Worona Home Inspections
Worona Home Inspections
Gas-Fired and Electric Wired units.

Hot water tanks are a big issue. I am always asked the question; "How are the on-demand hot water heaters?". Truth is there are very few installed in our geographiocal location. Although used for the past 20+ years in Europe, they are just now becomiing popular in the U.S.

Can they save you time and money? Yes.

Are they expensive to install? Yes

Do they provide instant Hot water? Yes

Do they save money instantly and also over the age of the unit? Yes and Yes.

Some interesting things learned along the way.

On-demand hot water heaters (electric) require a huge surge of energy, as musch as 24 kilowatts, or about the same energy required to light 240 100-watt incandescent light bulbs. The units, if installed in homes in the same neighborhood, can also increase the energy load that exceeds the capabilities of neighborhoof transformers, requiring the utility to upgrade equipment. (fromGreen Builder Sept 2007 issue)

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The U.S Department of Energy gives the folowing data for energy savings:

Daily Heated Water Usage % more efficcient tha conventional water heating

86 Gallons
8% - 14%

41 Gallons
24% - 34%

Point-of-use units
27% - 50%

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Information below was obtained by Bosch, a Hot Water Tank company.

Q. What is a tankless water heater?
A. Most people in North America currently use a storage tank water heater to provide hot water in their homes. A storage tank water heater keeps water hot 24 hours a day, even while you’re at work or sleeping. A tankless water heater, on the other hand, does not store hot water. It heats the water as you use it.

Q. How can a tankless water heater heat water instantly?
A. When you open a faucet, the flow of the water triggers the heater to turn on. Whether you use gas or electricity, the powerful gas burners or electrical elements will turn on, rapidly heating the water as it passes through the unit. The water is heated instantly, and the time it takes to obtain hot water is directly related to the distance the hot water has to travel from the water heater to where hot water is being used. The burners or elements then shut down when you shut off the hot water. The energy that is consumed is only for the hot water that is being used.

Q. What are the advantages of using a tankless water heater?
A. Because a tankless water heater turns on when you open a hot water faucet and turns off when you close the faucet, the energy that is consumed is only for the hot water that is being used. Since there is no storage of water, and thus no constant heating and re-heating of stored water, you’re not wasting energy heating water when you don’t need it, such as when you’re sleeping or not at home. This energy savings translates to dollar savings for you and reduced impact on our environment. Furthermore, since a tankless water heater heats the water as you use it, you can have an endless supply of hot water, provided you size the unit appropriately (see our Sizing Guide to find the right model).

Q. How much money can I save?
A. Depending on which model of tankless water heater you purchase, and what size storage tank you have now, and if it runs on gas or electricity, you could save anywhere from 5% to 69% off your hot water heating bill. How? Most homes use hot water for a cumulative total of about one hour per day, yet they typically keep 40 or 50 gallons (oftentimes more) of water hot 24 hours a day. Having a system that eliminates the storage and heats water only as you use it can dramatically reduce your energy consumption.

Q. Can it really provide an endless supply of hot water?
A. Yes. Because storage tank water heaters store a finite amount of water, when that amount is used up your shower goes cold and you have to wait for the heater to heat the water back up (this is known as recovery time). Because a tankless water heater heats the water as it passes through the heater, you can never run out, provided flow limitations are not exceeded (see our Sizing Guide to find the right model for you).

Q. Are there other benefits of a tankless water heater?
A.
There are many advantages of having a tankless water heater in your home. Besides the money savings, endless hot water and smaller impact on the environment, a tankless water heater:

Is very small and can hang on the wall, thereby saving you valuable floor space.

Is designed with replaceable parts and is built with such materials as copper, stainless steel, and aluminum so as to last a lifetime. Energy savings is only one segment of savings—with proper care this could be the only water heater one needs in a lifetime.

Is almost entirely recyclable, so if you ever decide to replace it, it doesn’t have to go to the landfill.

Will not develop a corrosive leak like a storage tank water heater, saving you from expensive water damage in your home.
Note: A tankless water heater can leak if it is exposed to freezing temperatures or has a manufacturing defect.

Maintains its efficiency throughout the lifetime of the unit. Storage tank water heaters decrease in efficiency over time due to mineral build-up inside the tank. This is due to the fact that storage tank water heaters store hot water, giving those minerals a chance to settle out and bake from the heat onto the walls of the tank, and onto the heating element in electric models, thereby reducing heat transfer.

Q. Will one tankless water heater service my entire house?
A. Yes. You must choose the proper model to suit your home’s hot water needs, which is based upon the maximum flow of hot water you need at any one time (see Sizing Guide to choose the right model for you). We sell tankless water heaters that are capable of handling one shower at a time and others that can sustain a maximum of two showers operating at the same time.

Q. Is this a new technology?
A. No. Europe, Asia and South America, where energy costs are more expensive than here in North America, have been using tankless water heaters for 75 years. Bosch Water Heating has been selling and supporting tankless water heaters in the United States since 1979. However, most Americans are just now learning of this technology and its benefits.

Q. What is a point-of-use water heater?
A. A point-of-use water heater is a very small water heater, either a mini-storage tank or a small tankless model, that is designed to be installed at the point of use, thereby eliminating a long pipe run. They are mostly sized to supply hot water to one specific application, usually a sink. A common application is a remote sink, such as a bathroom in an office building or a service station. Another common application is for distant sinks in the home that typically take too long to receive hot water.

ENERGY SAVING CHARTS

Electric Units

Energy Factor Cost to Operate* Annual Savings¹ Annual Savings²
AE115 0.90 $478 $0 $22
AE125 0.94 $458 $20 $43
50-gallon tank 0.90 $478
80-gallon tank 0.86 $500

**The above charts represent approximate energy savings figures based on U.S. Dept. of Energy test method for water heaters. The energy costs used are the 2006 averages as published by DOE - $0.098/kWh.

Annual Savings¹ - Compared to a new 50-gallon storage tank with Energy Factor .90 (most popular model).
Annual Savings² - Compared to a new 80-gallon storage tank with Energy Factor .86 (most popular model).

Natural Gas

Model Energy Factor Cost to Operate* Annual Savings¹ Annual Savings²
2400E/EO 0.80 $250 $110 $151
1600P/PS and 125BO 0.69 $308 $52 $93
1600H 0.80 $266 $95 $135
125FX 0.78 $273 $88 $129
40-gallon tank 0.59 $361
75-gallon tank 0.53 $401

*The above charts represent approximate energy savings figures based on U.S. Dept. of Energy test method for water heaters. The energy costs used are the 2006 averages as published by DOE - $1.42/therm for natural gas and $1.95/gallon for propane.

Annual Savings¹ - Compared to a new 40-gallon tank water heater of the most popular model.
Annual Savings² - Compared to a new 75-gallon tank water heater of the most popular model.
On-demand hot water heater

Contact Us Today!

Worona Home Inspections
6735 Sodom Hutchings Rd

Girard, 44420


Phone: +1 330 330-539-0242 +1 330 330-539-0242

E-mail: worona58@yahoo.com

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