By Nathan Gomes (Reuters) -U.S. industrial firm Honeywell said on Friday it would buy air conditioner maker Carrier’s security unit for $4.95 billion in cash to bulk up its building safety business where growth has slowed in recent months. The deal is Honeywell’s biggest under new CEO Vimal Kapur and will offer access to Carrier’s brands such as electronic lock maker Onity, used by many major hotel chains, and cloud-based lock maker Supra. Carrier’s Access Solutions security business provides residential, commercial and industrial security systems. The company was in talks with advisors to spi…