Osaka Gas Heater Rinnai City Gas RC-508-3 I'm selling this because I bought a new one. It feels old. It's a gas heater. It works perfectly fine. I used it for many years in a 26-tatami mat living room. There is no instruction manual. Due to work, I'm available on Sundays. Shipping is possible if you're okay with the buyer paying for shipping. As-is, no returns, no refunds, no exchanges! Please. Pick-up preferred. Delivery is possible if you're nearby.