Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
PRO1 IAQ T855SH Standard Thermostat - Standard Thermostats
PRO1 IAQStandard Thermostats

PRO1 IAQ T855SH Standard Thermostat

The PRO1 IAQ T855SH is a low-voltage thermostat for heat and cool applications, featuring a rectangular shape and push-button control. It supports 2H/3C conventional and 5H/3C heat pump staging with automatic…

SKU 3G-OTH-70518

Brand
PRO1 IAQ
Item
T855SH Standard Thermostat
Part Number
T855SH
Category
Standard Thermostats
Available to Order
Also known as:T855SHPRO1 IAQ
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

PRO1 IAQ
Manufacturer Part Number
T855SH
Type
Auto, Horizontal, Rectangle, Horizontal
Day
5-1-1/7
Shape
Rectangle
Stages
2H/3C Conventional, 5H/3C Heat Pump
Application
Heat and Cool
Control Type
Push Button
Changeover Type
Automatic
Mounting Direction
Horizontal
Terminal Designations
D
Humidification Control
Yes
Programming Capability
5-1-1
Temperature Control Range
44° to 90°F

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

PRO1 IAQ Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The PRO1 IAQ T855SH is a low-voltage thermostat for heat and cool applications, featuring a rectangular shape and push-button control. It supports 2H/3C conventional and 5H/3C heat pump staging with automatic changeover, a 5-1-1 programming capability, and a temperature control range of 44° to 90°F. This model includes humidification control and is designed for horizontal mounting with terminal designation D.

Frequently Asked Questions

What is the PRO1 IAQ T855SH thermostat used for?

The PRO1 IAQ T855SH is a low-voltage thermostat for residential or light-commercial heat and cool applications. It supports 2H/3C conventional and 5H/3C heat pump staging with automatic changeover, making it suitable for multi-stage HVAC systems requiring precise temperature control from 44° to 90°F.

What are the specifications of the PRO1 IAQ T855SH thermostat?

The PRO1 IAQ T855SH is a rectangular, push-button thermostat with 5-1-1 programming capability. It supports 2H/3C conventional or 5H/3C heat pump staging, automatic changeover, and a temperature range of 44° to 90°F. It includes humidification control, terminal designation D, and is designed for horizontal mounting.

Where to buy the PRO1 IAQ T855SH thermostat worldwide?

3G Electric supplies the PRO1 IAQ T855SH thermostat to customers 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; we source and deliver this model to meet your project needs.

How to install the PRO1 IAQ T855SH thermostat?

Install the PRO1 IAQ T855SH thermostat on a horizontal wall surface, away from direct sunlight or drafts. Connect wires to terminal designation D per the system’s wiring diagram. Ensure power is off before installation. For multi-stage systems, verify compatibility with 2H/3C conventional or 5H/3C heat pump staging.

Used in

Common applications for PRO1 IAQ
Commercial HVAC maintenance — PRO1 IAQ T855SH thermostat for multi-stage heat pump control in office buildings
Facility energy management — PRO1 IAQ T805 programmable thermostat for 7-day scheduling in retail spaces
Light commercial retrofit — PRO1 IAQ T501M analog thermostat for simple heat/cool control in small shops
Indoor air quality monitoring — PRO1 IAQ R751WO wireless sensor for temperature and motion detection in conference rooms
Heat pump system replacement — PRO1 IAQ T625-2 thermostat for 2H/1C heat pump staging in residential units
Thermostat guard replacement — PRO1 IAQ T150K replacement keys for securing T150 plastic guards in public areas
Not sure this is the right part? Photo-identify it

PRO1 IAQ Products

3G Electric supplies PRO1 IAQ standard thermostats. 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

More from PRO1 IAQ

View all PRO1 IAQ parts

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first