Heating with gas and oil
Heating with natural gas furnaces, boilers and fireplaces
...gas furnace or boiler: This is a clean burn and it emits very few particles. However, overall efficiency is between 50 and 80%, much lower than a condensing gas boiler.
Both types of gas boilers are compatible with hydronic heating systems, and both types of gas furnaces blow hot air around the home.
Gas fireplace: A g...