DOMESTIC HOT AND COLD WATER SUPPLY AND CENTRAL HEATING SYSTEMS 05 UK SERVICE CONDITIONS The service conditions in UK water supply and heating applications during routine operation and system malfunction are shown in the table below. Plastic pipes and fittings assessed against all of these service conditions (designated as Class S to Table 1,

Hot water heating systems need a little maintenance, like venting the radiators and draining the boiler, to keep things running efficiently. Gravity and hot water furnaces are not often installed in new homes today, but similar systems with the old cast-iron radiators throughout the house were

Hot-water radiators are one of the most common heat distribution systems in newer homes, second only to forced-air systems. They are typically a baseboard-type radiator or an upright design that resembles steam radiators. The most common problem in hot-water systems is unwanted air in the system.

In the supplying of hot water for large buildings the boiler is generally of the horizontal style, hung by wrought-iron hangers from the cellar timbers, although vertical boilers are sometimes used. The source of heat for such boilers is generally a special tank heater. Live and exhaust steam are

Gravity Circulating Heating System. In a hot water gravity heating system the circulation of water is a result of the density difference between hot water in the supply lines and cold water in the return lines.

Hydronics is the use of water as the heat-transfer medium in heating and cooling systems. A hydronic piping system is used to circulate chilled or hot water with the connections between the piping and the terminal units made in a series loop.

The hot water pump and distribution piping for electrically heated systems are similar to those of gas- and oil-fired hot water systems and should be checked as described below. Assess the condition of forced hot water heating systems as follows: Boiler. Most hot water and steam heating systems have steel boilers with a service life of about 20

Water heating is a heat transfer 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.

Hot Water Supply Systems Page 3 of 4 www.hotwater.com AOSDG25310 For Technical Information and Automated Fax Service, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.

The Mod Con VWH Supply Boiler delivers domestic hot water at a 98% thermal efficiency. The high grade modulating gas burner operates at a five to one turndown ratio to meet variable water heating needs. Its quality construction and advanced features make the Mod Con VWH ideal for all commercial water heating applications.