How To Shutdown A Rheem Water Heater For Repairs

Recall About Replacement Now

If you're similar virtually people, yous're unlikely to exit looking for a water heater until your existing one fails. That will happen at the worst possible time — like just later on guests arrive for a calendar week-long visit. You'll have to rush out and put in whatever is available, without taking the fourth dimension to expect for a h2o heater that best fits your needs and offers existent energy efficiency. A much improve arroyo is to practise some research now.

Explore the options and decide what blazon of water heater you want — gas or electric, storage or demand, stand-alone or integrated with your heating organisation, etc. Figure out the proper size for your household, not just in terms of gallon chapters, but first-hour rating as well. This is peculiarly of import with newer energy-efficient technologies. (See "Sizing Your Water Heater.")

If possible, replace your existing water heater before it fails. Most water heaters have a lifespan of 10–15 years. If yours is upwardly there in age, accept your plumber accept a look at it and advise yous on how much useful life it has left. If it's in bad shape, replace information technology now earlier it starts leaking or the burner stops working. In fact, information technology often makes sense to replace an inefficient water heater even if it's in skillful shape. The energy savings solitary could pay for the new water heater after only a few years, and you'll be happy knowing that yous are dumping fewer pollutants into the air and less coin down the drain.

Selecting a New H2o Heater

Whether you're replacing a worn-out existing water heater or looking for the best model for a new house y'all're building, choose carefully. Expect for a water heater that satisfies your hot water needs and uses every bit little free energy as possible. Ofttimes yous tin can substantially reduce your hot water needs through water conservation efforts (run into "Conserve H2o").

Storage Water Heaters

Storage h2o heaters are past far the most mutual type of water heater in use in the U.S. today. Ranging in size from 20 to lxxx gallons (or larger) and fueled by electricity, natural gas, propane, or oil, storage h2o heaters work by heating water in an insulated tank. When you turn on the hot water tap, hot water is pulled out of the top of the water heater and cold water flows into the bottom to replace it. The hot water is always there, prepare for use. Considering heat is lost through the walls of the storage tank (standby heat losses) and in the pipes after y'all've turned the faucet off (distribution losses), free energy is consumed even when no hot h2o is being used. New energy-efficient storage water heaters incorporate higher levels of insulation effectually the tank to reduce this standby heat loss. Every bit for distribution losses— a problem common to all types of water heaters, look in the department on "Upgrading Your Existing Water Heater" for tips.

Efficiency and tank size. The free energy efficiency of a storage h2o heater is indicated past its free energy gene (EF), an overall measure of efficiency based on the assumed use of 64 gallons of hot water per day, regardless of tank size. The first national appliance efficiency standards for water heaters took outcome in 1990. Updated standards, effective in 2015, are summarized in Table 6.1.

In a conventional gas storage water heater, less than 50% of the fuel energy reaches the point of use. New efficient water heaters can help reduce this excess heat loss.

Table half dozen.1 Federal Requirements for Storage Water Heaters

Tank Size	Gas*	Oil*	Electric*
30	.63	.62	.95
twoscore	.62	.60	.95
50	.60	.59	.95
60	.75	.57	2.00

*Minimum Energy Cistron (EF) as of 2015

All other things being equal, the smaller the water heater tank, the higher the efficiency rating. Compared to small tanks, large tanks take a greater surface expanse, which increases estrus loss from the tank and decreases the energy efficiency somewhat, equally mentioned higher up. If your utility company offers off-peak electrical rates and you'd similar to use them, you may need to buy a larger water heater to provide carry-over hot water for periods when electricity is not available nether this "tariff."

The most efficient conventional gas-fired storage water heaters are Free energy STAR models with energy factors between 0.67 and 0.seventy, corresponding to estimated gas use of 214 to 230 therms/year. No residential-rated condensing water heaters (free energy factors 0.80 or higher) are yet available, only small-scale commercial-rated models are marketed for residential employ. These have input capacity greater than 75,000 British thermal unit per hour (Btuh). Look for the "thermal efficiency" rating rather than EF, with values of 0.90 and above.

The minimum efficiency of electric resistance storage water heaters is virtually 0.90 (depending on tank book), and the all-time available are 0.95 EF. We do not recommend the use of electric resistance h2o heaters due to the high operating costs. A new electric water heater uses about 10 times more electricity than an average new refrigerator! Fortunately, rut pump water heaters using less than one-half every bit much electricity as conventional electric resistance h2o heaters are now bachelor from several manufacturers—utilise the Enervee Score or check the ENERGY STAR lists for detailed information. If you use electricity for water heating, consider installing a heat pump h2o heater. Expect at how the costs compare over the life of a standard h2o heater in "Comparing the True Price of Water Heaters."

Sealed combustion . For safety concerns equally well every bit free energy efficiency, look for gas-fired water heater units with sealed combustion or power venting. Sealed combustion (or "directly vent") is a two-pipe system — one pipe brings outside air directly to the water heater; and the 2d piping exhausts combustion gases directly to the outside. This completely separates combustion air from house air. Power-vented units use a fan to pull (or push) air through the h2o heater — cooled combustion gases are vented to the outside, typically through a side-of-the-business firm vent. Power-direct vent units combine a two-pipe organisation with a fan to help in exhausting combustion gases.

In very tight houses, cartoon combustion air from the firm and passively venting flue gases upwards the chimney can sometimes result in lower air pressure inside the house (meet Building Envelope). In turn, this tin can lead to "backdrafting," a state of affairs when the air pressure inside is so depression that the chimney airflow reverses and dangerous combustion gases are drawn into the house.

Need Water Heaters

Demand or instantaneous water heaters exercise not take a storage tank. A gas burner or electric element heats water only when in that location is a demand. Hot water never runs out, just the period charge per unit (gallons of hot water per infinitesimal [gpm]) may be express. By minimizing standby losses from the tank, energy consumption can exist reduced past x–fifteen%. Before buying a need water heater, though, exist aware that they aren't appropriate for every situation.

The largest readily available gas-fired demand water heaters can supply about 5 gallons of hot water per minute with a temperature rise of 77°F (58° to 135°F, for example). 77°F is the basis for industry calculations. This would support two simultaneous showers, or a bit more if the hot h2o is "mixed downwardly" with a lot of cold h2o. If you lot've installed a low-menstruum showerhead (see "Conserve Water" beneath) and won't need to practise a load of laundry or dishes while someone is taking a shower, then 4–five gpm might be fine. Simply if you accept a couple of teenagers in the firm, or if you need hot water for several tasks, a demand water heater might require staging some uses.

Newer instantaneous gas water heaters modulate their output over a wide range; typical outputs might range from 15,000 to 180,000 Btuh—a 12:1 range in hot water output, depending on demand (washing easily versus filling a clothes washer). This is an comeback over earlier models. However, there are even so some significant issues with tankless h2o heaters. First, they have a minimum water flow rate of 0.5 to 0.75 gallons/infinitesimal, and turn off or don't starting time at the lower flow rates used for manus washing and like tasks. In some situations, this tin lead to "cold water plugs" in the hot water supply lines, which leads to alternating delivery of hot and cold water — non regarded equally a comfortable way to shower! They also crave regular maintenance, and performance in hard water areas is non well studied.

Electric demand h2o heaters provide less hot water. A standard size model requires about 11 kW per gpm to achieve a 77º F temperature rising. Large units may require 40 to 60 amps at 220 volts, beyond the wired capacity of conventional houses. If you want to consider an electrical unit, brand certain your electrical wiring tin can handle the job before you make a purchase. Nonetheless, a small electric demand unit might make good sense in an addition or remote area of the house, thereby eliminating the heat losses through the hot water pipes to that surface area. These losses often account for a large percent of the energy wasted in water heating, regardless of the engineering science of the water heater. If you're using energy to heat water that has to make information technology a hundred anxiety beyond the house, a small electric demand water heater placed under the sink to boost the temperature of incoming water locally may exist a skillful idea.

Demand water heaters make the almost sense in homes with one or two occupants, and in households with small and easily coordinated hot water requirements. Without modulating temperature command (above), you lot and your family may observe yourselves unhappy with fluctuating h2o temperatures — specially if you have your own well water system with varying pressure level.

With gas-fired demand water heaters, keep in mind that a pilot light can waste matter a lot of energy. In gas storage water heaters, energy from the pilot light is not all wasted because information technology heats the h2o in the tank. This is not the case with demand water heaters. A 500 Btuh pilot lite can swallow twenty therms of gas per yr, offsetting some of the savings you achieve past eliminating standby losses of a storage water heater. To solve this problem, you lot can keep the pilot light off virtually of the time, and turn it on when y'all demand hot h2o — a routine that should work fine in a vacation home, but not in a regular household. Among new demand h2o heaters sold in the United States, continuing pilots have become very rare as most all models use electronic ignition.

Manufacturers provide unlike specifications for demand water heaters: energy input (Btuh for gas, kilowatts [kW] for electric); temperature rise doable at the rated menstruation; flow rate at the listed temperature rising; minimum menstruation charge per unit required to burn down the heating elements; availability of a modulating temperature command; and maximum water pressure. In comparing unlike models, be enlightened that you lot aren't always looking at directly comparisons, especially with temperature rise and flow rate. For case, while 1 model might list the menstruum charge per unit at a 100°F temperature ascension, another might list the flow rate at seventy°. Until there are manufacture-standard ratings for temperature rise and menstruation rates, it volition be difficult to compare the performance of products from different companies. Many manufacturers at present publish free energy cistron ratings for these products, and this information should brand for easier comparisons. If you cull a tankless unit of measurement, look for one with EF 0.eight (gas).

What's a Tankless Curlicue?

Do not misfile a tankless coil with a tankless water heater or an indirect h2o heater. Tankless coils employ the home's existing boiler — they are near mutual with older boilers — as the rut source for water heating with no storage tank. When hot h2o is fatigued from the tap, the water circulates through a heat exchanger in the banality. Tankless coils work great every bit long as the banality is running regularly (during the winter months), but during summertime, jump, and fall, the boiler has to cycle on and off frequently, wasting a lot of energy. Instead, ACEEE recommends an "indirect" tank-type storage h2o heater, or a free-standing storage water heater.

Ready to Buy? Bank check out the Enervee Marketplace. ACEEE'south partner, Enervee, makes information technology simple to notice the best deals from your favorite retailers on the most energy efficient electrical and gas h2o heaters that meet your needs.

Visit Free energy STAR for a full listing of qualified models.

The Air conditioning, Heating, and Refrigeration Institute lists high-efficiency h2o heaters on their website.

Advanced Water Heating Systems

Some of the most efficient water heaters find creative sources of estrus— such as other heating equipment, outside air, or the sun — to provide hot water with less fuel. These include rut pump water heaters, indirect water heaters, integrated infinite/water heaters, and solar water heaters.

Estrus pump water heaters. More efficient than electrical resistance models, heat pump water heaters use electricity to move estrus from one place to another rather than generating the heat directly (see discussion on estrus pumps in Heating and in Cooling). The heat source is outside air or air in the room where the unit is located. Refrigerant fluid and a compressor are used to transfer estrus into an insulated storage tank. While the efficiency is higher, and then is the cost to purchase and maintain these units. Heat pump water heaters are available with congenital-in water tanks called integral units, or equally add-ons to existing electric resistance hot water tanks. A heat pump water heater uses ane-third to one-half as much electricity as a conventional electric resistance water heater. In warm climates they may exercise even better.

Households using electric h2o heating and a heat pump for space conditioning can reduce water heating costs past installing a "hybrid" estrus pump organisation. Fully integrated unmarried-unit of measurement systems are one option, or an existing heat pump and storage water heater can be retrofit with a specially designed add-on heat pump water heater module. Hybrid air- and ground-source estrus pump systems are bachelor.

Hybrid gas water heaters. Broadly speaking, the term refers to h2o heaters with more than 2 gallons storage, but less storage than expected from output capacity. They feature a condensing burner smaller than used on whole-house tankless units and enough storage to take high first hour ratings. The smaller burner means they generally will not require new gas lines for retrofit installations. Because the burner is > 75,000 Btuh, they will be classed and rated every bit commercial products, although marketed for residential utilise.

Indirect h2o heaters. Indirect water heaters generally employ the habitation's boiler as the heat source, circulating h2o from the boiler through a estrus exchanger in a carve up insulated tank. Since hot h2o is stored in an insulated storage tank, the boiler does not have to plough on and off as frequently, improving its fuel economy. Electronic controls determine when water in the tank falls below a preset temperature and trigger the banality to rut the water as long equally needed. The more sophisticated of these systems rely on a oestrus purge wheel to circulate leftover heat remaining in the heat exchanger into the water storage tank later the boiler shuts down, thereby farther improving overall system efficiency.

Indirect water heaters, when used in combination with new high-efficiency boilers, are usually the least expensive mode to provide hot water (see "Comparing the True Costs of Water Heaters"). These systems can be purchased in an integrated form, incorporating the boiler and water heater with controls, or as split components. Gas-, oil-, and propane-fired systems are available. Whatsoever form of hydronic space heating — hydronic baseboards, radiators, or radiant heat — can exist provided past boiler systems.

Integrated "combi" water heaters. If you lot're edifice a new dwelling or upgrading your heating system at the aforementioned time y'all're choosing a new water heater, you lot might consider a combination water heater and space heating organization. These systems, also chosen dual integrated appliances, put water heating and space heating functions in i package. Space heating is provided via warm-air distribution.

The efficiency of a combination water heater with integrated space heating is given by its combined annual efficiency, which is based on the AFUE of the space heating component and the free energy cistron of the water heating component. Look for combined almanac efficiencies of 0.85 (85%) or higher.

Combination appliances feature a powerful water heater, with space heating provided as the supplemental end-employ. Heated water from the water heater tank passes through a heat exchanger in a central air handler to oestrus air. The fan blows this heated air into the ducts to estrus the dwelling house. Many combination systems of this blazon are available at depression initial costs, simply space and h2o heating efficiency is often less than that of conventional systems. Models incorporating a loftier-efficiency condensing water heater, such as the Polaris® past American Water Heater, are exceptions. These models realize efficiency gains over traditional equipment, at 90% combined efficiency. Another approach, introduced in the U.S. by Rheem, uses a tankless water heater every bit the "engine" for both space heating and hot h2o.

As you may have guessed, proper sizing of a combination apparatus is very important for economical functioning, since both space heating and water heating are given from i "box." Product manufacturers should be able to identify your local distributors and contractors who are familiar with these products and their installation.

Solar water heaters. Equally the proper name implies, these apply energy from the sunday to heat water, or help heat water. Solar h2o heaters can be a great investment considering they offer a almost cost-gratis and renewable energy source for i of your home'south summit free energy users. But because the feasibility and benefits of a solar water heater will vary based on variables such as where you live, which fashion your roof is facing, and how many people live in your business firm, information technology takes some extra savvy to know what your costs and savings volition exist.

A solar water heater consists of a solar thermal collector attached to a south-facing sloped roof or wall, a well-insulated storage tank, and a fluid organization that connects the 2. It is usually preferable to utilize a ii-tank arrangement in which the solar water heater circulates h2o through the collectors and back into a separate tank that and then "preheats" the conventional water heater. The distance between the collector and the tank, or the amount of finished space the loop must traverse in a retrofit installation, impacts the method and toll of installation.

Solar collectors tin can consist of an insulated glass box with a flat metallic plate cushion that is painted blackness, or a set up of parallel glass-encased metal tubes that blot solar heat. Some collectors use a parabolic mirror to concentrate sunlight onto the tube. A fluid circulates between the solar collector and the tank either using a pump (active arrangement) or natural convection (passive system). The most important difference among solar water heaters is the system's ability to resist freezing. If temperatures rarely become below freezing, water tin can circulate freely from the collector to the tank (open-loop system). But usually, it is safest to circulate some other freeze-resistant fluid through the collector and transfer the heat to water using a heat exchanger in the tank (closed-loop system). An culling strategy, which is simpler and often cheaper, is the "drainback" arrangement, which is like an open up system except it allows water to render to the tank as soon as the pump shuts off.

Solar water heaters are less mutual than they were during the 1970s and early 1980s when they were supported by early tax credits, but the units available today tend to be considerably less expensive and more than reliable. The initial cost of a solar water heater is nonetheless much higher than other competing technologies, simply if you can make the upfront investment, it can save 50–75% of your water heating energy over the long term in nigh climates. For example, in New England it is possible to accept a complete system that will provide one-half of the hot water requirements for a typical family of four for effectually $five,000 installed. In most areas of the country, you will pay back the total price of the solar water heater over the course of its life. So it usually depends on whether you have the money and involvement to brand the upfront investment. Meet how a solar water heater stacks up against other technologies over its life cycle in Table vi.ii.

Installation price in your area may vary. Areas that receive dominicus consistently for 3 or more than seasons will non only salve more free energy, but consumers are likely to have more products to choose from at lower costs. Plus, new federal revenue enhancement credits (set to run through 2016) coupled with country-level incentives available in a number of jurisdictions present additional incentives for purchasing solar water heaters.

To see whether incentives for solar technologies are offered in your state, contact the Solar Energy Industries Clan.

For a list of manufacturers in your surface area, check with the Solar Rating and Certification Corporation.

Also cheque the Florida Solar Energy Center for a list of rated loftier-quality solar water heaters.

If you are building a new firm, it is to your reward to have a south-sloping roof for easier installation of a solar h2o heater. At low toll, yous tin can have the best identify "pre-plumbed" or "roughed-in" so "dry" pipes are in identify if you after want to install a solar water heater.

If you take extra money to invest now and want to practice more for the environment, a solar water heater tin can be a skillful choice in nearly areas today. But make certain you notice a qualified installer who can properly blueprint and size the back-up water heating system. Solar h2o heaters can exist particularly effective if they are designed for iii-season utilize, with your heating organization providing hot water during the winter months.

Country of the Fine art Water Heating

On-demand recirculation systems eliminate the free energy, time, and water wasted when waiting for hot water to achieve the faucet. The all-time systems add a connecting loop, a pump, and a controller between the hot and cold water lines at the furthest fixture from the water heater. When activated by the button of a push, a pump quickly circulates hot water to the fixture, and the roomtemperature water in the pipes is returned to the water heater. These systems are relatively easy do-it-yourself installations. Available products include the Human action Metlund® D'Mand® and Taco D'Mand® Systems.

Solar-powered circulators are available for solar water heaters — in one case you're using solar power for water heating, why non besides supplement the electricity needed to run the organisation? These are bachelor from several manufacturers. If you are considering a solar water heater, enquire your installer well-nigh this option. Drainwater recovery devices can be installed in the drainage lines beneath showers and other hot water uses to recapture some of the heat returning to the pipe and transfer information technology back to the h2o heater. The most common example of this type of product is the GFX (gravity picture show exchange) by Doucette Industries.

Pocket-sized-diameter and "Home Run" pipe systems are gaining popularity as an alternative to traditional copper pipage. Instead of having a single wide-bore piping that branches off to different cease-uses, individual polyethylene (PEX) tubes are run from a cardinal manifold to each end-apply. Fewer fittings and elbows reduce friction and look time. Learn more at PPFA.

Comparison the True Costs of H2o Heaters

At that place are a number of important considerations when deciding what type of water heater you should buy: fuel blazon, efficiency, configuration (storage, need, combination), size, and cost. The information above covers virtually of these issues. Cost, yet, needs some additional discussion. There are really 2 costs yous need to look at: purchase toll and operating cost.

Information technology may exist tempting when you're buying a water heater but to await for a model that is inexpensive to buy, and ignore the operating cost. This grade is penny-wise and pound-foolish. Often, the to the lowest degree expensive water heaters upfront are the almost expensive to operate over the long run. Life-cycle costs, which accept into account both the initial costs and operating costs of different h2o heaters, provide a much more costs for the well-nigh common types of water heaters under typical operating atmospheric condition are shown in this table.

Life-Cycle Costs for 13-Twelvemonth Functioning of Different Types of H2o Heaters

Water heater type	Storage Volume (Gallons)	Efficiency(one) (EF)	Price (1)	Yearly energy price (ii)	Life (years)	Cost over 13 years (3)
Conventional gas storage	forty	0.60	$850	$350	xiii	$5,394
Loftier-efficiency gas storage	twoscore	0.65	$1,025	$323	13	$five,220
Condensing gas storage	l	0.80	$2,000	$262	xiii	$5,408
Conventional oil-fired storage	xxx	0.55	$i,400	$654	eight	$eleven,299
Minimum Efficiency electric storage	50	0.90	$750	$463	13	$6,769
Loftier-eff. electrical storage	50	0.95	$820	$439	13	$half-dozen,528
Demand gas (no pilot)	<two	0.82	$i,600	$228	13	$4,560
Electric heat pump water heater	fifty	two.20	$1,660	$190	thirteen	$4,125
Solar with electric back-up	n/a	ane.20	$4,800	$175	xx	$seven,072

(one) Costs are crude estimates, including installation, based on internal and other surveys.
(two) Based on hot water needs for typical family of four and energy costs of 9.5¢/kWh for electricity, $1.forty/therm for gas, and $2.twoscore/gallon for oil.

From the tabular array, we see that when both buy and operating costs are taken into account, one of the to the lowest degree expensive systems to purchase (conventional electric storage) is ane of the most costly to operate over its expected 13-twelvemonth life. An electric heat pump h2o heater, though expensive to purchase, has a much lower price over the long term. A solar h2o heating system, which costs the virtually to buy, has the lowest yearly operating cost among electric systems.

Sizing Your Water Heater

To determine how big a storage water heater you need, you lot should first gauge your family's peak-60 minutes need. To do this, estimate what fourth dimension of mean solar day (morning or evening) your family is likely to require the greatest amount of hot h2o. So calculate the maximum expected hot water demand using Table vi.three. Annotation that this does not provide an judge of your family's total daily utilise, only the pinnacle hourly use. Also, the values in this table do not consider water conservation measures, like water-saving showerheads and faucet aerators that can reduce hot water use for each activity. If you lot have a new domicile, have upgraded to water-saving fixtures, or installed an Free energy STAR clothes washer or dishwasher, your superlative demand volition exist lower.

The ability of a h2o heater to come across peak demands for hot water is indicated by its first-hour rating. This rating accounts for the effects of tank size and how speedily cold water is heated. In some cases, a water heater with a small-scale tank but powerful burner can take a higher first-hour rating than i with a large tank and less powerful burner. Ask appliance dealers for the showtime-hour ratings of appliances they sell or check the manufacturer'due south literature.

Ownership besides large a storage h2o heater will reduce energy performance by increasing the standby losses. If gas- or oil-fired, larger systems will also lose more heat up the flue. Demand h2o heaters should be sized according to the required gpm flow rate and temperature rise during the winter required for your largest expected hot water fixture (usually a shower). (See "Demand Water Heaters.")

With solar h2o heaters, you should discuss your requirements carefully with the solar water heating salesperson. You will demand to size both the solar hot water system itself and the back-up electrical or gas water heater. It generally makes the most sense to size a solar water heater to provide almost all of the hot water needed during a peak summer day. This is economically sound, but will require supplemental water heating in other seasons and on cloudy days.

Installing a H2o Heater

Select an installation contractor carefully. Make sure that he or she has experience with the type of organization you want to install. If the system is integrated with your heating organisation, have your heating contractor put in the water heater. To go a expert value, ask for bids from several contractors and evaluate the bids carefully. Consider warranties, service, and reputation likewise every bit the toll.

Storage water heaters will lose less rut if they are located in a relatively warm area. Also try to minimize the length of pipe runs to your kitchen and bathrooms. The best location is a centralized one, non too far from any of your hot water taps.

When the water heater is being installed, make sure heat traps or i-way valves are installed on both the hot and common cold h2o lines to cut down on losses through the pipes. Without rut traps, hot h2o rises and common cold water falls within the pipes, allowing heat from the water heater to exist lost to the environs. Heat traps cost around $xxx and volition relieve $15–30 per year. Some new h2o heaters have congenital-in heat traps. If heat traps are not installed, you should insulate several feet of the cold water pipe closest to the water heater in add-on to the hot water pipes. Fifty-fifty with heat traps, insulate the cold water line between the water tank and heat trap.