Hayward IDXL2DB1930 Display Board Replacement for H-Series and H- Series IDL2. This display board is designed to use with Hayward Universal H-Series Low NOx Heater model H350FDP, H350FDP also compatible with Hayward Universal H-Series Low NOx induced draft heater models H250IDL2, H350IDL2, H400IDL2. The IDXL2DB1930 Display Board Replacement is 4-5/8″ x 3-3/8″ and comes with a 4 pin communication cable. Hayward Pool Products Inc. Catalog Part Number: 6223-181. Pool/Spa Part – Hayward – Display Board Only UHSLN – IDXL2DB1930. View more great items. W3H250FDN Universal H-Series, Low NOx, 250K BTU, Natural Gas, Pool & Spa Heater. $3,179.00. Hayward W3HP21404T HeatPro 140K BTU, 230V, Titanium, Digital, Electric Pool Heat. $5,499.00. Hayward Flame Sensor UHSLN IDXLFLS1930. Raypak Digital Low NOx Natural Gas 399000 BTU Pool Heater 009243. $3,897.99. This listing is currently undergoing maintenance, we apologise for any inconvenience caused.