Infrared Dynamics SunPak S25-S Patio Heaters heat the patio at Bridges Restaurant in Danville, California Recently Alfresco Heating installed nine Infrared Dynamics SunPak S25S gas patio heaters, with electronic ignition at Bridges Restaurant in Danville. The owner wrote to us, "You guys did an outstanding job with the heater installation. I would definitely recommend you to others."