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Lämpösulku Oy, established in 1984, is an insulation professional serving Finnish and non-Finnish industries. We employ about 60 professionals in different fields.

Our service range was diversified significantly after Lämpösulku Oy merged with APP-Air Oy specialised in industrial air-conditioning on 1 January 2011. As a result of the merger, Lämpösulku’s services now encompass, alongside industrial insulation, industrial pipelines, dismantling of hazardous insulation and installation of scaffolding, also air-conditioning services for industries and construction, and maintenance services. In this way, Lämpösulku is the only company in Finland capable of providing industrial pipelines, insulations and HPAC services including the necessary dismantling and scaffolding work.