On-Demand 

   

      A gas fired on-demand water heater is the most cost effective way to heat hot water. They run at 96-98% efficiency.  It will supply hot water for as long as you need it. When the hot water supply is open it will fire and automatically shut down when the supply is closed. Unlike a traditional tank type water heater that has to maintain water temperature even when not in use. 

      As long as they are maintained, an on-demand water heater will last 20 years which is double the life expectancy of a tank type water heater. 

      Another advantage to an on-demand water heater is they are compact and hang on the wall taking up much less space then a tank that sits on the floor. 

 

 

Tank Type Water Heater

       The most common type of water heater is a tank type. These tanks will maintain water temperature at all times. So when you need hot water it is always ready. There are several different tank type water heaters and we have the knowledge and skills to assist you in whatever you need. 

        A gas fired water heater has a burner at the bottom of the tank and is fueled by either natural gas, liquid propane, or oil. These type have a flue that goes out a chimney or is side vented out of the house. 

 

       An electric water heater has two heating elements. It is fairly common for one of those to burn out and can be quickly changed so you will have your hot water flowing again as soon as possible. 

      An indirect water heater uses the hot water from your boiler, sends it threw a coil at the bottom of the tank, and heats up the water in the tank. These are incredibly insulated where you only lose a 1/2 of a degree an hour when not in use. 

       
Tank-less Coil

      A tank-less coil does not have a storage tank for the hot water. It is similar to an on-demand water heater in the sense that it heats the water as it's being used. There is a coil inside the boiler and uses the boiler water to heat the domestic hot water.

      The boiler needs to maintain temperature at all times even in the summer. Typically kicking on at 160º F and shutting down at 180º F it is always ready to heat the water when needed.

 

      These will supply an endless amount of hot water. Over time the coil can get calcium build up on the inside and will constrict the flow resulting in loss of hot water. A simple acid flush through the coil can clean it out and have it running like new. If the build up is bad or if it develops a hole the coil can be replaced. 

     

© All-Pro Plumbing and heating LLC, 109 Fordway Ext, Derry NH. 603-921-0455

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