NordicStove Burner Ring Set 7.6" x 2" OD, 250

The burner rings form the primary combustion surface inside the vaporizing burner cavity of the NordicStove 250 series heater. Heating oil delivered through the fuel nozzle tube enters the base of the burner cavity, contacts the heated burner surface, and vaporizes. The vaporized fuel rises through and around the burner rings, where it mixes with combustion air drawn downward through the chimney draft and ignites across the catalytic ring surfaces. The catalytic properties of the rings support more complete and efficient combustion of the vaporized fuel, contributing to consistent heat output and reduced carbon emission across the operating range of the heater.

Each burner ring in the set is marked with an orientation indicator — identified as UP or UPSIDE — that must face upward when the ring is placed into the burner cavity. Where the set includes two rings designated as upper and lower, the correct ring must be placed in its designated position within the stacking order inside the cavity. Installing a ring upside down or placing the upper and lower rings in reversed positions disrupts the designed fuel vaporization and air-fuel mixing pattern within the burner, which can produce uneven flame distribution, incomplete combustion, and reduced heat output at both burn settings.

The burner ring set should be replaced when carbon accumulation on the ring surfaces cannot be adequately removed through routine cleaning with a brush or carbon-removing fuel additive, when the ring surfaces show physical deterioration such as cracking or erosion that reduces the effective combustion surface area, or when flame quality and heat output at the high or low burn settings remains degraded after cleaning and oil controller calibration have been verified as correct. Replacement of the burner ring set is a standard maintenance procedure following extended heavy use across multiple heating seasons.

The NordicStove 250 series uses a gravity-fed vaporizing burner system in which heating oil drips into the base of the burner cavity from the fuel nozzle. If the stove is not level, the oil pools unevenly at the base of the burner rather than distributing across the full bottom surface as designed, which causes uneven vaporization and an irregular flame pattern that is particularly pronounced at the low burn setting. An unlevel stove can cause the flame to burn on one side only, extinguish at low settings, or produce excessive carbon accumulation on the lower side of the burner rings where pooled oil contacts the ring surface without vaporizing cleanly.

No. The 50007 burner ring set is sized at 7.6 inches by 2 inches outer diameter specifically for the NordicStove 250 series burner cavity. The 68, 130, and 400 series NordicStove heaters use burner cavities of different dimensions that require burner ring sets sized to match their specific cavity geometry. Installing a ring set from a different series will result in an improper fit within the burner cavity, preventing the rings from seating correctly and disrupting the designed air-fuel mixing geometry that determines combustion quality and flame distribution in the burner.

After heavy continuous use over several months, the burner rings should be inspected and cleaned as part of the recommended periodic maintenance schedule for NordicStove heaters. A small quantity of carbon-removing fuel additive introduced to the burner while it is operating can reduce carbon deposits on the ring surfaces without requiring disassembly. If the additive does not remove sufficient carbon, the top plate should be removed, the burner rings lifted out, and the interior walls of the heater and burner cavity brushed clean before the rings are reinstalled in their correct orientation. The condition of the ring surfaces should be assessed at each cleaning to determine whether replacement is warranted.