Combustion Products From Sources Other Than Wood Appliances.

Mitigation in most cases is similar to that of the wood stove strategies mentioned earlier.

Portable Combustion Space Heaters.

The problems of the portable space heater are similar to the wood-burning appliance only there is no chimney to carry combustion products away. These heaters are used to take advantage of the highly effective concept of zone heating. Heating only the area you are using is an excellent idea when you take into account humidity control, heat source, and ventilation needs. In the properly tightened home there is no room for appliances that consume interior air for combustion. There is also no room for an appliance that discharges combustion products into the home. In chemistry it is taught that total combustion yields three products: CO(2), H(2)O, and heat. This is true if there is ample oxygen, high enough temperature, and fuel without impurities. Rarely, outside of the laboratory, are any of these three criteria meet, let alone all three.

If a particular room has a high occupancy rate, then a permanent installation with proper intake and discharge vents might be appropriate. Education of the public is needed since subsequent property owners can, quite beyond the control of B.P.A., bring in portable combustion space heaters.

Natural Gas Furnaces and Hot Water Heaters in Living Areas.

Again, as with wood-burning appliances, a source of combustion air must be brought in from outside the structure. Since furnaces and hot water heaters already have flues to vent combustion products, the necessary modifications are minimal.

Natural Gas Fired Ranges and Ovens.

All stoves and ranges, irregardless of their fuel types, should have an