The Occupational Safety & Health Administration (OSHA) recommends water heaters be set to While you might be prone to just crank up the heat, water that is too hot is potentially more dangerous, especially if you have kids around the house.

settings on a boiler call for a Low temperature (boiler cut-in) between 120 and 160 °F.Typical operating temperatures on a hydronic boiler call for a high temperature (boiler cuts off) of 180-200 °F.If we set the boiler upper temperature too high over 200 degrees F. we're at risk of spilling at the pressure temperature relief valve.If we set the boiler upper limit too low, there may be no relief valve problem but under some conditions we may reduce the operating efficiency of the boiler and heating system, thus increasing heating costs. U.K. and european heating systems should be pressurized to between 1 and 1.5 bar - cold.20 psi is typical for U.S. / Canadian residential heating systems normal hot operating temperature, up to just under 30 psi, depending on the high-limit temperature setting on the boiler limit control.If we set the boiler high-limit much over 210, on many residential systems the system pressure will exceed 30 psi and we'll see water leaking from the pressure/temperature relief valve - ultimately an unsafe condition.If your building is taller than two floors, the installer may have needed to boost the starting "cold" water pressure for your boiler to overcome the hot water distribution piping head pressure - otherwise your heating circulators may not be able to circulate hot water.ITT Industries (B&G et als) point out in technical publications that the pressure you read on the pressure gauge is only the system pressure at that location and at that particular operating condition (temperature and circulator on or off). The Consumer Product Safety Commission (CPSC) recommends setting the water heater at Of course, every house is different. Best Fortunately, most water heater types are adjusted similarly.For instance, most newer gas and electric water heaters have a thermostat behind an insulated access panel. Normally, the HIGH is going to be 180°F. How do I adjust the boiler temperature… Typical operating temperatures on a hydronic boiler call for a high temperature (boiler cuts off) of 180-200 °F. Use the digital control panel to adjust the temperature up and down as needed.Some gas water heaters feature a dial near the bottom of the unit that you can simply adjust by turning it -- no tools required. Over 30 psi boiler pressure will cause the pressure relief valve to open.Typical operating temperature Smart English Details areResidential steam heating systems are almost always designed to operate at very low pressures, perhaps around 0.2 to a maximum of 0.5 psi - that' s 1/2 of one psi. It can save money and your skin.No one likes a cold shower. Electric water heaters often have two thermostats -- one at the top and another at the bottom of the tank. This keeping warm is normally used for domestic hot water production. The LOW setting is the temperature that the boiler will keep itself warm at. It's smart to stay within the range of 120 to 140 degrees Fahrenheit (49 to 60 degrees Celsius). At 150 degrees Fahrenheit (66 degrees Celsius), it only takes two seconds to suffer third-degree burns.


You may need to make additional adjustments to get the temperature just right.If you've raised the temperature and you're still experiencing cold showers, your hot water heater may need to be serviced or even replaced.Be respectful, keep it civil and stay on topic.