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White rectangular digital thermostat with LCD display and buttons

Venstar

Venstar T1800 Programmable Thermostat 24VAC

SKU CH-APDX-HST1M MPN T1800

Programmable 24VAC thermostat controls up to three heating and two cooling stages with optional phone access

  • Energy Star statusEnergy Star Qualified
  • Rated voltage24VAC
  • Thermostat typeHeating and Cooling
  • Product typeProgrammable Thermostats
  • Product colorWhite
  • Number of items1 pack
  • Programmable scheduling saves energy by running only at set times
  • Energy Star qualified design reduces operating cost
  • Controls up to three heating stages for precise comfort
  • Manages two cooling stages for balanced temperature
  • Optional phone add-on enables remote system control

Multi-Stage Heating and Cooling Control

The Venstar T1800 is a programmable digital thermostat designed for 24VAC residential and light commercial HVAC systems. It manages up to three heating stages and two cooling stages, supporting both conventional heat/cool and heat pump configurations. Energy Star qualification confirms efficient operation.

Suited for Zoned or Multi-Stage Systems

This thermostat fits installations that require separate control of multiple heating and cooling stages, such as zoned ductwork or dual-fuel equipment. An optional phone module adds remote adjustment. Buyers needing only single-stage control or a non-programmable interface will find the extra capability unnecessary.

24VAC Power Requirement

The unit operates exclusively on 24VAC control voltage, the standard for most low-voltage HVAC equipment. Verify that the existing wiring supplies 24VAC before purchase; line-voltage or millivolt systems are not compatible.

How it compares

Measured against everything we stock in Thermostats & Thermostat Accessories, at today’s prices. Recalculated every night.

Price $101.99
Pricier than about 61% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameVenstar
Model nameT1800
Product typeProgrammable Thermostats
Product colorWhite
Power
Rated voltage24VAC
In the box
Number of items1 pack
Environment & compliance
Energy Star statusEnergy Star Qualified
More details
Thermostat typeHeating and Cooling

Questions about this item

How much power does the T1800 draw when running continuously?

The T1800 operates on 24VAC low-voltage wiring from your HVAC system, drawing minimal power with no separate electrical supply needed.

What existing wiring must be in place for the T1800 to function?

A standard 24VAC thermostat cable with connections for up to three heating stages and two cooling stages is required for full multi-stage control.

Will the T1800 control my older single-stage furnace and air conditioner?

Yes, the T1800 is compatible with both heat/cool and heat pump systems, so it works with single-stage equipment while supporting up to three heat and two cool stages.

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