Easily to the top of ventilation! Tight, efficient, stylish. These three qualities define how MX ventilation products finalize the exhaust ventilation of buildings. MX ventilation products are a product line of ventilation and roof accessories manufactured by Meltex in Finland, offering solutions for stylish and efficient finishing of building exhaust ventilation. The product family includes roof penetrations, exhaust pipes, ventilation pipes, roof fans, roof hatches, and crawl space ventilation poles.