This is a paper from the Proceedings of the U.S. EPA and Air & Waste Management Association Conference: Emission Inventory: Living in a Global Environment
The paper was co-authored by James E. Houck and Paul E. Tiegs of OMNI Environmental Services; Robert C. McCrillis of the U.S. Environmental Protection Agency; and Carter Keithley and John Crouch of the Hearth Products Association
It provides some useful context on how optional heating fuels compare when all their impacts are considered.
Click below to download the (small) pdf document.
Air Emissions from Residential Heating.