Water heating is a thermodynamic process that uses an energy source to heat water above its initial temperature. Typical domestic uses of hot water include cooking, cleaning, bathing, and space heating. In industry, hot water and water heated to steam have many uses.

Domestically, water is traditionally heated in vessels known as water heaters, kettles, cauldrons, pots, or coppers. These metal vessels that heat a batch of water do not produce a continual supply of heated water at a preset temperature. Rarely, hot water occurs naturally, usually from natural hot springs. The temperature varies based on the consumption rate, becoming cooler as flow increases.

Appliances that provide a continual supply of hot water are called water heaters, hot water heaters, hot water tanks, boilers, heat exchangers, geysers, or calorifiers. These names depend on region, and whether they heat potable or non-potable water, are in domestic or industrial use, and their energy source. In domestic installations, potable water heated for uses other than space heating is also called domestic hot water (DHW).

Fossil fuels (natural gas, liquefied petroleum gas, oil), or solid fuels are commonly used for heating water. These may be consumed directly or may produce electricity that, in turn, heats water. Electricity to heat water may also come from any other electrical source, such as nuclear power or renewable energy. Alternative energy such as solar energy, heat pumps, hot water heat recycling, and geothermal heating can also heat water, often in combination with backup systems powered by fossil fuels or electricity.

Densely-populated urban areas of some countries provide district heating of hot water. This is especially the case in Scandinavia and Finland. District heating systems supply energy for water heating and space heating from waste heat from industries, power plants, incinerators, geothermal heating, and central solar heating. Actual heating of tap water is performed in heat exchangers at the consumers' premises. Generally the consumer has no in-building backup system, due to the expected high availability of district heating systems.

Hot water used for space heating may be heated by fossil fuels in a boiler, while potable water may be heated in a separate appliance. This is common practice in the US, especially when warm-air space heating is usually employed.[1]

In household and commercial usage, most North American water heaters have traditionally been the tank type. Also called storage water heaters, these consist of a cylindrical vessel or container that keeps water continuously hot and ready to use. Typical sizes for household use range from 75 to 400 litres (20 to 100 US gallons). These may use electricity, natural gas, propane, heating oil, solar, or other energy sources. Natural gas heaters are most popular in the US and most European countries, since the gas is often conveniently piped throughout cities and towns and currently is the cheapest to use.

Another popular arrangement where higher flow rates are required for limited periods is to heat water in a pressure vessel that can withstand a hydrostatic pressure close to that of the incoming mains supply. In North America, these vessels are called hot water tanks, and may incorporate an electrical resistance heater, an air source heat pump, or a gas or oil burner that heats water directly.

Where hot-water space heating boilers are installed, DHW cylinders are usually heated indirectly by primary water from the boiler, or by an electric immersion heater (often as backup to the boiler). In the UK these vessels are called unvented cylinders. In the US, when connected to a boiler they are called indirect-fired water heaters.

Compared to tankless heaters, storage water heaters have the advantage of using energy (gas or electricity) at a relatively slow rate, storing the heat for later use. The disadvantage is that over time, the water inside the tank will cool down causing the heating system to activate to heat the water back up. Additionally, once the tank's supply of hot water has been exhausted, there is a significant delay before hot water is available again. Larger tanks tend to provide hot water with less temperature fluctuation at moderate flow rates.

More:
Water heating - Wikipedia, the free encyclopedia

If you need to replace or repair your water heater, The Home Depot can offer same-day service (in most areas) if you contact us before noon. And you can depend on The Home Depot, as we handpick installers and home service professionals who meet the highest standards for experience, know-how and customer service to get your water heater installation or water heater repair done right the first time. We screen and background check all of our service providers before we hire them to ensure we're sending the safest, most experienced providers to your home and that they have all applicable licenses and insurance.

During our FREE consultation, we'll assess which water heater system best fits your family's needs. Then, we become your one-stop shop, taking care of delivery, installation, permits and FREE disposal of your existing hot water heater whether you choose a conventional storage tank or a tankless water heater. We safely install gas water heaters, electric water heaters and tankless water heaters, ensuring all are up to code.

The Home Depot also has credit and/or project loan financing options and extended protection plans in addition to your tank's manufacturer's warranty. When you hire The Home Depot for your water heater installation, you know we'll get the job done right and stand behind our work. View Contractor License Numbers View Terms and Conditions

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Hot Water Heater Installation, Repair & Replacement at The Home Depot

HOUSTON, Oct. 7, 2013 /PRNewswire-iReach/ -- Many homeowners today are aware that they have two main options to consider when replacing a hot water heater in their home. They can install a tank-style hot water heater or a tankless hot water heater, and both provide them with the ability to enjoy hot water through their plumbing features on demand. However, a tankless hot water heater seems to offer improved benefits, and because of this, some homeowners are interested in learning more about the installation of this style of hot water heater. Southern Plumbing is a full-service plumbing company that has been providing services to Houston area residents for many years, and it is dedicated to providing its valued clients with professional water heater installation services.

The fact is that a tankless style of hot water heater is indeed beneficial to many homeowners, but this style of hot water heater may not be ideal for all homes. This is a style of hot water heater that heats water on-demand, so there is never a worry about running out of hot water because the water stored in a tank has been depleted. However, the tankless hot water heater is only capable of heating a certain amount of water at a time. Because of this, it is important for homeowners to consider their demands for hot water in the home and to ensure that the tankless hot water heater can meet those demands. The dedicated and knowledgeable team at Southern Plumbing can help local residents learn more about the options.

Provided a tankless hot water heater can meet the demands of the home's occupants, it may be a superior option to a tank-style hot water heater. This is because it is known to be more energy efficient. Tank water heaters maintain the water stored in the tank at a constant temperature. Because hot water is not used in most homes throughout the day, storing heated water can be a waste of energy. A tankless hot water heater may help homeowners to reduce energy and water costs alike.

Individuals who make the decision to move forward with the installation of a tankless hot water heater may enjoy professional installation services from Southern Plumbing. The team is available to provide emergency service around the clock. While some water heater replacements are not urgent matters, others are. When the hot water heater goes out in the middle of the night and a replacement is needed, fast installation services may be a true benefit. Whether one tankless hot water heater is being installed or multiple heaters are being installed in piggyback fashion, the team at Southern Plumbing can help.

Some local residents need to schedule fast service for a hot water heater replacement when their current heater has stopped working. Others may be interested in making an upgrade for energy efficiency purposes. For all hot water heater installation needs, the pros at Southern Plumbing will help local homeowners explore the options and make a decision that is best for their needs and budget.

About

Southern Plumbing is a reputable plumbing company that offers both residential and commercial services in the greater Houston area and surrounding communities like Sugar Land and Missouri City. The skilled team offers 24-hour emergency service to ensure customers do not have to wait long for plumbing assistance. The company can be reached by phone at 713-561-6326.

Media Contact: James York, Southern Plumbing, 713-561-6326, james@southernplumbing.com

News distributed by PR Newswire iReach: https://ireach.prnewswire.com

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via YouTube Capture.

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Tankless Water Heater Installation Part 1 - Placement, Valves, and Unions
Rheem RTG-84XLN 8.4 GPM Low NOx Outdoor Tankless Gas Water Heater http://amzn.to/131CBx3 3 Valve set: http://amzn.to/1bxWmVq My website: http://sparkychannel...

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Tankless Water Heater Installation Part 1 - Placement, Valves, and Unions - Video

One very difficult water heater install.

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This is a complete video of a water heater installation.

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KC #39;s 23 1/2 Hour Plumbing Tankless Water Heater Installation
KC #39;s 23 1/2 Hour Plumbing technicians installing a Navien tankless water heater in Palm Springs. Got plumbing problems? Call KC #39;s 23 1/2 Hour Plumbing at (76...

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DIY Gas Water Heater Install
Replacing a water heater is easy. They are light when empty. They are not cheap. Home center may post an installation price of $200 or so in addition to the cost of the unit. However, when the installer comes to your house, he may (will) find several items that need to be corrected AND WILL CHARGE YOU for them. IE venting, shut offs, electric service, gas lines, physical access, fittings, down tube for pressure relief valve, drain pan and drain lines, platform if installed in a garage, strapping in earthquake zone and every other code requirement. BTW If any water or steam whatsoever comes out of the Temperature and Pressure relief Safety Valve, something is wrong and needs to be corrected immediately. The water could be boiling and producing steam. The down tube connected here is just in case there is a failure and steam blows out of there, the steam does not scald you. The down tube serves no other function and is a safety requirement. Of course, to be injured, you would have to be standing right there when the failure occurred. In some areas, building codes require this to be piped outside to save property from water damage in the event of a failure. IMHO: Modern water heaters are well insulated and a thin blanket of insulation wrapped around the outside if the unit will do little to save any energy. Kind of a gimmick. Installing an expensive timer to turn on/off an electric water heater is Third World and can greatly reduce the convince of having hot water available ...

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DIY Gas Water Heater Install - Video

Gas Water Heater Install.wmv
Another great video testimonial from a new customer. Matt installed a gas water heater for Trish and we love the feedback. Read more of our reviews at http://www.waterheatersonly.com to see why we #39;ve earned over 450000 satisfied customers since 1968. Water Heaters Only Inc specializes in water heater installation, repair and replacement including gas, electric, tankless and commercial water heaters. Call 24 hours a day with a question or for service 1-866-946-7842. Enjoy our video! San Jose Water Heater Install Gas Water Heaters

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Gas Water Heater Install.wmv - Video