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Select the system and features that you are looking for in a Heat-Timer product
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DIGI-SPAN® HWE-Elite & SEQ-3 Series


The perfect energy saving outdoor reset controls for residential and light commercial hot water outdoor reset heating applications. All of the DIGI-Elite Series controls come with a digital display, adjustable reset ratio, offset, and outdoor cutoff.


HWE-SS Single Stage – Hot water Outdoor Reset energy saving boiler control with multiple domestic hot water priority options for single stage boiler applications. Replaces the HWM 100


HWE-MOV – Provides Hot water Outdoor Reset energy saving motorized valve control. It modulates a 3 or 4 way motorized valve. Replaces the HWM 200



SEQ-3 – This control provides Hot water Outdoor Reset energy saving control for multiple boiler applications. Controls up to 3 Stages (3 on/off, 2 on/off + System pump, 1 lo/hi + System Pump, 1 on/off + System + DHW Pump). Replaces HWM 550 and HWE-Multi Stage.



DIGI-SPAN® MC-Elite Series

This series of controls senses temperature, pressure, Vacuum, or humidity and provides either an Analog 0-5V, 0-10V, 1-5V, 2-10V, or 4 to 20mA output (MCA-Elite),a Proportional 0 to 135 Ω output (MCP-Elite), and a Floating output (MCF-Elite).

In addition to set point control, the MC-Elite can operate with an outdoor sensor to satisfy Outdoor Reset applications.




The Heat-Timer RSM is designed to control under slab heating systems used to melt ice or snow in Residential applications. It can be used in driveways, staircases, sidewalks, or other locations, which must be kept clear on snow or ice. The RSM will activate the slab heating system when the outdoor temperature is low enough that ice or snow could form.




The SPC-Elite (single set-point control) series is used to sense temperature, high temperature, pressure, vacuum, or humidity and provides a S.P.D.T (single pole, double throw output). It is used whenever on/off or two-position control is desired.




The TSC-Elite (two-stage set point control) can measure and control temperature, pressure, vacuum or humidity and provides two Normally Open outputs. These outputs can be field configured for heating, cooling, or heating/cooling (Change-Over Control (COC)) applications.




The VSP-Elite is a variable speed injection pump control and is ideal for most residential and light commercial radiant hydronic heating. The VSP-Elite adjusts the speed of the pump to accurately control the amount of hot water injected into the heating/secondary loop. The VSP-Elite can be used as a hot water Outdoor Reset or single set point control.



Gold-SMC (Snow Melt)(Obsolete)

The Heat-Timer SMC control is designed for under slab heating systems utilized for snow and ice melting. It can be used in applications such as driveways, parking lots, staircases, walkways, station platforms, etc. It senses slab temperature, the absence or presence of precipitation, slab water supply and return as well as boiler water return temperature.




The Mini-MOD is an outdoor reset modulating boiler control with built-in Domestic Hot Water Priority. The Mini-MOD can modulate multiple hot water boilers in a Hydronic / hot water heating applications to offer maximum fuel savings. Up to two Mini-Extension can be added each connecting to 6 additional boilers. Summarized, the Mini-Mod can control a total of 16 boilers using two Mini-Extensions.




Is an outdoor reset hybrid control. It operates condensing and non-condensing boilers in a Hydronic heating application with or without Domestic Hot Water Priority to achieve the highest efficiency. It operates both modulating and staging boilers. The Mini-MOD-CNC sequences up to 4 boilers for Hydronic Applications. In addition, up to two Mini-Extension can be added, each connecting to 6 additional boilers, to increase the total number of operated boilers to 16.



Motorized Valve Radiant

The Heat-timer Radiant Valve is designed to provide superior control and reliability. The valve is primarily designed for use in Commercial and Residential Hot Water Heating Systems, controlling the temperature of a zone.



Platinum: HWR (Hot Water)

The HWR Platinum is a hot water boiler Outdoor Reset heating control with a built-in Domestic Hot Water Priority option. It operates a single boiler and a motorized valve to achieve maximum fuel savings.

See Remote Communication, Internet Communication, BACnet communication, or Modbus Communication add on.



Platinum: HWRQ (Hot Water)

The HWRQ Platinum is a multiple hot water boiler Outdoor Reset heating control with built-in Domestic Hot Water Priority that offers tremendous fuel savings. It controls up to 8 boiler Stages (8 on/off, 4 2-Stage, 2 3 Stage, or 2 4-Stage boilers)and up to 24 additional stages can be added using multiple Extension Modules.

See Remote Communication, Internet Communication, BACnet communication, or Modbus Communication add on.



SQ-Elite Series

The SQ-Elite is the perfect control whenever multiple stages are required for heating, cooling, pressure, or humidity applications. It will automatically activate as many stages needed to maintain precise set point control using P.I.D logic or an Over-Size System concept. In addition, it can be set to a specific set point or can use Outdoor Reset. The SQ-Elite is equipped with DHW Pump (-8T models only), and combustion air damper relays. In addition, it provides an advanced logic to protect boilers from cold returns (SQ-Elite-8T and SQ-Elite-MV models only).

The SQ-Elite-8T and SQ-Elite-MV can provide an additional output for each boiler for a boiler pump or boiler valve, which can remain active for an adjustable time delay.




The ZCP is a Zone Switching Relay that operates either zone pumps or zone valves. It has a built-in with domestic hot water priority option and boiler warm up option. Two zone controls can be cascaded together to provide a large number of zone outputs.