John Szczygiel has been appointed president of the Security Systems division of Siemens Building Technologies Inc. (Buffalo Grove, Ill.). Szczygiel replaced Mark Landis, who retired. Venmar CES Inc. (Saskatoon,

Ramsey Stephen T. Ramsey has been named CEO of United Pipe & Supply Co. Inc. (Tacoma, Wash.) …DotsonAlso, Terry Dotson has been named president of United Pipe & Supply.Hubbard Elizabeth

Vernon Mark E. Vernon has been named president and general manager of Spirax Sarco Inc. (Blythewood, S.C.).Reifel Nordyne Inc. (O’Fallon, Mo.) has promoted Allan Reifel to vice president of engineering.

Pringle Jerome G. Santowski, president and CEO of Broan-NuTone LLC (Hartford, Wis.) and the Broan-NuTone group of companies, has retired. David L. Pringle has been appointed to assume these positions.Watts

Sinkler Rheem Air Conditioning Division (Fort Smith, Ark.) has appointed Jack W. Sinkler as vice president of marketing …RinkeRheem has also appointed Michael B. Rinke as district technical representative for

Flory David Kinzler has been named senior vice president and group manager of the Technology Group at Syska Hennessy Group (New York). Lennox International Inc. (Dallas) has named Rod Flory

The Unified Group, a network of independent HVAC mechanical contractors, has formed a board of advisors to oversee its five business areas. The co-chairs of each area are: —

The board of directors for the Noland Company (Newport News, Va.) has elected Rhonda L. Binger vice president-human resources. Zonex Systems, a division of California Economizer Inc. (Huntington Beach,

DESA International (Bowling Green, Ky.) has appointed Jim Wiese as president, Heating Product Group. Air Purchases Inc. (Burlington, Mass.), a Trane wholesale distributor, has named Jeffrey Hilyard as assistant

Vilter Manufacturing Corp. (Cudahy, Wis.) has appointed Rohit Arora as executive vice president, sales and marketing, and has promoted Kris Wegner to senior executive vice president/secretary-treasurer, Gloria Spudowski to