Replacement Gas Boiler

Installing a new high efficiency gas boiler can save energy dollars and improve comfort in your building.

Boilers that are well maintained can last as long as 30 years. However, the life of a boiler can be severely shortened by poor maintenance. If your boiler is very old or has not been well maintained for many years, you should consider replacing it with a new high efficiency boiler. A large boiler can be replaced with a modular boiler system that costs less to operate.

New high efficiency boilers incorporate several features to increase their Annual Fuel Utilization Efficiency (AFUE). The AFUE rating indicates what percentage of the energy in the fuel is converted into usable heat. A new high efficiency boiler has an AFUE rating of 87% while older boilers typically have AFUE ratings from 70% to 75%. If your boiler has not been well maintained, then its efficiency is further decreased. Power burners, electronic spark ignition and pulse combustion are all more efficient methods of burning the fuel. A new high efficiency boiler will incorporate one or more of these improvements.

Improvements have also been made in transferring the heat of combustion to the boiler water. Boilers lose a considerable amount of heat up the flue. Recuperative/condensing boilers recoup most of the heat from the flue gases. So much heat is extracted that the water vapor in the gases condenses, giving them the name condensing boilers. The exhaust gases from these type of boilers are low temperature and can be vented horizontally. There is no need for a chimney. This type of boiler would be an appropriate replacement for an electric boiler since no chimney exists.

How to Proceed

Contact your heating service company to do a thorough evaluation for you. They should be able to estimate how efficiently your existing boiler is performing, its usable life and whether replacing it with a new, properly sized, high efficiency unit makes sense. Your local utility representative can provide you with assistance.