EcoSmart™ Tankless Water Heaters make it easy to enjoy instantaneous, continuous hot water, space-saving design, and significant energy cost savings. 4. Our green, environmentally friendly water heaters offer the largest selection in … Sizing and buying a pool heater is more complicated than just knowing how big your pool is. EcoSmart’s patented, self-modulating, tankless water heating technology delivers hot water instantly—and for as long as you need it. This electrical wiring project is about how to connect the wires from the circuit breakers to a EcoSmart 18 tankless water heater. With 12 gauge wire, use a 20 amp breaker or fuse. To properly size a storage water heater for your home -- including a heat pump water heater with a tank -- use the water heater's first hour rating. A 20-amp breaker would still be large enough. Heads up: this article will focus on tank water heater sizing. As a landscape builder, he helped establish two gardening companies. SHOP BY FUEL SOURCE. For elements over 2500 watts you must use 10 gauge wire and a 30 amp breaker or fuse. Water Heater Deal-Breaker 03:54. Bottom line, For a 4500w heater w/240v it will draw 4500/240 or 18.75 amps so #10 wire and either 25 or 30 amp breaker, depending on code. Heads up: this article will focus on tank water heater sizing. For example, a 20-amp hot water heater needs 12-gauge wire, a 25-amp hot water heater requires 10-gauge wire, and a 30- to 40-amp hot water heater requires 8-gauge wire. If you can plug the heater into a regular wall outlet, the specified voltage should be 120 volts. Would you still size the water heater for the 300 gallons, or just for the fraction of hot water that goes to the mixing valve? To select the right State water heater for your home, try our Xpert product selector for personalized estimates of the performance and estimated energy cost. Change ), You are commenting using your Facebook account. Performance 40 Gal. Electric Water Heaters. In order to make an informed decision about what size of pool heater you should get you will need to know the following information: 1) The volume of your pool 2) The temperature of the water you like to swim in Because such heaters normally draw significantly more power, they are usually on dedicated circuits. A 1500-watt heater on a 120-volt circuit thus needs a breaker of 15.6 amps. Water heater issues may sink Josh and Dina's condo closing. Most demand water heaters are rated for a variety of inlet temperatures. Just sticking a bigger fuse/breaker in is a route to potential disaster, and fitting a bigger incoming breaker without upgrading your supply could get you in hot water with the supply authority. Understanding Water Heater Wiring . Is there a logical explanation for the use of a 60 amp breaker and wiring? Higher temperatures increase the risk of scalding, but even at 120°F, hot water can scald in a … Read More PO Box 1750, Kent, WA 98035 | Tel: (253) 872-7256 | Fax: (253) 859-4660 | Email: info@coatesheater.com A.O. Residential Sizing. Example: if cold water at 40 f, hot water at 140 F, and mixed water temp leaving the mixing valve is at 70 F, the ratio of hot water to cold to the valve is approx = (Tmix- Tcold)/(Thot … The water heater must at a minimum meet the storage requirements or the first hour rating (FHR) requirements of Table 506. Electric tank water heaters come in a variety of sizes and technologies, … This entry was posted on May 31, 2011 at 4:17 PM and is filed under Electrical, Hot water. A level service space not less than 30 inches (762 mm) in length and 30 inches (762 mm) in width shall be present at the front or service side of the water heater. Electric water heaters require a 240-volt dedicated circuit, which serves only the water heater and no other appliances or devices. Beware of imitation Coates heaters being sold online. Include the current draw of any other devices on the circuit when calculating the breaker size. Which size wire and breaker do I need for an electric water heater? Specs call out a maximum of a 54 amp draw. We already covered GPM. The 125 per cent requirement applies only in the case of continuous loads. EcoSmart Tankless Water Heaters. Feeling lost? Pool Heater Sizing Considerations. Wires to the Tankless Water Heater Reviewing the Electrical Question: Question: I bought an EcoSmart 18 Tankless Water Heater. Inspected at home today with 2 titan electric continuous water heaters. Just follow the three simple steps below to choose the right model and size you need. Smith Water Products Co., Inc. On Line www.aosmithwaterheaters.com For Technical Information and Automated Fax Service, Phone: 800-527-1953 SUGGESTED SPECIFICATIONS The water heater(s) shall be Dura-Power Model(s) No. Some large heaters draw up to 50 amps, requiring 6-gauge wire. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. The circuit wiring typically includes a 30-amp double-pole breaker and 10-2 non-metallic (NM) or MC cable. To heat an area like an outbuilding or new building, you must calculate what size heater you need. Note the power draw of the unit, given in watts. The first factor in choosing a tankless water heater is calculating the size of your hot water heater. An acquaintance has an older mobile (galvanized branch water lines), and his water heater: 40-gal/240v/dual 4500w (18.75A), connected to the circuit breaker panel Double Pole-40A breaker with a #12/20Amp cable. (Effective January 1, 2014) FHR=First Hour Rating, 1 ga1=3.7854 L, 1 gph=1.05 mL/s ( Log Out / _____ as manufactured by A. O. SMITH or an approved equal. Multiply the value for current by 125 percent to determine the size of the breaker you need for the heater. As a tankless solution, you save up to 50% on water … I didn't mean there was anything wrong with a 25A breaker. Simply locate the appropriate water heater sizes on eComfort using your information. We already covered GPM. Electric water heaters require a 240-volt dedicated circuit, which serves only the water heater and no other appliances or devices. The breaker protects the wire from overheating. 4500/240 = 18.75 amps, will work on a 20 amp OCPD but, Replace water heater and reconnect existing gas, electric and water lines. As a tankless solution, you save up to 50% on water … This rating is usually on a tag on the side of the water heater. If you’re interested in a tankless water heater and need sizing advice, just check out our blog on tankless water heater sizing. But also what's really standard is people running #10 off a 30A breaker to a residential water heater. Before we get to how to use the calculator to size a tankless water heater, let’s talk about the factors that go into understanding what size inline water heater you need. Step two is to consider the incoming water temperature. So the first step in sizing tankless water heaters is to add up all the flow rates of showerheads, faucets and appliances that are likely to be in use at the same time. This makes these types of water heaters more efficient than traditional storage tank water heaters which could end up reducing your energy bills. You can follow any responses to this entry through the RSS 2.0 feed. Specs call out a maximum of a 54 amp draw. A water heater of this type is required to be considered a continuous load meaning that the branch circuit needs to be calculated at 125% of the heater’s rated ampacity. When inlet water temperatures dip down into the 30s and 40s, larger BTU inputs will be needed. The circuit wiring typically includes a 30-amp double-pole breaker and 10-2 non-metallic (NM) or MC cable. Tankless Water Heater Sizing Guide for residential applications. If you’re interested in a tankless water heater and need sizing advice, just check out our blog on tankless water heater sizing. The most important number to consider when sizing a storage water heater is the “First Hour Rating.” This is a measure of the number of gallons of hot water that the heater can produce in an hour, assuming that the tank is fully heated at the beginning of the hour. Electric medium The Rheem Performance 40 Gal. It is important to match the wire size to the correct breaker or fuse. 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