The Laars Heating Systems RE2077800 Relay Time Delay (120VAC) is an electrical control component designed to manage timing functions in compatible HVAC equipment. It introduces a controlled delay before switching connected components on or off, helping coordinate system operation and prevent unnecessary cycling. This relay is commonly used in Laars heating systems, boilers, and relate... https://www.partshnc.com/re2077800-laars-heating-systems-relay-time-delay-120vac