Hot air ovens are usually fitted with a thermostat to keep the temperature constant, and they can withstand ambient temperatures up to 250°C. The hot air inside the oven chamber is circulated by a fan in certain hot air ovens , which can assist in ensuring that the materials being treated are heated or dried uniformly. Explore the hot air oven's diagram, working principle, types, and applications for effective lab and industrial thermal testing. Manufacturer of Hot Air Ovens - Hot Air Oven , Hot Air Oven Bottom Heater offered by Bio Technics India, Mumbai, Maharashtra. Buy Eshaan Hot air oven digital Mechanical Convection Laboratory Oven for Rs.25000 online. Eshaan Hot air oven digital Mechanical Convection Laboratory Oven at best prices with FREE shipping & cash on delivery. Only Genuine Products. 30 Day Replacement Guarantee.