On Gyeongin Freeway, pass a tollgate towards Incheon and enter Gajwa IC. At this time, do not head to the Dongincheon direction but go down 200m more to turn right onto Dongam & Gajwa direction to enter an overpass to Gajwa IC. On the overpass, switch lanes to the lane going towards Suwon and City Hall, and go straight for about 1.7km. Just before Sipjeong 4-way intersection, go around Gyeongin Center building and go straight for 200m, then pass a signal at the intersection. You will then see Rinnai Korea.
Get off at Ganseok Station on Line 1, exit towards the Industrial Complex and take a cab (base fee).
Get off at Ganseok 5geori Station on Incheon Subway and come out of Exit 8. Take Bus No. 29 (every 30 minutes) and get off at Rinnai stop.