Introducing Infratech Marine UpGrade infrared electric heaters! While all Infratech heaters use 304 stainless steel - a high-grade, corrosion-resistant material - the Marine UpGrade heaters take it one step further. Constructed using more robust anti-corrosive 316 stainless steel technology, they offer enhanced protection for even the harshest environments. With this, you can trust that your investment won't be harmed by humidity, saltwater corrosion and other environmental factors. Upgrade your C-Series and CD-Series, W-Series and WD-Series heaters while introducing a stunning new look to residential and commercial spaces. Click here for Marine Grade flush mount frames to redesign with confidence.