Fits on Models: HW2, HW2A, ITB, ITCB, ITCB-DV, ITCB-DV(35700.0019), LPG, LPG-2E, OHW, OHWA, S, SA, SH Server, SH SERVER 1.0, SH SERVER 1.5, SH SERVER 1.75, Soft Heat, SOFT HEAT SERVER 1.0, SOFT HEAT SERVER 1.5, SOFT HEAT SERVER 1.75, ST, ST-20, ST35, STA, STF, STF-20, STFA, TB3, TB3-LP, TB3Q, TB3Q-LP, TB6, TB6Q, TB6-TB6Q