We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

Honeywell Thermostat: 0°F to 100°F, 24V AC, 5 ft Capillary, 135 ohm Potentiometer - Proportional Temperature Controls
HoneywellProportional Temperature Controls

Honeywell Thermostat: 0°F to 100°F, 24V AC, 5 ft Capillary, 135 ohm Potentiometer

The Honeywell T991A1426 is a proportional temperature control (VAV thermostat) with a 0°F to 100°F range, operating on 24V AC input and a 135 ohm potentiometer output signal. It features a 5 ft capillary and supports…

SKU 3G-OTH-67701

Brand
Honeywell
Item
Thermostat: 0°F to 100°F, 24V AC, 5 ft Capillary, 135 ohm Potentiometer
Category
Proportional Temperature Controls
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

Honeywell
Manufacturer Part Number
T991A1426
Type
Horizontal/Vertical
AC
24V
Capillary
5 ft
Input Voltage
24V AC
Output Signal
135 ohm Potentiometer
Potentiometer
135 ohm
Mounting Orientation
Horizontal/Vertical
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

Honeywell Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Honeywell T991A1426 is a proportional temperature control (VAV thermostat) with a 0°F to 100°F range, operating on 24V AC input and a 135 ohm potentiometer output signal. It features a 5 ft capillary and supports horizontal or vertical mounting orientation.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the Honeywell T991A1426 VAV thermostat used for?

The Honeywell T991A1426 is a proportional temperature control used in variable air volume (VAV) systems to regulate temperature in commercial HVAC applications. It provides a 135 ohm potentiometer output signal based on sensed temperature changes, enabling precise damper or valve modulation.

What are the specifications of the Honeywell T991A1426?

The Honeywell T991A1426 operates on 24V AC input and outputs a 135 ohm potentiometer signal. It has a temperature range of 0°F to 100°F, a 5 ft capillary, and supports horizontal or vertical mounting orientation. The manufacturer part number is T991A1426.

Where to buy the Honeywell T991A1426 worldwide?

3G Electric supplies the Honeywell T991A1426 VAV thermostat worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this proportional temperature control.

How to install the Honeywell T991A1426 VAV thermostat?

Mount the Honeywell T991A1426 in a horizontal or vertical orientation as needed. Connect 24V AC input power and wire the 135 ohm potentiometer output to the controller. Ensure the 5 ft capillary is properly routed to sense duct or room temperature. Follow standard HVAC wiring practices.

Used in

Common applications for Honeywell
Commercial kitchen and inflight-catering steam boilers — RM7890 / RM7895 flame relays with UV detection
Food-processing ramp-and-dwell ovens — DBC2000E / DBC2100E controllers
Hotel and hospital boiler plants — VR8205 combination gas controls
Petrochemical tank-farm heating — V4xxx gas-valve bodies with ML7420 actuators
Retrofit swap-outs from legacy Fireye / Satronic — Honeywell replacement kits

Honeywell Products

3G Electric supplies Honeywell proportional temperature controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Similar products

Matched by specification & description
HONEYWELL VAV Thermostat: Heat and Cool, Auto and Manual, Heat-Cool-Off, Vertical, Rectangle, 24V AC (MPN TB7980A1006/U). Key specifications — Application: Heat and Cool; Voltage: 24V AC; Terminal Designations: Open Closed; System Settings: Heat-Cool-Off; Temperature Control Range: 50° to 95°F; Changeover Type: Automatic and Manual; Shape: Rectangle; Brand: HONEYWELL.
Honeywell
HONEYWELL VAV Thermostat: Heat and Cool, Auto and Manual, Heat-Cool-Off, Vertical, Rectangle, 24V AC (MPN TB7980A1006/U). Key specifications — Application: Heat and Cool; Voltage: 24V AC; Terminal Designations: Open Closed; System Settings: Heat-Cool-Off; Temperature Control Range: 50° to 95°F; Changeover Type: Automatic and Manual; Shape: Rectangle; Brand: HONEYWELL.
HONEYWELL VAV Thermostat: Heat and Cool, Auto and Manual, Heat-Cool-Off, Vertical, Rectangle, 24V AC (MPN TB6980A1007/U). Key specifications — Application: Heat and Cool; Voltage: 24V AC; Terminal Designations: T2/COM; System Settings: Heat-Cool-Off; Temperature Control Range: 50° to 95°F; Changeover Type: Automatic and Manual; Shape: Rectangle; Brand: HONEYWELL.
Honeywell
HONEYWELL VAV Thermostat: Heat and Cool, Auto and Manual, Heat-Cool-Off, Vertical, Rectangle, 24V AC (MPN TB6980A1007/U). Key specifications — Application: Heat and Cool; Voltage: 24V AC; Terminal Designations: T2/COM; System Settings: Heat-Cool-Off; Temperature Control Range: 50° to 95°F; Changeover Type: Automatic and Manual; Shape: Rectangle; Brand: HONEYWELL.
HONEYWELL VAV Thermostat: Heat and Cool, Auto and Manual, Heat-Cool-Off, Vertical, Rectangle, 24V AC (MPN TB7980B1005/U). Key specifications — Application: Heat and Cool; Voltage: 24V AC; Terminal Designations: T3; System Settings: Heat-Cool-Off; Temperature Control Range: 50° to 95°F; Changeover Type: Automatic and Manual; Shape: Rectangle; Brand: HONEYWELL.
Honeywell
HONEYWELL VAV Thermostat: Heat and Cool, Auto and Manual, Heat-Cool-Off, Vertical, Rectangle, 24V AC (MPN TB7980B1005/U). Key specifications — Application: Heat and Cool; Voltage: 24V AC; Terminal Designations: T3; System Settings: Heat-Cool-Off; Temperature Control Range: 50° to 95°F; Changeover Type: Automatic and Manual; Shape: Rectangle; Brand: HONEYWELL.
HONEYWELL Line Volt Mechanical Tstat: 0° to 100°F, Steel, Adj, 3° to 10°F, 120 to 240V AC Volt (MPN T675A1565). Key specifications — Switch Type/Action: SPDT, Open/Close on Rise; Temperature Control Range: 0° to 100°F; Temperature Differential: 3° to 10°F; Voltage: 120 to 240V AC; Capillary Length/Bulb Diameter: 20 ft Capillary, 4-3/16 in x 1/2 in Bulb; Brand: HONEYWELL; Differential Type: Adjustable; Enclosure Material: Steel.
Honeywell
HONEYWELL Line Volt Mechanical Tstat: 0° to 100°F, Steel, Adj, 3° to 10°F, 120 to 240V AC Volt (MPN T675A1565). Key specifications — Switch Type/Action: SPDT, Open/Close on Rise; Temperature Control Range: 0° to 100°F; Temperature Differential: 3° to 10°F; Voltage: 120 to 240V AC; Capillary Length/Bulb Diameter: 20 ft Capillary, 4-3/16 in x 1/2 in Bulb; Brand: HONEYWELL; Differential Type: Adjustable; Enclosure Material: Steel.
Temperature Control: Single Stages, Heat and Cool, -40°F to 248°F, Digital, 1, SPDT (MPN T775B2032/U). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: T775B2032/U; Product Type: Temperature Control; Application: Temperature Sensing and Control; Brand: HONEYWELL; Input Voltage: 120V AC.
Honeywell
Temperature Control: Single Stages, Heat and Cool, -40°F to 248°F, Digital, 1, SPDT (MPN T775B2032/U). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: T775B2032/U; Product Type: Temperature Control; Application: Temperature Sensing and Control; Brand: HONEYWELL; Input Voltage: 120V AC.
Temperature Control: Single Stages, Heat and Cool, -40°F to 248°F, Digital, 1, SPDT (MPN T775M2048/U). Key specifications — Variable Output Voltage: Yes; Manufacturer Part Number: T775M2048/U; Product Type: Temperature Control; Application: Temperature Sensing and Control; Brand: HONEYWELL; Input Voltage: 240V AC.
Honeywell
Temperature Control: Single Stages, Heat and Cool, -40°F to 248°F, Digital, 1, SPDT (MPN T775M2048/U). Key specifications — Variable Output Voltage: Yes; Manufacturer Part Number: T775M2048/U; Product Type: Temperature Control; Application: Temperature Sensing and Control; Brand: HONEYWELL; Input Voltage: 240V AC.

More from Honeywell

View all Honeywell parts