cost
The features manufacturers employ in the furnace dictate the system's efficiency, and therefore its cost, too.
Retrofitting is the process of modifying something after it has been manufactured.
Retrofitting in the context of energy efficiency for buildings, means making changes to the systems inside the building or even the structure itself at some point after its initial construction and occupation. Typically this is done with the expectation of improving improving the performance of the building, such as reducing the amount of energy that is used to perform a task such as heating. The development of new technologies such as energy efficient furnaces and/or water heaters mean that building retrofits can allow for significant reductions in energy usage.
The features manufacturers employ in the furnace dictate the system's efficiency, and therefore its cost, too.
We're all trying to decrease our impact on our environment, and retrofitting your home is one effective way of doing so.
Updating your home's energy systems you can improve your health and enhance your comfort.