Tank Water Heating
Tank Water Heaters provide a large volume of dependable, low-cost hot water. Fuel sources can be propane, natural gas or electricity. They are the most common way to heat water in the United States. Residential tank water heaters typically store between 20 and 80 gallons of hot water hot throughout, usually at the factory setting of 120°F. The temperature can be adjusted up or down by a control on the unit. Tank water heaters are typically located in the garage, basement or attic. Upgrading a standard 5' x 9' bathroom to a master suite or an in-home spa may require upgrading to a larger gallon capacity unit, especially if the new bathroom will include a deep soaking tub with a multi-head shower system. Replacing a tank water heater with another tank water heater is fast and keeps labor costs to a minimum.
Tankless Water Heating
Tankless water heaters are today's most popular "green" hot water solution, with the added benefit of actually enhancing the clients' experiences in a luxury bathroom. No matter how many body sprays and showerheads, no matter how deep the whirlpool, your clients will not run out of hot water with a properly sized tankless water heating system. Tankless gas water heaters are more energy-efficient than conventional tank heaters, because they eliminate the need to maintain a large supply of pre-heated water. Tankless units provide hot water on demand at a precise temperature needed, so there is no storage and therefore no need to expend energy heating that stored water. About the size of a medicine cabinet, tankless water heaters can easily be wall-mounted indoors and even outdoors, depending on the climate. The ability to place a tankless water heater closer to the point of use solves the problem of a long wait for hot water. That problem is not solved by simply replacing a tank water heater with a tankless water heater in the same place. Delays in hot water delivery have to do with where the water heater is located, not the type of water heater. Tankless water heaters have convenient digital wall-mounted controls and even waterproof remote controls that make it easy for clients to adjust the temperature as often as they wish for convenience as well as safety. Clients might want exactly 120°F for the dishwasher, but only 106°F for the baby's bath time, and back up to 110°F to fill the tub to precisely the preferred temperature for a relaxing soak.
Solar Water Heating
Solar water heaters are an even greener hot water solution that uses a dark-color solar collector to capture the solar energy. Solar water heating systems can be "passive," where the water flows between the collection are to the storage tank via gravity or some other non-mechanical means; or "active," which uses a circulating pump to move water through the system. An active system may also be called "forced circulation," and requires more energy than passive systems. Even the most efficient solar water heaters sometimes require some auxiliary heating (boosting). This may be because of a large, late-in-the-day hot water usage or after a long period of extensive cloud cover. An electric, gas or other fuel-type booster can be quite effective in enabling a solar water heater to provide a year-round supply of steaming hot water, but it also obviously adds more energy requirements.

Electric Water Heaters
Solutions For Every Size Family & Budget Rheem offers a full selection of electric water heaters for reliable hot water all year long. We are sure you will find a hot water solution to fit your lifestyle and budget. Defining a new standard in quality. Our Professional^TM Line is a complete range of hot water solutions with exclusive features and professional grade quality. These products are available exclusively through our contractor partners. Electric powered Professional^TM Line: ENERGY STAR® certified models available Up to 2.45 energy factor High quality components that make maintenance easy and keep your water heater working better for longer Easy-to-use controls with diagnostics on select models Up to 12-year tank and parts warranty
Professional™ Line
Professional Prestige Series: Hybrid Heat Pump		Professional Classic Plus Series: High Efficiency		Professional Classic Plus Series: Electric		Professional Classic Series: Point-of-Use
	Super efficient – 2.45 energy factor, over TWICE the efficiency of standard electric water heaters Fast recovery, easy installation Easy-to-use LED touch pad Qualifies for federal tax credit		Designed for professionals by professionals 40, 50, 65, and 80 gallon capacities Engineered components for longer life – resistored heating elements, premium grade anode rod		45 and 72 gallon capacities Resistored copper upper element and resistored Lifeguard™ stainless steel lower element to prolong anode rod and tank life		Space-saving design for installation in limited spaces 2.5, 6, 10, 15, 20 and 30 gallon capacities High efficiency heating element Temperature and pressure relief valve included
Performance® Line
Performance Platinum Series: High Efficiency Electric		Performance Plus Series: High Efficiency Electric		Performance Series: Table Top		Performance Series: Point-of-Use
	.92 - .95 EF 40, 50 and 80 gallon capacities Engineered components for longer life – resistored heating elements, premium grade anode rod		Designed for professionals by professionals 40, 50, 65, and 80 gallon capacities Engineered components for longer life – resistored heating elements, premium grade anode rod		Recessed base and channel in back panel for snug fit against the wall 40 gallon capacity Baked enamel top for a beautiful finish Engineered components for longer life – resistored heating elements and premium grade anode rod		Space-saving design for installation in limited spaces 2.5, 6, 10, 20 and 30 gallon capacities High efficiency heating element Temperature and pressure relief valve included
Specialty® Line
Tankless Electric RTE 9		EcoSense Tankless Electric 9kW		Tankless Electric RTE 27		Tankless Electric RTE 3
	Perfect for installations under a kitchen sink 240 Volts - 9KW 3.0 GPM maximum flow rate		Continuous hot water on demand Lightweight Easy water connections using 1/2-inch compression fittings		240 Volts - 27KW 5.0 GPM maximum flow rate		Designed for low flow single bathroom sink applications 120 Volts - 3KW 1.5 GPM maximum flow rate
Tankless Electric RTE 18		EcoSense Tankless Electric 18kW		Marathon Heavy Duty		EcoSense Tankless Electric 7kW
	Just right for bathroom renovations or additions 240 Volts - 18KW 5.0 GPM maximum flow rate		Continuous hot water No venting need Compact size - fits almost anywhere		Available in 85 and 105 gallon capacities .91 - 92 EF The most durable electric water heater ever made High efficiency design and a lightweight tank that won’t corrode		Continuous hot water on demand External temperature control Complete install without removing the cover

How Water Heaters Work?

About Tank Water Heaters

Get Smart - Water Heaters and Safety The most common way to heat water in the United States is with a tank-style water heater. Tank water heater units heat water even when not in use, to compensate for standby heat loss. Insulation between the storage tank and the outer jacket slows this heat loss, but cannot eliminate it entirely. To maintain a preset water temperature, the water heater must cycle on periodically, even when there is no demand for hot water.

Tank water heaters generally have about 70% usable capacity, meaning a typical 50-gallon tank has about 30-35 gallons of truly hot water in reserve for usage. If there is high demand over a short period - a family taking back-to-back showers in the morning or a vacation home packed with guests - the hot water can run out. When it does, homeowners have to wait for the water to get hot again.

Current gas hot water heaters contain special flammable vapor ignition resistant (FVIR) technology that prevents the ignition of flammable vapors, such as spilled gasoline, outside the unit. All gas hot water heaters sold since July 1, 2003, must have this FVIR technology. (See adjacent information.)

Installing Tank Water Heaters

If a remodeling budget is tight, tank water heaters will likely be the most affordable choice, since labor requirements are minimal. Installed costs are typically between $500 to $1,000.

Best Tank Water Heaters for Luxury Bathrooms

Rheem Ultra Low NOx line of Imperial, Professional or Fury, Models

Patented, environmentally-friendly, radiant burner virtually impervious to scale and mineral buildup for the life of the water heater.
Nitrous-oxide emissions at only 10 nanograms per Joule, complying with Southern California's SCAQMD (South Coast Air Quality Management District) Rule 1121.
Warranties between 6 and 10 years, depending on the water heater model.

The Ultra Low NOx water heaters also include the Guardian Flammable Vapor Ignition Resistance (FVIR) System. First unveiled by Rheem in 2003, the proprietary Guardian System incorporates an exclusive air and fuel shutoff mechanism that shuts the water heater down quickly and safely should vapors ignite within the combustion chamber. In addition, the Rheem Guardian System is maintenance-free, with no filters to clean-ever.

Sizing Water Heaters

What size of water heater do you need

Sizing is the technique that matches the capacity of the hot-water source to the needs of the homeowners.

For tank water heaters, the key criterion is hot water storage capacity
For tankless water heaters, the key criterion is hot water flow rate

Incoming water temperature is a critical consideration, which varies by region and season. That is, a water heater in the North - either tank or tankless - will need a higher BTU input in the winter than the summer to heat and deliver water to a given temperature.

Regardless of which type of water heater is used, you should start with a lifestyle audit of your client's typical usage:

How many people are showering and when? Is there a "shower rush hour" in the morning or night?
Do they have a deep soaking tub or whirlpool? What is its fill capacity in gallons? And how do they use their tub; e.g. do they take a long shower first and then get into a full tub?
When are major appliances in use? Are the dishwasher and washing machine needed at the same time family members are showering? Most Americans are accustomed to staggering hot water use, so it is atypical to find a home where multiple hot water appliances are needed at the same time.
How much hot water is needed to deliver the experience clients want in their bathroom remodel? For example, is there enough hot water to fill a deep soaking whirlpool or to operate a vertical spa-type shower for any length of time?

Establish peak demand, measured in gallons per hour (gph). Then evaluate tank water heaters on the same gph basis to determine how many gallons of storage are needed to meet this demand.

While tankless water heaters do not run out of hot water, if not sized correctly, the flow rate of that water can be adversely impacted. The temperature of the shower will remain the same, but flow could slow to a trickle. 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.

Step two is to consider the incoming water temperature. When inlet water temperatures dip down into the 30s and 40s, larger BTU inputs will be needed. In certain high-volume applications, you may want to specify more than one tankless water heater unit, either installed separately or connected together to operate as a single tankless system. The Rheem EZ-Link™ technology will facilitate this application.

Hot Water Usage Audit Questionnaire

Print Questionnaire

Baths: How many bathrooms are in the house?
Showers: How many showers are in the house and how many showerheads, body sprays and side sprays are in each shower? How much water do they use? Standard showerheads have a flow rate of 2.5 gallons per minute, although new water-efficient showerheads have a lower flow rates. Most people are comfortable showering in water temperatures around 102°F to 106°F.
Bathtubs: How many bathtubs and whirlpools are in the house? How many gallons are needed to fill each to capacity? Note: While small tubs are usually about 40 gallons, deep soaking tubs can hold up to 140 gallons. As with showering, remember, most people bathe at temperatures between 102°F to 106°F.
Schedules: What is the typical bathing and bathroom use schedule in the home? How many occupants are likely to be bathing simultaneously?
Other hot water appliances: Are any other hot water appliances in use at the same time? If so, these need to be calculated also, e.g., dishwasher, hot-water laundry, kitchen use, etc.
Geography: Where is your home? Consider the winter inlet water temperatures in the area to make sure there's sufficient hot water flow on the coldest days. The rule of thumb is:

i.    40°F for the northern tier of states.

ii.    50°F in most parts of the South.

iii.    60°F year-round in Southern California, the Southwest and Gulf states.
Do the math; select the right unit: Add up your peak demand in gallons per minute and see which size of tank water heater will satisfy this peak requirement at the very coldest time of the year; i.e., when the difference between the inlet and outlet water temperatures will range as high as 75°F if you live in the Northeast or Upper Midwest. For example, if a Minneapolis homeowner picks a system that will handle a Delta T of 75°F in the winter (45°F inlet to 120°F outlet) to meet the needs of a household that runs two showers simultaneously every weekday morning, this consumer need not worry about the summer, when the inlet temp should be 20°F to 25°F warmer.

Tank vs Tankless

More about Rheem Tankless Water Heaters

Rheem Tankless Gas Water Heaters

With today's rising energy costs and environmental awareness in mind, Rheem has met and exceeded the expectations of home and business owners for new water heating solutions. Welcome to Rheem tankless water heaters.

Rheem tankless water heaters combine new technology and functionality in an innovative way to heat water. The result - you now have a greater choice of award-winning Rheem products designed to give you comfort. Our tankless water heaters are designed to enhance your lifestyle, utilize advanced technology for energy efficiency, and supply a continuous flow of low cost hot water whenever and wherever you need it.

Since our tankless products only use energy to heat water as it is needed, no energy is wasted while there is no demand for hot water. In addition, our tankless products put you in complete control over your water temperature with a precise digital controller. A touch of your fingertip can adjust the maximum water temperature up or down to the perfect comfort level that's just right for you. Moms love this feature because it prevents water from getting too hot for their children. These features plus many more add up to pleasant lifestyle and considerable savings on your energy bill.

Features & Benefits

Continuous hot water on demand – Tankless water heaters provide a steady flow of hot water whenever and wherever you need it.
Compact, space saving design – Our indoor and outdoor tankless water heaters are just over 2 feet tall, weigh 75 pounds or less, and attach to an interior or exterior wall.
Energy Efficient – Rheem tankless gas water heaters are very energy efficient. To calculate your estimated energy, please visit our tankless energy savings calculator page.
Indoor and outdoor models available – with a variety of propane (LP) and natural gas models for added choice and convenience.
Condensing or Non-Condensing models – Rheem offers a variety of models that feature 94% efficient stainless steel condensing heat exchanger, and models that feature an 82% efficient copper heat exchanger.
Environmentally-friendly – Our tankless products meet low NOx emissions standards (SCAQMD rule 1146.2) because of their advanced operational design and high efficiency.
High altitude efficiency – Rheem offers unique technologies for efficient tankless water heater operation up to and above 9,000 feet.
Digital display – All Rheem tankless models have a digital display that show temperature setting and maintenance codes.
Remote controls – all tankless models include a digital remote control with a maximum temperature setting of 140 degrees F. All remote controls require 18 AWG, 2 conductor thermostat wire that is sold separately in a variety of lengths.
Additional remote controls – Additional bath remote controls are available for all tankless models. These additional remote controls add convenience to a whole home tankless system by enabling the user to change the output temperature of their water heater from multiple locations.
Worry-free operation – Our award-winning tankless designs feature exclusive safety features including: - built-in self-diagnostic program - advanced sensors that prevent overheating - automatic shut-off system in the event of an error.
Self-diagnostic program – Our tankless water heaters use smart technology. The built-in self-diagnostic program displays maintenance codes when necessary. In the event an error is detected in the tankless unit, an error code will be displayed on the digital controller for quick reference and troubleshooting.
Large hot water volumes – Rheem tankless water heaters can be combined in several combinations to accommodate any hot water need. All models are manifold capable (up to 20 units) with a modular controller. With Rheem's EZ-Link technology, 2 units may be combined using a single EZ-Link communication cable.
Commercial and Hydronic – Rheem tankless water heaters can be upgraded for high temperature (up to 185F) applications such as Commercial or in home heater with forced air hydronic air handlers.
Built-in electric blower and 120V power cord - Inclusive on all indoor models.
Stainless steel venting – Non-condensing models require manufacturer approved concentric stainless steel venting for safe, efficient operation and extended life. Standard water heater vent material is inadequate for safety reasons.
PVC venting – Rheem Condensing tankless water heater models can be vented with PVC or approved Polypropylene venting material
Patented Guardian OFW™ Overheat Film Wrap – Patented safety feature that offers unsurpassed protection in the event of a breach of the tankless water heater’s heat exchanger. This device consist of a polyethylene film wrap embedded with carbon trace resistor that is constantly monitored by the control board. The OFW surrounds the tankless water heater’s heat exchanger and allows Rheem to have the best clearance to combustibles in the industry, just ½” from the sides and 0” on the rear. No other tankless manufacture offers the degree of protection provided by the Rheem Guardian OFW ™.

Please note - Proper gas pressure and volume must be ensured to supply any tankless water heater. Rheem models feature capacities up to 199,900 BTU and reqiure a minimum gas line size of 3/4-inch. Retrofit applications may require upgrades to the gas supply lines.

Where to use Tankless

Whole Home Solutions

Every home is unique, and so are everyone's hot water needs. Regardless of your home size or hot water needs, an innovative Rheem tankless whole home system is ideal for providing low cost hot water whenever and wherever you need it. With today's rising energy costs, a whole home tankless system by Rheem is a smart choice for a wealth of reasons. If your home is located in a high altitude region, only Rheem tankless water heaters offer unique technologies for efficient operation up to and above 9,000 feet.

Simultaneous Hot Water Appliance Use

Rheem tankless models are designed to supply enough hot water to operate up to three appliances simultaneously for an extended period of time. Plus, our advanced technology and electronic controls are designed for trouble-free performance. That's just a couple of reasons why homeowners love our tankless water heaters.

Precise Water Temperature control

Each Rheem tankless model comes with a digitally controlled thermostat. A touch of your fingertip can adjust the maximum water temperature up or down to the perfect comfort level that's just right for you. Moms love this feature because it prevents water from getting too hot for their children.

Peace of Mind

By installing a Rheem tankless whole home water heating system, you are investing in a new generation of water heating technology designed to enhance your lifestyle, save energy, and provide worry-free operation. Rheem is known for reliable, quality products and outstanding customer support - giving you peace of mind in your water heating system. We offer a variety of tankless water heaters that can supply enough hot water for any whole home system. If you are interested in saving money while providing the comfort and convenience of continuous hot water for your family, please contact us today.

Renovations & Additions

If you or someone you know are planning to renovate a home or add a jetted tub, hot tub, multiple shower/body spray unit, or just another bathroom - more than likely there will be a need to upgrade the hot water supply. This can easily be accomplished with the installation of a sleek new Rheem tankless water heater. Our indoor or outdoor tankless models save ample space because of their simple design and compact size. If your home is located in a high altitude region, only Rheem tankless water heaters offer unique technologies for efficient operation up to and above 9,000 feet.

You'll love our tankless water heater for providing a continuous flow of low cost hot water for an extended period of time. Better yet, by choosing our innovative tankless water heater to supply your new addition, you will enjoy all the benefits from advancements that have been made in our award-winning water heating technology.

We offer a variety of tankless water heaters that can supply enough hot water for any renovation or home addition. If you are interested in enhancing your renovation or home addition with an energy efficient Rheem tankless water heater, please contact us today.

Vacation Homes

Ah, it's vacation time - time to head to your secluded beach home where you love to get away and play. Or, you may go to your cozy cabin in the mountains for a well deserved retreat. No matter where your vacation home is located, a Rheem tankless water heater is the wisest choice a smart investor could make for their hot water system.

Save space, time and money

Our indoor and outdoor tankless models save ample space because of their simple design and compact size. And because there is no storage tank associated with our tankless technology, you'll never have to wait for water to pre-heat before enjoying hot water upon your arrival. With an installed Rheem tankless system, you'll love the comfort of extended hot showers or long soothing hot baths at your leisure. Rheem's advanced tankless water heaters only use energy when there is a demand for hot water - so when you are away, there are no hot water bills to pay. Better yet, you will enjoy all the benefits from advancements that have been made in our award-winning water heating technology. We offer a variety of tankless water heaters that can supply enough hot water for any vacation home.

If your vacation home is in a high altitude region, only Rheem tankless water heaters offer unique technologies for efficient operation up to and above 9,000 feet. . If you are interested in investing in a cost saving, energy efficient hot water solution for your vacation home, please contact us today.

Business and Commercial

Need a space saving, energy efficient alternative for your business and commercial hot water needs? Then you need a tankless water heating system from Rheem.

Rheem tankless water heaters are truly unique because they deliver ample hot water (up to 185 degrees F) continuously for an extended period of time. Commercial applications requiring extra large volumes of tankless hot water will benefit from our exclusive manifold capabilities (up to 20 tankless units). Unlike other brands of tankless water heaters, our manifold capability is simplified by requiring only one modulating controller and one remote control. Plus, if your business is located in a high altitude region, only Rheem tankless water heaters offer unique technologies for efficient operation up to and above 9,000 feet.

Rheem's tankless water heaters can supply enough hot water for any commercial use, plus they qualify for federal tax credits for energy efficiency. If you are interested in saving money in hot water expenses for your business, please contact us today.

Solutions For Every Size Family & Budget

Defining a new standard in quality.