Specifications include, but are not limited to: 1. Remove twenty-two (22) existing 48,000btu natural gas infrared heaters. 2. Install twenty-two new (22) 50,000btu (115V 1 Ph.) natural gas infrared heaters to existing supports, gas piping, and electrical. 3. Replace twenty-two (22) heat only thermostats; line voltage thermostat, single pole. 4. Provide any gas flex lines, shut off valves, additional supports, venting, and electrical wiring as needed. 5. All high voltage electrical wire and disconnect box will be reused. 6. All existing support connections and plumbing will be reused. Contractor is to investigate condition of plumbing and supports prior to new units install. 7. Dispose of all old units according to local and state regulations. 8. Provide commissioning, training, and start up.