-based Nortek Inc. reported on Tuesday...

Providence, R.I.-based Nortek Inc. reported on Tuesday that it had completed the previously announced acquisition of San Diego-based Linear Corp. The San Diego-based manufacturer of infrared security detection and monitoring systems and components is now a wholly owned subsidiary of Nortek, the company said.

Fleet National Bank, the exchange agent for the merger, will mail a stock transmittal letter to shareholders, a Nortek spokesman said. Shareholders can use the form to exchange their stock for $12.40 per share in cash.

Nortek produces and markets products for the construction, aerospace, industrial and electrical industries.