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Commercial

Tranquility® (ST) Rooftop Series

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The Tranquility® (ST) Rooftop Series from ClimateMaster delivers outstanding efficiency and quiet operation, making it ideal for modern HVAC applications. With sizes ranging from 3 to 20 tons and featuring eco-friendly refrigerant, these units meet and exceed ASHRAE 90.1 standards while ensuring minimal noise and enhanced control options.

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  • Overview
  • Features
  • Specs
  • Resources

Overview

The Tranquility® (ST) Rooftop Series from ClimateMaster offers exceptional efficiency and quiet operation, designed to meet modern HVAC demands. Available in sizes ranging from 3 tons (10.6 kW) to 20 tons (70.3 kW), these units exceed ASHRAE 90.1 efficiency standards and utilize R-454B low Global Warming Potential refrigerant, promoting eco-friendly performance. The innovative double isolation compressor mounting system minimizes noise, making it one of the quietest rooftop units available. Standard features include microprocessor controls, a galvanized steel cabinet, and high-efficiency EC plug fans, while options for outside air handling and advanced controls enhance flexibility and customization for various installations. The integration of iGate® 2 technology allows for real-time monitoring and adjustments, streamlining maintenance and service processes.
Tranquility ST Rooftop Series - shown - Right

Features

Standard Features

  • Sizes 036 (3 ton, 10.55 kW) through 240 (20 ton, 70.34 kW)
  • Exceeds ASHRAE 90.1 efficiency standards
  • Backward-inclined EC Plenum Supply Fans
  • Environmentally-friendly R-454B low-GWP refrigerant
  • Refrigerant Detection System (RDS) (mandatory on sizes 048 through 240, optional for size 036)
  • Dual refrigeration circuits (sizes 096 and larger)
  • Galvanized-steel cabinet construction with polyester powder-coat paint
  • Double-wall construction for access doors with stainless-steel hardware

Configurable Options

  • BACnet, Modbus and Johnson N2 compatibility options for Building Management Systems (BMS)
  • Demand-controlled ventilation (DCV) with optional enthalpy economizer and optional CO2 sensor
  • Two-way motorized water valves that prevent water flow through the unit when it is not in operation, increasing system pumping efficiency
  • Internally-mounted water pump for single-pipe systems

Performance Specifications (WLHP)

Full Load

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Cooling Capacity 
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COP Range 
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EER Range 
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Average COP 
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Heating Source Flow Rate 
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Cooling Source Flow Rate 
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Resources

97B0162N01 thumbnail

ST IOM
97B0162N01
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ST Product Catalog
LC3021
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Eng-Spec-ST thumbnail

ST Engineering Specifications
Eng-Spec-ST
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“With our research, ClimateMaster is number one. We don’t have any outside units—you can sit on the back porch without the unit clicking on or the fan running in the summertime. This being my last house, we really checked into geothermal, and it’s been the perfect solution.”

BrentHomeowner

“Now I’ve got a certified home that is 78% more energy efficient than my neighbors and 48% more efficient than new builds on the market today. I’m saving about $1,750 to $1,800 a year, and as a bonus, I get free hot water as a byproduct of my geothermal system. It’s quiet—I can hear my neighbors’ air source heat pumps, but they don’t hear mine.”

ChadResidential Professional & Homeowner

“We have geothermal—our neighbors don’t, and I know they wish they did. It’s a clean heat, not as drying to the skin, and you can feel the difference. In 6.3 years, we’ll recoup our investment, and after that, it’s all savings. Just plain facts—it saves money. ClimateMaster was the right choice: professional, customer-oriented, and easy to work with.”

PamelaHomeowner