water-tube type: KV-GM-5.8-115SN ?MVK-5?; KV-G-5.2-115SN ?Grach?; KV-G-2.9-115SN ?Drozd?; KV-GN-2.9-115SN ?Sokol? and shell type: KSVa-3.15Gs ?VK-22?; KSV-2.0Gs ?VK-21?; KSVa-1.25GN ?VK-32? are designed for hot-water supply and heating of residential, industrial and office buildings.