Boilers equipped with condensing economizers can have an overall efficiency that exceeds 90 percent. A condensing economizer can increase overall heat recovery and steam system efficiency by up to 10 ...

As buildings age, so do the major central equipment within the building, making it a prime opportunity for a boiler system retrofit. Older systems typically are made up of non-condensing boilers that ...

The plume of steam from our neighbour's boiler flue blows over our patio and obscures our windows. Your reply in a recent column to another question about this was that the plume may not be dangerous.