Bromic is continually improving their products. That is the biggest takeaway I got from a recent meeting with Bromic Heating at Alfresco Heating's Novato main office. Changes include hardware that is more corrosion resistant, upgraded stainless steel grade on some models, improved exhaust air flow on gas heaters, and better service access (which won't matter until you have a repair bill to pay). Bromic's newest patio heater is the 3400 watt Platinum Electric. Our techs are all attending service training, this month, with Bromic's technical-support team. We are happy have the Bromic product line and glad to help you from selection of heaters through installation, and for many years of service life.