✅Why use a 75-Gallon commercial water heater? Electric water heaters remain popular, and are the best option in regions where natural gas is limited or expensive. 75 Gallon Commercial Water Heaters – Top 10, A.O. Add To List Click to add item Richmond® Wi-Fi 50 Gallon Hybrid Electric Water Heater to your list. It comes with a lifetime tank warranty and a 4-year parts warranty. However, based on features, reviews, and price, we personally like the Westinghouse 100 Gal. Each Marathon water heater features a high efficiency design that is lightweight and durable. 75-gallon hot water heaters can be used for both residential and commercial usage, and provide enough heated water for you and your premises, without overburdening the water heater itself. 1-888-985-6937. Gas Water Heaters. Whether you need high water delivery or low energy costs—or both, we have your next water heater. Smith PCG-75LP 75 Gallon Residential Water Heater – Gas –, A.O. (6) $379. Zhejiang Chenhong Network Technology Co., Ltd. Foshan Shunde Lingpai Electronic Appliance Co., Ltd. Guangdong Mingjian Electrical Technology Co., Ltd. Zhongshan Allwell Electric Appliances Co., Ltd. Zhejiang Dingxin Electric Appliance Co., Ltd. Guangdong Yalice Electric Appliances Co., Ltd. Zhongshan City Wies Kitchen-Electric Appliance Co., Ltd. Zhongshan Hn Hinew Electrical Appliance Limited. Water Heaters Water heaters that earn the ENERGY STAR come with gas, solar or electric heat pump technology. Tall Marathon non-metallic electric water heater provides hot water with peace of mind. Lifetime 5500-Watt Electric Water Heater with Durable 316 l Stainless Steel Tank – $$$, Triangle Tube Smart80 70 Gallon Water Heater – Gas – $$$$, Reliance 75 Gallon 606 Series Water Heater – Gas – $, A.O. Rheem Marathon 75 gallon electric water heater with exclusive lifetime tank warranty. clear all. The glowing LED lights verify that the heater is operational. Model #E6-50H45DV. Bowl-shaped tank bottom drains completely for easy service and sediment removal. Subsequently, it has an FHR of 84GPH and a recovery rate of 19GPH, which is a substantial amount. Therefore we try not to make solid recommendations, as we don’t know your unique requirements. Smith BT-80 80 Gallon Commercial Water Heater – Gas – $$$$. It includes 3 elements for quicker recovery between hot water draws. Lower Titanium heating element for superior resistance to lime buildup. So in order to ensure that you find the best possible heater for yourself, remember to keep the following factors in mind before making your purchase. https://www.watersystemsguide.com/75-gallon-commercial-water-heaters Not to mention, the heater is fully insulated with moisture-proof fiberglass insulation, that surrounds the storage tank and heavy mineral wool insulation surrounds the combustion chamber. It has high-quality stainless steel within the tank, to help prevent the growth of bacteria within the tank, whilst also preventing metal corrosion. All rights reserved. Smith® 80 Gallon unit is a Tall, Light Service Water Heater which is ideal for commercial usage. RE350S6 Water Heater – Best 50 Gallon Electric Water heater. Alibaba.com Site: International - Español - Português - Deutsch - Français - Italiano - हिंदी - Pусский - 한국어 - 日本語 - اللغة العربية - ภาษาไทย - Türk - Nederlands - tiếng Việt - Indonesian - עברית, AliExpress Take advantage of this trait and save your power consumption bills. Lazada, Browse Alphabetically: Its DynaClean™ Diffuser System Reduces Sediment Buildup which helps extend it’s tank life. Offers limited Lifetime tank and 6 year parts warranty when installed in commercial applications. 10 Year 13,500-Watt Electric Water Heater with Durable 316 l Stainless Steel Tank –, Westinghouse 80 Gal. Top 10 Best 75-Gallon Commercial Water Heaters (2020 Review), A.O. | Showroom If you're wondering why I started WaterSystemsGuide, it's because I previously worked as a water systems specialist/consultant for a large government initiative in California, USA. It’s CSA Certified and ASME Rated T&P Relief Valve, Factory-Installed Meets the Thermal efficiency and standby loss requirements of the U.S. Department of Energy and current edition of ASHRAE/IESNA90.1. Triangle Tube is known for two main things, their feats of hydronic innovation and their incredibly efficient products. Address: 3021 Oak Ave Miami, FL 33133 USA. Smith 80 Gallon Light Service Commercial Electric Water Heater – $, Westinghouse 80 Gal. Smith® 80 Gallon unit is a mid-sized, reliable gas water heater, ideal for applications such as office buildings and duplex/fourplex apartment homes. Things To Consider Before Buying 50 Gallon Electric Water Heaters. The unit meets flammable vapor and NAECA codes. Read through information documents, reviews, discounts and detail brochures on storage tank type and tankless water heaters. recommendations. We’ve listed the following 75 gallon commercial water heaters in order of cost, from the lowest price at the top ($) to the largest price ($$$$$) at the bottom: The A.O. Smith 80 Gallon Light Service Commercial Electric Water Heater –, Electric Recommendation – Affordable & Lifetime Warranty, Gas Recommendation – Affordable & Decent Warranty, A.O. The Westinghouse Electric Light Duty Water Heater boasts a huge 80-gallon tank, making it ideal for families and those that need a lot of hot water fast. Do you want an electric and a durable water heater? Intellectual Property Protection We imagine this would be suitable for someone who doesn’t want to spend too much money, yet get a great warranty and reliable unit, from a well-known, trustworthy water heater supplier. If you want to increase the water heater thermostat(s) setting(s), install thermostatic mixing valves at each point of use. The thermostat(s) on this water heater have been factory set to 120°F to reduce the risk of scald injury. Compare and purchase 75 gallon hot water heater from various brands. The water heater has an automatic safety shutoff gas function, if the pilot is extinguished. Let’s face it: electric water heaters are expensive! The A.O. This is enough to simultaneously maintain four baths running or three baths with an automatic clothes washer running. Compare. This smart water heater features an exclusive “tank-in-tank” design, which means that the water heater uses boiler water as a heat source, so whenever your boiler fires, it’s not just providing heat for your home, but also for your water too. The “draw efficiency” of both gas or electric heaters is generally calculated at approximately 70% of the overall tank storage size. The Maximum temperature on this unit is greater than 180° F. It is built to last, with its proprietary steel formulation with a unique coat of high-temperature porcelain enamel, which helps maximizes the corrosion resistance of the tank. Save my name, email, and website in this browser for the next time I comment. Heavy Duty Bracket 80L Automatic Storage Water Heater Instant Electric Water Heater, large capacity freestanding electric storage water heater 100L 150L 200L, 2.5kw 50 liter Electric Tank Storage Boiler Household Water Heater Square, Manufacture Price Storage Tank Stainless Steel Water tank 30 50 100 200 500 liter for standing water heater, 60l horizontal electric hot water heater with enamel tank, Delicate Appearance Mechanical Temperature Control Electrical Water Heater 3 Liters, Top rated water heaters storage water heater, 50 Liters for household bathroom storage electric hot water heater, A2 80 liters digital temperature horizontal bathing electric storage hot water heater, central hot water tank with electrical heater for bath, Large capacity and energy saving, Instant electric water heater price tap hot water heaters volt tank water heater, 6 10 15 25 50 Liter Home Storage Tank Hot Electric Water Heater for Shower, Competitive Price Electric Storage Water Heater 15 Liter, 12v 220v water heater 8 litre electric water heater, Factory Wholesale high quality 15L 30L 50L 80L 100L storage electric water heater, Reliable reputation 50 liters best electric water heater, 140L(37Gal.) You may buy them for your home, office, or business purposes, as well as inventory for your 75 gallon electric water heater business. Smith BT-80 80 Gallon Commercial Water Heater – Gas –, Westinghouse 80 Gal. | Country Search Main Menu. This also helps to save you money on your gas energy bill. The wide categories of 75 gallon electric water heater ensures that all users get their desired products at favorable prices. Marathon® 75 gal Heavy Duty and Tall 4500W 2-Element Residential Electric Water Heater Part #RMHD75245664590 | Item #5123088 | Manufacturer Part #MHD75245/664590 Call for Pricing EACH Search refinements. The polybutene design makes the tank impervious to corrosion, and eliminates the need for an anode rod (preventing sulphur odors). If you have a compact home, you are likely to find that a regular water heater is too big and bulky. Its maintenance free combustion air intake system means there are no filters to clean and replace. Required fields are marked *. - User Information Legal Enquiry Guide, © 1999-2020 Alibaba.com. Main Menu. Your email address will not be published. Factory installed temperature and pressure relief valve and 1 in. Smith Signature Premier 75-Gallon Tall 6-Year Limited 76000-BTU Natural Gas Water Heater in the Gas Water Heaters department at Lowe's.com. (UPDATED). Begin typing your search term above and press enter to search. The thermostat(s) on this water heater have been factory set to 120°F to reduce the risk of scald injury. Bradford White designs, engineers & builds water heating, space heating, combination heating and storage solutions for residential, commercial, & industrial applications. Typical residential tank-type water heaters are 30, 40 or 60 gallons. 75 gallon water heaters are able to provide a whopping 120 gallons of hot water in the first hour of operation. Nominal capacity is a representative number provided by a manufacturer for comparison purposes. It features automatic temperature controls, with a surface mounted thermostat automatically cycles on and off to maintain the water temp. | ... 75 products in Electric Water Heaters. We’ve included some top considerations to take into account below, before purchasing a 75-gallon industrial water heater for your commercial property. This model is designed to be installed under the sink to save space. Sign Up. Sku # 6835497. Rheem 50 Gal. Other noteworthy features with this water heater are the tank’s stainless steel design making it much more lightweight. Rheem’s Performance Platinum line isn’t just for gas tanks. However, after leaving, I wanted to provide advice and information for others, to pass my knowledge on, so I created this site! This is because as a tank is being emptied of hot water, it is also being filled with cold water, so approximately 70% of it is usable hot water. It comes with a lifetime warranty (on tank), which shows how confident the company is of the high-grade stainless steel Incoloy elements, and the coated tank. Additionally, it includes built-in corrosion-resistant patented anodes, which utilize multiple magnesium rods to ensure corrosion resistance for a long tank life. It requires a 240-Volt electrical connection for installation. - Although the tank capacity of your water heater is an important consideration, and even more … Sort By Featured. Products. *Information provided by the Air Conditioning, Heating and Refrigeration Institute (AHRI) and Bradford White. - Your selection of a water heater using gallon(s) per day will have a $ energy cost savings per water heater over an estimated 13 year life expectancy compared to the model. for pricing and availability. View All. This means that a 75-gallon unit has a draw efficiency of around 53 gallons. Discover how electric water heaters work to determine if this solution is right for you. Westinghouse 100 Gal. Customer Service. Lifetime 5500-Watt Electric Water Heater with Durable 316 l Stainless Steel Tank. Electrical Boiler for CIS/Russia/Ukraine (vertical type) 1) Enamelled Tank 2) Single welding 3) SS840 heating element Electrical Boiler for CIS/Russia/Ukraine (vertical type) 1) Low failure rate 2) Spot welding Electrical Boiler for CIS/Russia/Ukraine (vertical type) Brilliant inside! The 75 gallon electric water heater has incorporated state-of-the-art innovations that’ll solve water-heating needs according to users’ needs. With a single or 3 phase option, installation can be flexible. Sign up for our email newsletter. Alibaba.com offers 237 75 gallon electric water heater products. Its cleverly designed water connection directs cold water to the heating element near the bottom of the tank to minimize the mixing of cold and hot water. If yes, then here we present you a Bradford White electric water heater review. We only see this size of water heater tanks currently for gas water heaters. It is also BOCA approved. There are a few different factors that come into play when talking about this, including the type of heating element inside the tank and the temperature of the water that is entering the unit. 浙B2-20120091. The stainless steel also minimizes the build up of scale inside, meaning it should last a lot longer. Plastic tank eliminates the need for anode rod and prevents smelly water. Click to add item "Richmond® Wi-Fi 50 Gallon Hybrid Electric Water Heater" to the compare list. The Westinghouse Electric water heater uses a combination of high-quality stainless steel construction and energy-efficient operation providing long draws of hot water without consuming large amounts of energy. 浙公网安备 33010002000092号 Their efficiency will let you forget all the water heating problems you may have encountered before. | 10 Year Hybrid High Efficiency Smart Tank Electric Water Heater (7) $2,229. | Affiliate, Product Listing Policy As we mentioned at the beginning of the article, we have listed the water heaters in order of cost, from the lowest price at the top ($) to the largest price ($$$$$) at the bottom. The unit has a LED diagnostic system, which helps with heater maintenance and upkeep. In this current day, large capacity water heaters have gotten far more energy-efficient than then used to be, and because of this, it’s often more preferable to choose a larger unit. The website offers a wide selection of 75 gallon electric water heater for all shoppers, according to their needs. Enter your email address. 00 / each. Recovery Rate: The total amount of water in gallons that the heater can supply per hour, starting with an empty tank. First-Hour Rating . The titanium elements with low watt density reduce the change of element burnout and ultimately provide a longer service life. Filters. Tankless Water Heaters. Press ESC to cancel. Learn why the 75 Gallon Short 6 is right for your home. Lifetime 5500-Watt Electric Water Heater with Durable 316 l Stainless Steel Tank –, Triangle Tube Smart80 70 Gallon Water Heater – Gas –, Reliance 75 Gallon 606 Series Water Heater – Gas –, Rheem 76 Gallon Commercial Water Heater – Gas –, Lifetime warranty on tank, 6-year on parts, Lower energy efficiency when compared to electric units. Savings based on the estimated annual operating cost of a standard 50-gallon electric tank water heater using 3531 kWh per year vs. the 50-gallon, 3.39 UEF AeroTherm ® heat pump water heater using 958 kWh per year and national average electricity rate of 12 cents per kWh. - The 75 gallon Marathon commercial electric water heater comes with a 181 degree thermostat for commercial applications and a factory installed temperature and pressure relief valve for added protection. In this article, we’re going to be talking about the best 75-gallon commercial water heaters that are available on the market, consisting of both electric and gas units. Gallons ? While executing these purchases, you will discover that premium quality is also affordable. Hi! The inlet and outlet have built-in heat traps, keeping the heat in the take for greater efficiency. It comes with a 10-year take warranty (on tank), which shows how confident the company is of the high-grade stainless steel Incoloy elements, and the coated tank. Additionally, it uses Blue Diamond® Glass Lining which provides protection against leaks. Terms of Use of 5 Next >> Showing 1-15 of 69. They heat your water just like standard models but with much less energy, saving you up to $3500 over a unit’s lifetime. It’s powered through 16,500 watts and is extremely efficient when it comes to energy efficiency, reaching approximately 98%. TOP PICK: Rheem Performance Platinum Hybrid Electric Water Heater. Natural Gas Tall Water Heater comes with a 75,100 BTU/hour environmentally friendly Low NOx burner that provides ample hot water for households with 5 or more people. Reliance 6 75 XRRS 75 Gallon Gas Water Heater $1,147.96$1,147.96 $284.40 shipping Only 6 left in stock - order soon. The label on the water heater will list the capacity in gallons. Learn why the 75 Gallon Tall 6 is right for your home. (adsbygoogle=window.adsbygoogle||[]).push({}); WaterSystemsGuide.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Is a 75-gallon capacity commercial water heater enough? Be sure to browse our impressive line of sustainable, high efficiency tankless water heaters , gas tank water heaters , and the most efficient water heater on earth – the Rheem hybrid electric water heater . The unit has a HUGE FHD & recovery rate, 300% more than that of a conventional heater. Shop A.O. Onetouch Rigid foam insulation covers the entire tank for maximum efficiency. STAY UP-TO-DATE. Finally, the inner tank of the smart 80 unit is designed to promote water movement, and hence is specifically tasked to prevent lime built-up. The Gas units have an energy factor of up to .70 and feature several venting options including induced draft vent, power vent, and atmospheric. This way, the products always perform according to vendors’ claims. These qualities are intertwined in Triangle Tube’s Smart Series Indirect Fired water heaters. The capacity on that type of bathtub can vary, but on the larger end of the … Perfect for rural areas, well applications, and areas with very hard water. The tank has a PermaGlas® Glass Lining to help protect it from corrosion, especially due to hot water temperatures. As expected, these units are used within commercial environments, whether that’s shops, salons, retail stores, and offices. It is the most affordable unit that we’ve featured within the list, but don’t let that fool you, it comes with a 6-year warranty and some impressive technical specs and features. Categories. Although they come with different electric power consumption capacities, the 75 gallon electric water heater are generally engineered to use lower amounts of electric current than their equivalent makes. Shanghai Peixu Machinery Equipment Co., Ltd. Zhongshan Feiao Electrical Appliance Co., Ltd. Dingxin Import And Export (Zhongshan) Co., Ltd. Kunshan Zhanbang Electric Appliances Co., Ltd. Guangdong Maggical Electric Appliances Co., Ltd. Guangdong Usaton Electrical Appliances Co., Ltd. Sanjiao Branch. Smith PCG-75LP 75 Gallon Residential Water Heater – Gas – $$$$, Rheem 76 Gallon Commercial Water Heater – Gas – $$$$$, A.O. Lifetime 5500-Watt Electric Water Heater with Durable 316 l Stainless Steel Tank, Top 6 Best 4-Stage Reverse Osmosis Systems (2020 Review), Top 5 Best Countertop Reverse Osmosis Systems(2020 Review), Top 5 Best Reverse Osmosis Systems for Well Water (2020 Review), Top 5 Best Portable Reverse Osmosis Systems (2020 Review), Top 4 Best 3-Stage Reverse Osmosis Systems (2020 Review), Top 5 Best 70-Gallon Gas Water Heaters (2020 Review), Top 5 Best 50-Gallon Commercial Water Heaters (2020 Review), Top 2 50-Gallon Short Electric Water Heaters (2020 Review), Top 8 Best 10 GPM Tankless Water Heaters (2020 Review), Rheem Rudd 80 gal. It includes a strong tank design, using a patented multi-flue design, which combines two coats of porcelain enamel, resulting in a superior heat exchanger design. How long does it take a 75-gallon industrial water heater to heat up? Installing these 75 gallon electric water heater is a major milestone for multiple users because they enable them to acquire the heating levels they’ve wanted for maximum productivity. Electric Water Heaters. Compare. Clear All Filters. | Read our Ultimate Buyer's Guide here at WaterSystemsGuide.com Water Heater Installation Services. Assumptions "Base model" has an efficiency that just meets the national minimum standard for gas and electric water heaters. Your email address will not be published. The tank has a Blue Diamon® Glass Coating to help protect it from corrosion, especially due to hot water temperatures. Electrical Boiler for CIS/Russia/Ukraine (vertical type) Electrical Boiler for CIS/Russia/Ukraine (vertical type) Electrical Boiler for CIS/Russia/Ukraine (vertical type) Electrical Boiler for CIS/Russia/Ukraine (vertical type) Electrical Boiler for CIS/Russia/Ukraine (vertical type) Thank you for attention! According to Westinghouse, their stainless steel tank design is superior to competitor glass-lined tanks, in both protection, preventing scale built-up and being lightweight. 1688.com Compare. Should be a valid email address . I'm Charlie. Water Heaters. Smith Signature 50-Gallon Tall 6-year Limited 4500-Watt Double Element Electric Water Heater. The Rheem Performance 75 Gal. All Listings (filter applied) Auction. Zhangjiagang Delon Thermal Machinery Co., Ltd. Zhongshan Dongfeng Songzhi Hardware&Electric Appliance Factory. | Suppliers A wide variety of 75 gallon electric water heater options are available to … All Home & Garden (8) Home Improvement (8) Heating, Cooling & Air (8) Water Heaters (8) Water Heater Parts (7) Standard Water Heaters (1) Format see all Format. At Alibaba.com, you’ll find amazing 75 gallon electric water heater that’ll let you get the most suitable for your needs, both as a consumer or a seller. Rheem Marathon 75 Gallon Electric Water Heater (4.5kw/240V) (18) $1,349. It’s priced in a way which is still attractive for those who are looking at a more affordably priced unit – We say it’s great value for money for a mid-range unit. 10 Year 16,500-Watt Electric Water Heater with Durable 316 l Stainless Steel Tank –. 00 / each. Water Heater Buying Guide. However, we want for our readers to know that we do a lot of research into the products that we recommend, and you can expect 100% transparency in our product. Add these spectacular 75 gallon electric water heater available at Alibaba.com to your facility at unrivaled, unbelievably low prices. Never miss a deal. Commercial Electric Water Heater, 12000W –, Westinghouse 100 Gal. About 66% of these are electric water heaters. The Reliance 6 75 XRRS is a 75 Gallon gas water heater suitable for both residential and light commercial usage. The unit meets UBC, CEC, SBCC, HUD and BOCA codes, and also federal standards. Write down the capacity. Rinnai Indoor Tankless Hot Water Heater / V75IN / Natural Gas / 7.5 GPM, Large, V75iN-Natural Westinghouse’s 3 Element Commercial Stainless Steel Water Heater allows for flexibility with multiple wiring configurations. Series 606 models feature FVIR technology to help prevent accidental ignition of flammable vapors from gasoline and other sources near the water heaters. Tank water heaters typically hold 40, 50, or 55 gallons or more. The 75 gallon electric water heater are made from top-quality materials that have been carefully-evaluated to ascertain prime efficacy and long durability. | It is versatile enough to be used in a wide variety of applications such as retail stores and small offices. The unit has two 4500-watt zinc-plated copper sheathed elements and it has COREGARD™ anode rods, which have a stainless steel core that extends the life of the anode rod allowing superior tank protection, for a longer life when comparing to standard anode rods. Taobao Global Compare; Find My Store. The unit also has patented resistor elements, designed with a specially treated, double layer of magnesium oxide and copper to resist corrosion. Rheem Ruud’s 80-gallon capacity water heater is considered to be a light-duty commercial unit. Shop electric water heaters and a variety of plumbing products online at Lowes.com. Finally, it comes with a 3-year limited tank warranty, but this can be extended to 5-years. A premium grade anode rod provides long-lasting tank protection. It’s important to highlight that we realize everyone has different needs and requirements for a 75-gallon hot water heater, alongside an entirely different budget. Look for the temperature setting on the water heater. Electric Water Heaters Sort: Showing 1-15 of 69 Show per page view all Page . It comes with CoreGardd™ Anode Rod, which are made from stainless steel, meaning they won’t corrode. Item #816159. for pricing and availability. Rheem Point of Use 8 Imperial Gal Electric Water Heater with 6 Year Warranty. Discover the Best 70 Gallon Electric Water Heaters in 2020. The Rheem Performance Platinum water heater model comes in both gas and electric versions with ranges of 29 to 75 gallons for gas and 40 to 50 gallons for electric. The 3 elements provide quicker recovery between domestic hot water draws. It’s powered through 13,500 watts and is extremely efficient when it comes to energy efficiency, reaching approximately 98%. Foam to floor insulation for high efficiency and light weight for ease of installation. A.O. Compare; Find My Store. Lowes Consumer Credit. The size you buy depends on the number of people living in your home and your peak water usage. Additionally, as for the gas units, we personally like the Reliance 75 Gal 606 Series Water Heater, as it’s priced very affordably, has a very eco-friendly design, and comes with a great warranty. They also function well in homes that are supplemented by solar or other alternate electrical sources. 1512. This Rheem 76-gallon unit is a tall gas water heater, designed and built with commercial/residential usage in mind, being able to meet heavy-duty demands. 10 Year 13,500-Watt Electric Water Heater with Durable 316 l Stainless Steel Tank – $$, Westinghouse 80 Gal. Get $10 off your next purchase. This capacity can often exceed the average usage of most homes, but 75 gallon water heaters are very common in homes that have large jetted bathtubs. Products. Privacy Policy The Triangle Tube Smart80 phase 3 is an indirect, near-75 gallon water heater. 10 Year 16,500-Watt Electric Water Heater with Durable 316 l Stainless Steel Tank – $$, Rheem Ruud 80 gal. It’s a short unit, and utilizes a patented Green Choice® “Eco-Friendly” design which helps reduce NOx emissions by up to 33%. NEED HELP? This also helps to save you money on your gas energy bill. The water heater is ETL and ISO certified. 00 / each. Factory … Rheem 40 Gallon Electric Water Heater Tall 6 Year 4500/4500 Watt Elements ... Save 75 gallon water heater to get e-mail alerts and updates on your eBay Feed. The heavy duty model comes in 75, 85, and 105 gallon tank capacities. At Alibaba.com, the quality of these 75 gallon electric water heater is further supported by having vendors who are carefully scrutinized to ensure that they comply with all regulatory standards. Water Heaters. Commercial Electric Water Heater, 12000W – $$$$$, Westinghouse 100 Gal. However, hot water heaters will have two ratings that will help you determine the answer to this question, and these are: First Hour Rating: The total amount of water in gallons that the heater can supply per hour, starting with a full tank of hot water.