There are several methods to ameliorate the efficiency of an old oil boiler or furnace. First, determine whenever your system is oversize. A decently sized oil furnace should run forty-five to fifty minutes per hour while the temperature remote is the lowest it gets into your surface area. To downsize, demand your contractor to put back the existing oil furnace nozzle with a smaller one. Reduce the nozzle just one size on a schematic cast-iron head burner. Don’t cut down it below the minimal firing rate given on the producer valuation plate.

Flaming retentivity head burners do a much best job of blending the air and fuel than old cast-iron head burners. They are now almost standard on new units and can also be added to most older ones. A high-static burner will give even better performance. Replacing the burner can increase the seasonal efficiency of an old oil-fired furnace by about 15%. The nozzle must be reduced at least one size and can be reduced even further while maintaining good efficiency. Anyhow, the flue temperature shouldn’t get lower than 400°F for an outside chimney. In the burning chamber, a ceramic fiber lining can be installed over the present liner.

Always have an experienced contractor agree the arrangement chimney or flue if a vary is made.