I was looking to see if someone could help me out? I have 3 oil fired water heaters that are coupled together with two 750 Gal hot water storage tanks. The recovery rate is 441 GPH with a combined hot water capacity approximately 5% lower. The fuel consumption is 3.25 GPH. The vent size is 8” in diameter. My problem is that two of the three water heaters already have a cracked shell in less than 3 years. I wanted to make sure the water heaters are actually rated for the demand. The water heaters supply 4 dormitories with each their own lavatory, water closet and sink in each room. In addition they also supply an industrial sized kitchen and cafeteria. I don’t know much about oil fired water heaters and wanted to either replace the entire system with something more cost effective, and durable, or replace the existing water heater with a different oil fired water heater. I am learning as I go along on this project and know bits and pieces of where to start with figuring out the Peak demand, and calculating the GPH to get the correct water heater. I feel like there are a lot of missing pieces and I didn’t have much information on this project. Does any one have good advice in where to start?
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