Check the listing for details. SUBURBAN 521099, 12V DC 3G Fan Control Board for Suburban Furnaces SHIPS TODAY. Condition: New. Listed at 101.99 USD. This Suburban 12V DC 3G Fan Control Board is for the furnace and water heater fan ignition.12 VDCLocal FlameWorks with all SF and NT Furnace models.Replaces Suburban 520820 & 232613.Replaces models: DD-17-DSI, NT-12S, NT-12SE, NT-16S, NT-20S, NT-16SE, NT-20SE, NT-24S, NT-24SP, NT-24M, NT-25K, NT-30S, NT-30SP, NT-34S, NT-34SP, NT-42T, SF-20, SF-20F, SF-25, SF-25F, SF-30, SF-30F,SF-30FQ, SF-35, SF-35F, SF-35Q SF-42, SF-42F, SF-42Q..For NT-24SP, NT-30SP, NT-34SP, NT-40 you will need 520839 Module Board Wiring Harness.Will Not Replace 24 Volt AC BoardsDimensions: 4-1/2" x 2-5/8". SAME DAY SHIPPING ON ORDERS PLACE BEFORE 2:00PM EASTERN TIME Next day air shipping for Saturday delivery note to all buyers:All orders placed on Fridays will arrive the following Monday/Tuesday depending on location orholiday schedule.Ebay does not provide that shipping option. Thank you for your business 24/7 Parts