What is a heat exchanger in a boiler? | Viessmann
Condensing gas combi boilers used to have two heat exchangers, as its thought that this was more efficient. To begin with, the water was heated in the primary exchanger. As hot waste gases were produced, the water that returned from its circuit around the radiators was pushed into the secondary heat exchanger,
A combination of mechanical and chemical methods is most often used to clean the heat exchangers of domestic water heaters and heating boilers. After soaking (pickling) in the detergent, the remaining scale is mechanically cleaned. Also gaining popularity are the modern techniques mentioned above. Chemicals for cleaning and prevention
Inside a gas- or oil-fired furnace, the fuel is mixed with air and burned. The flames heat a metal heat exchanger where the heat is transferred to air. Air is pushed through the heat exchanger by the air handlers furnace fan and then forced through the ductwork downstream of the heat exchanger.
Jun 11, 2020 · Noisy banging boiler. My name's Alan Hart, and today I've got a job where the customer's complaint is the boiler is noisy and it's banging and clanging. They
Dec 17, 2014 · Condensing boilers are even higher-efficiency models that can reach AFUE ratings of up to 95 percent. They use a second heat exchanger to extract heat from the exhaust gases before the gases are vented outdoors. By this process, they recover some of the heat that already has been paid for before its lost to the exhaust and ventilation processes.
Nov 21, 2018 · This is where a heat exchanger comes in. Gas boilers burn gas, which then heats up and rises towards the heat exchanger that cold water passes through. As the water circulates, the heat is transferred from the gas to the water, which then heats up to effectively warm your radiators or provide hot water for a tank.
The Best Heating Method for a New Home. Given that the average household spent nearly $100 monthly on home heating and cooling costs in 2009, the choice of heating method for a new home can prove