1. full automatic control 2. high speed of temperature rise 3. high heat efficiency 4. long operating life *heating area :300-600-1200-1800m2 ;(Except the drying)*special isolated device and thermal protection between the inside heat pares and shell *do not consume oxygen, no smoke, no smell, no moisture, low noise*99.9% heat transformation stable power and stable power, strong applicability, * ...