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Small Cars and Tankless Water Heaters - A Comparison

Feb 11, 2020
We are trying to "think green" and many of us are buying products that consume less energy. Are economy automobiles and tankless water heaters similar?

The ways in which consumers select them are similar and the answer is often "yes".

Why?

We are thinking of tankless heaters in respect to the fact that they use substantially less energy simply because they only use energy when they are making hot water. As tankless water heaters are sized by their abilities to raise the temperature of water and send it out of the heater in a specified gallons per minute capacity (Or liters per minute) they are a different concept than the typical tank type heater. Once a person determines the gallons per minute (GPM) that are needed for an application, a tankless heater can be selected. Tankless heaters come in many sizes and different types of design and construction.

Selecting a tankless heater is in some ways similar to buying a new car. Many people are looking at small cars because they consume less fuel for each mile driven. Maybe they are trading-in the "gas guzzler"? But certainly most people realize that they are reducing the size and power when they switch to a small car? For example; when one wants a car that gets tremendous miles per gallon, typically they have a very small engine and the car itself is also very small. As the horsepower and size are enlarged, then the economy goes down. This is the trade-off. Certainly one cannot expect a small inexpensive economy car to have comforts, space and performance of a much larger automobile. When one purchases an economy car they should realize that most are intended for commuting to and from work. When operating a small economy car while driving alone, the performance may in fact be impressive, but as passengers and materials are loaded into the interior, the weight increases and the performance rapidly drops. If a person takes the family and all their travelling necessities on vacation and expects to drive this little car across the continent in comfort, they are often disappointed.

The same basic rules apply to tankless heaters. Smaller ones can work well, but when they are tested to their capacity they sometimes disappoint the user. But this is the same for a tank-type heater as well. For example, a 40 gallon tank-type heater holds that water in reserve pre-heated. If a person uses three showers at once and each shower-head consumes 2 GPM, then there is a 6 GPM draw on the tank-type heater.. The math is simple, that big 40 gallon tank of water will be expended in only six and one half minutes! And you may have thought that your current 40 gallon heater was big! But use two showers and there is only a 4 GPM draw and the supply will last ten minutes. A 4 GPM tankless heater may in fact run two showers, but this depends upon the ground water temperature. As the way in which tankless heaters are sized also depends on how many degrees in "temperature rise" the heater must achieve. People who live in Northern climates (especially in the winter) receive less GPM from a tankless heater than those who live in Southern climates.

This is the way it is, but many may not realize that this rule applies to tank-type heaters as well. Even though a tank type heater must recover the full tank of water and reheat it to the desired temperature which takes time. The fact is that like a tankless heater, this older tank-type technology also changes the temperature from the incoming ground water and raises it to the pre-set desired temperature. And again, there is that same calculation of temperature rise. So, this means that people in Southern climates can expect that their tank-type heater will recover faster than those who live in the North. This is the reality and there is nothing that can change it. For this reason, the ground water temperature is a constant variable that must be considered for those who are shopping for any type of water heater.

What about this temperature rise thing, why is it important?

All manufacturers specify the capacity of their tankless heaters in GPMs with a specific temperature rise. Most companies use the "45 degree rise" calculation which makes the GPM number much higher. But the reality is that typical ground water temperature in the middle of the continent is 55 degrees. A 45 degree rise will only deliver 100 degree water to the user. As 105 degrees is considered comfortable for showering and 120 degrees is the typical desired temperature of users in North America. A 45 degree rise is usually insufficient. A 70 degree rise is more realistic but with this calculation the GPM capacity will be reduced substantially. (This is the reason that we have placed temperature rise and GPM charts on our website.)

What does all this really mean when I am shopping for a heater?

Once again we can take a lesson from the automobile manufacturers. A typical economy car may have a combined rating of 38 MPG city/highway. But we know that real world users rarely see numbers this high. Since this variable is industry wide, it can be assumed that all cars and trucks actually get lower miles per gallon than specified which makes things relatively equal.

If a person wants to buy a less expensive economy model tankless heater that produces GPMs close to the needs of the user, then it can be assumed that there will be times when the capacity is exceeded by unexpected demands or that it simply does not perform in the ways in which the buyer visualized. If an economy car is driven in the way in which it was designed and for the purpose intended, this economy car delivers the desired results. But it is not a large car capable of hauling large loads and delivering higher performance. After all, it is an "economy" car and it should be driven in an economical way. If a consumer really needs a large car because of passenger and load needs or wants high performance, then buying a small "econobox" car will only lead to occasional or possibly frequent disappointment. These same basic rules apply to any type of water heater, tank or tankless.

Elsewhere on our website we explain in detail the ways in which to select a model to fit your specific needs. We explain in detail how to measure the GPM needs, what are the parameters of installation and typical municipal, state and federal rules and regulations.
11 Feb, 2020
Unlike Europe and Asia, where tankless on-demand waterheaters are common, in the USA storage type units are prevalent. This type of technology is well developed, understood by most homeowners, but really quite wasteful. In today's world more people are making an effort to preserve our natural resources and conserve energy. Conventional tank type heaters are throw way appliances and their carcasses are clogging landfills nationwide.
11 Feb, 2020
Unlike Europe and Asia, where tankless on-demand water heaters are common, in the USA storage type units are prevalent. This type of technology is well developed, understood by most homeowners, but really quite wasteful. In today's world more people are making an effort to preserve our natural resources and conserve energy. Conventional tank type heaters are throw way appliances and their carcasses are clogging landfills nationwide. The average American household spends $400 to $600 per year for water heating, making water heating the second highest energy expenditure behind furnace and air conditioner operation. Today, after 100 years without change, North Americans are beginning to accept new water heater technology. The technology that is familiar to families in Europe, Asia, Central and South America seems new to the average American homeowner. In fact, this technology is now considered "mature". In comparison to conventional tank heaters, tankless models differ in the fact that they do not have a large water storage tank. In theory, on demand type instantaneous water heaters should be the best way to go since there is no energy wasted by heating a large tank of water for indefinite periods of time. These models supply instant hot water in a continuous supply as needed. Sensors turn on the instant heater when a hot water tap is opened, and the unit turns off when the faucet or shower head is closed and the flow of hot water stops. Save up to 50% energy usage with a tankless water heater When you talk about going Green and helping the environment why not save a little money in the process. Instant Tankless Water Heaters can save the average American family $108 a year (source: U.S. Department of Energy). Consider that hot water accounts for 30 percent of an average home's energy budget. Tankless water heaters provide an instant continuous flow of hot water as needed by utilizing a heat exchange coil and water flow switch, eliminating the standby energy loss of a conventional storage tank water heater. The U.S. Department of Energy stated that a gas fired tankless water heater is about 23 percent more efficient that a traditional storage version, which is constantly heating your water 24 hours, 7 days a week. This constant heating of water is called standby energy loss.
11 Feb, 2020
Several weeks ago we had the pleasure of talking to a Mr. Jorge Garcia-Bengochea. He came to us asking if we would be able to offer a tankless water heater for use by his charity service - Gentle Carousel. Gentle Carousel brings miniature therapy horses to hospitals, assisted living programs, hospice programs, programs for Alzheimer patients and to adults and children with disabilities so that they may experience a little extra joy in their life. The miniature horses of Gentle Carousel will visit upto 4000 adults and children every year. After hearing of the good work Mr. Garcia-Bengochea is doing, we were glad to offer a helping hand. We sent the Gentle Carousel an EZ 202 for use in their horse washing station. This is the card we received in response.
11 Feb, 2020
Every day someone contacts our company asking us for an electric tankless water heater. What we notice is one common misconception. Almost everyone inquiring about an electric tankless heater wants to install it as a replacement for an existing electric tank-type water heater. We have found that most people are visualizing that they simply mount the new electric tankless heater on the wall and plug it into the pre-existing wiring from their old tank type heater. This is simply not a correct assumption. For an electric tankless heater to supply hot water at the required GPM (Gallons Per Minute), a much larger amount of electricity is required. The amount of electricity required is huge when compared to typical appliances. In fact, an electric tankless hot water heater’s electricity requirements exceed the capacity of the typical American home. To find out the details, please read this report and comparison. We have taken the time to explain these energy consumption needs in an easy to understand way. Early in our research, we extensively evaluated electric tankless water heater technology and chose to focus our efforts on gas-fired models. We decided that our company would not enter into the business of electric tankless heaters for a number of reasons. Without turning this article into a sales pitch, we will point out some of the same facts that resulted in our company’s selection of gas fired heaters as our product line. Simply comparing our popular EZ DELUXE 4.0 GPM model to a similar but slightly smaller GPM capacity electric unit, one can clearly see the differences. (To be fair, we compare our EZ Deluxe to one slightly smaller and one slightly larger electric powered unit. The manufacturer’s specifications of the models used in this comparison are listed on their web site and we presume that they are accurate. However, we did not conduct tests on the specific electric models used in this specification comparison.) As previously mentioned, please keep in mind that not everyone lives in a modern newer home, older homes typically do not have 200-AMP and larger electrical services and modern expandable circuit breaker panels. In fact a 300-AMP service is rare in a residential application. Some older homes have only 100-AMP services and in fact some small rural homes may still be operating on 60-AMP services which were typical before the days of central air conditioning and multiple baths.
11 Feb, 2020
Recent studies show that 20% of energy consumed in a typical American home is from water heating demand. Switching to a tankless water heating system is proven to provide energy savings, lowering energy bills and reducing your carbon footprint. Many homes demonstrate energy cost savings of $150 per year on average. Proper Installation - We recommend you contact your local licensed plumber who is trained to handle electrical, gas, and plumbing and is aware of all gas fuel codes for a proper installation of the EZ Tankless water heater. Having a non-licensed professional install the unit can cause performance and operational issues. Location of Installation - Install on essentially any wall inside your home with our sleek and modern design. EZ Tankless offers a unit for every location. Venting - EZ Tankless offer the most economical and easiest to install systems on the market and we include the standard intake/exhaust components at no additional charge. Our tankless water heaters can vent vertically through the roof or horizontally through an exterior wall depending on the model. Gas Line Sizes and Fuel Types - EZ Tankless water heaters are designed to provide maximum performance and are available for natural gas or liquid or propane fuel types. The units operate using 1/2" or 3/4" gas line depending on BTU rating. Most of our homes units require 3/4” gas line. When choosing the model that suits your needs the best, ask these questions: Will I run out of hot water? Where can I install my hot water heater? Exterior wall? Interior wall? Central location? Do I have natural gas or propane?
11 Feb, 2020
Americans consume, it is what they do! Are American consumers really trying to reduce energy consumption, or is this just another false start like the oil crises' of the 1970s? We have all heard about the "American consumer". Why Americans are called "consumers" is simply because they consume everything they can find, and typically in a very big way. After all, consuming is the "American Way" and this includes oil, electricity, water, and natural gas. Often they consume in ways that are in fact shameful. But Americans don't care, they can consume as much as they want and nobody can do anything about that. It is the right to consume that drives the American economy. Or is it? With the $4.00 per gallon gasoline prices of 2008, Americans were suddenly dumping their big cars and SUVs and in a few months they had purchased millions of little automobiles with small fuel efficient engines. With a typical American knee-jerk reaction to high gasoline prices, Americans are buying these same little cars that people the world over have been using for decades. For more than half a century Europeans and Asians accept these same small cars as they have dense cities with not much available parking space and traditionally pay two or three times as much for gasoline than drivers in the USA. In late 2008 the U.S. Government instituted the "cash for clunkers" bill which paid new car buyers a discount at the dealership up to $4500.00 if they traded-in their gas guzzler for an economy model. This was designed to help the struggling auto industry and reduce the need for imported oil. So, what else is new on the energy saving subject? Tankless water heaters! The typical American will ask; what is a tankless water heater? Another way in which Americans waste energy is the ways in which they heat hot water. As usual, Americans have procrastinated until they are the last culture on earth to change their wasteful ways. Fifty years after Europe began to use tankless hot water heaters this technology has finally entered the minds of some American homeowners. After 100 years without change, Americans are slowly beginning to accept new energy efficient water heater technology. For America, today's flavor of the month is to "go green". This and a substantial tax credit for "green" devices are driving the rapidly expanding USA market for eco-friendly tankless water heaters. The large storage tank type water heater in the typical USA home is a big user of energy. The average American household spends $400 to $600 per year for water heating, making water heating the second highest energy expenditure behind furnace and air conditioner operation. Like the $4.00 per gallon gasoline prices of 2008, it seems that only a slap in the face can awaken the typical American from their wasteful ways. Again the U.S. Government steps in to stimulate (pay) Americans to reduce their energy consumption. This tax credit incentive took effect in February of 2009 and offered a substantial Federal Income tax credit to get the attention of the public and news media alike.
11 Feb, 2020
So maybe you have a flex-fuel or Gasoline-Electric hybrid vehicle in your driveway, maybe a compost pile in your back yard? You’ve insulated the house, installed the thermal-pane windows, and may even have a newer energy efficient furnace. Now that you are warm and cozy and “feeling the green” are you still heating a big tank of hot water 24/7/365? If it is a gas tank type heater, did you know that not only are you wasting gas by heating hot water constantly, but you are drawing heat from your home via the draft type exhaust pipe. Maybe you need a tankless hot water heater to complete your green home? “A gas-fired tankless water heater, what is that? Please tell me more?” In Europe and Asia tankless water heaters are the norm. In the United States, homeowners are more familiar with tank storage type water heaters. Today more and more families are making an effort to conserve energy and preserve our natural resources by switching to tankless technology. Primarily, tankless models differ from the typical large cylindrical heaters because they have no storage tank. On demand type, instantaneous tankless water heaters are better as no energy is wasted by pre-heating and holding a large quantity of water in reserve for future use. Tankless heaters produce almost instantaneous hot water in a continuous supply on demand. “How does a tankless heater work?” Sensors inside the heater detect that a hot water tap (faucet or shower) has been turned-on and the heater begins to run, making hot water that exits the heater into the hot water pipes leading to the faucet, sink, or shower. When the faucet or shower is turned off, the heater shuts down and the flow of hot water stops. Modern gas-fired tankless heaters don’t even have a pilot light! They have automatic electronic ignition to save even more energy. “So they save energy. Are they better than a tank-type water heater in other ways?” Tankless heaters can supply a larger total volume of hot water than a tank water heater. The reason is that a tank type heater has only a certain total capacity available. Tank type heaters are sized by their reserve hot water capacity in gallons. Typically only 30, 40 or 50 gallons of water is stored and if you exceed this capacity you must wait for another full tank to heat which can take several hours on some models. With a tankless heater, you have an endless supply of hot water for your needs. The way in which a tankless heater is sized is by its capacity to provide hot water at a specific GPM. In the USA, the volume of water flow is measured in GPM (Gallons per Minute) When a large volume of hot water is needed, more than one tankless heater can be joined together in a group and work in unison. For a tankless heater, the important thing to remember is how to properly size the tankless heater unit to the needs of the household or business in question by calculating your maximum peak GPM needs. “Please tell me more about GPM and how to properly size a tankless heater?” As previously mentioned, tankless water heater manufacturers size their heaters via GPM specifications. Often this is also included with fine print about the temperature rise. If your groundwater temperature is 45 degrees, and the manufacturer advertises that the heater can supply a temperature rise of 60 degrees at 4.0 GPM. What this means is that the output temperature of the water coming from the heater will be 105 degrees at a maximum flow of 4.0 Gallons Per minute. Tank type heaters are sold as total gallons held in reserve in the tank. For example, a typical tank type heater may hold forty gallons of water. Comparing a 4.0 GPM tankless water heater to a forty gallon tank type heater is possible. For example, if a tankless unit produces hot water at 4.0 gallons per minute, this rate of flow will run a 40 gallon tank type heater out of water in only ten minutes. “Please tell me about the latest evolution of tankless water heaters. Because several years ago, I was told they were not very good.” It is a fact that the early models of tankless heaters sold in the USA years ago were small and could not meet the needs of a typical household. (Especially the electric ones.) They were primitive and often broke down. Sometimes the homeowner had to wait for a visit by a qualified technician and then parts were needed and had to be ordered. Because of these experiences of years past, tankless heaters had developed a reputation for malfunctions and an inadequate supply of hot water. Today’s models are designed to last fifteen to twenty-five years, and are much more reliable. If the unit being installed is properly sized to meet the needs of the home or business, and properly maintained, it will supply reliable continuous hot water for many years to come. “Is there a down-side to a tankless water heater?” The biggest enemy of any water heating device is hard or sediment filled incoming water. (For example, as you may have experienced, this is the leading cause of failure in coffee makers) As with any type of water heater, the tankless varieties also work best when used with a water softener or at the very least a filter installed on the incoming water supply. Just like a tank type heater, manufacturers of tankless models recommend diligence in performing periodic flushing and internal cleaning as recommended. The interval period for this maintenance depends on the hardness of the water and the type of filtering and/or treatment being done to the incoming water. Learn more about properly maintaining a tankless water heater. In addition, households with well water will need to address the need for a more constant water pressure. Well pumps cause fluctuations in pressure that can confuse the internal control devices of a modern tankless heater. Find out more about using a tankless water heater with well water. “I have been told that the exhaust for a tankless water heater is special. Is this true?” The exhaust on a tankless heater is much different. Most of today's models use forced-air ventilation or are direct vent. (Direct vent is also known as "balanced" or "dual chamber" exhaust-intake) Because of much higher exhaust temperatures, stainless steel pipe designed for this purpose is always used. This is an important part of any indoor installation and is a requirement of industrial, local and national safety codes. This type of pipe has special sealed joints. This pipe is not the same as normal water heater or furnace exhaust pipe and the components do not interchange. With this type of exhaust the gasses are forced outside under pressure, not by a natural updraft as in a tank type heater. American homeowners are now accepting tankless water heaters as the wave of the future. The average American homeowner is just now finding out about this technology when in fact, people in other countries around the world know of no other way to heat water. “If I buy one now, will it be obsolete in only a few years?” More than ninety percent of the manufacturers of tankless water heaters are based in Asia. These heaters are built in modern new factories operated by companies that have been building millions of tankless heaters for decades. At this time, it is our understanding that there are no gas-fired tankless heaters produced in North America This is not new technology, it seems new to the typical USA homeowner because we are just now becoming aware of how much energy they save. These days, as a society we are beginning to change our wasteful ways and try to save energy. But as a homeowner, we are not only trying to save energy, but to also reduce our energy expenses as well. These new modern direct vent tankless water heaters have evolved to the point where the USA federal government has declared this technology "mature". What this means is that little future change is expected in these devices. They have reached a level of development where they are about as energy efficient as they can be and the design seems to have peaked as well. In fact, generally speaking most direct-vent heaters from all manufacturers are basically the same design. And in fact, some of the big-box home improvement chain stores are selling tankless water heaters under several different brand names that are in fact identical and produced in the same Asian factories. For some popular models, only the labels, brand names, and retail outlets differ.
11 Feb, 2020
A brief explanation of soldering pipe for a tankless water heater installation. Jesse Wellenstein was a professional trials bike rider sponsored by EZ Tankless co-founder Jim Snell and his company, Rising Sun Imports, Inc. After winning a couple national championships and still not gaining the popularity one would expect, Jesse retired to plumbing in his home state of Illinois. In this video Jesse demonstrates the proper method for soldering copper pipe pieces together. If you pay enough attention, you can also learn to make a set of your own tankless water heater service valves. -- The EZ Tankless Team Video shot were taken 09-26-2009
11 Feb, 2020
The guys at EZ Tankless would like to introduce you to the new EZ 202! The EZ 202
11 Feb, 2020
Mike from EZ Tankless discusses how to flush your tankless water heater with the help of service valves. Flushing your tankless water heater is the most important maintenance practice for keeping your tankless water heater in running order. Flushing your heater can expand its lifespan by many years, and in some cases can help your heater to last a lifetime. In this video we demonstrate how to flush your tankless water heater with the help of tankless water heater service valves. These valves are available from our website, your local major hardware store, or you can build them yourself. You can flush your heater without the use of a valve set but it will require disconnecting water to your unit, which in some cases can be more of a burden then the extra money for the service valves. -- The EZ Tankless Team Video shots were taken 10-01-2009
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