![]() Smith® remains a popular water heater brand for residential and commercial applications. Smith® continued its devotion to technology and innovation as it developed or improved on several manufacturing processes including production line automation, an improved method of welding, and the process of fusing glass to steel which led to glass-lined beer kegs, brewery tanks, and residential water heaters.Ī.O. This car frame was eventually supplied to the likes of Cadillac, Oldsmobile, and Ford. Smith® grew into an integral part of the automobile revolution when it developed a new lightweight steel car frame in 1899. The company began in 1874 making metal parts for baby carriages and bicycles. Smith® provides a comprehensive product line featuring many of the best known brands in the industry. Smith® will have celebrated 145 years in business, and continues to be one of the world's leading manufacturers of commercial and residential water heaters and boilers. Smith® Water Heater(s) from the serial number.Īs of 2019, A.O. This significantly reduces installation costs and can result in a much shorter payback.How to determine the date of production/manufacture or age of A.O. One thing to consider in the example above is that the high efficiency water heater is a power direct vent unit that can be exhausted using PVC rather than metal ducting. $Additional Cost of Model B/$Model B's Cost Savings Per Year = Payback period/yearsĬomparison of two gas water heaters with a local fuel cost of $1.09 per therm. Model B Annual Operating Cost - Model A Annual Operating Cost = $Model B's Cost Savings Per Year Price of Model B - Price of Model A = $Additional Cost of Model BĮstimated annual operating cost savings (Model B) ModelsĪdditional cost of more efficient model (Model B) Once you know the purchase and annual operating costs of the water heater models you want to compare, you can use the table below to determine the cost savings and payback of the more energy-efficient model(s). The energy usage per day in the above equations is based on the DOE test procedure for hot water heaters, which assumes an incoming water temperature of 58☏, hot water temperature of 135☏, and total hot water production of 64.3 gallons per day, which is the average usage for a household size of three people. 0 (this is the highest efficiency unit on the market) and an electricity cost of $0.1301/kWhģ65 X 12.03 ÷ 4.0 X $0.1301 (this is the latest cost of electricity used on the Energy Label) = $143 You need to know or convert the unit cost of electricity by kilowatt-hour (kWh).ģ65 days/year x 12.03 kWh/day ÷ EF x Fuel Cost ($/kWh) = annual cost of operationĮxample: A heat pump water heater with an EF of. 4105/.58 X $1.09 (the cost of natural gas on the Energy Label) = $282 For electric water heaters, including heat pump units (1 therm = 100,000 Btu)ģ65 days a year X 0.4105 therms/day ÷ EF X Fuel Cost (therm) = estimated annual cost of operationĮxample: A natural gas water heater with an EF of. You need to know the unit cost of fuel by Btu (British thermal unit) or therm. Then, use the following calculations: For gas and oil water heaters
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