Replacement Hot Surface Ignition Board (HSI) works with all liquid propane (LP) or natural gas (NG) Guardian HSI model heaters from LB White.
For use with these Guardian and Smart heater models:
- Guardian AW060
- Guardian AW100
- Guardian AW250
- AB200CH
- AWO75EH
- AW215CH
- AW230EH
- AW230FH
- AW325BH
- AW250 Smart Sense