COCOON THRMS-1-1400 / THRMS-1-1500 Thermal Mass Duct Heater

COCOON Thermal Mass Duct Heaters are designed to provide supplemental heating that helps stabilize indoor temperature swings and improve overall comfort in residential, commercial, and specialty HVAC applications.

Unlike traditional electric duct heaters that cycle on and off with immediate heat output, COCOON Thermal Mass Technology stores and releases heat more gradually. This helps reduce hot and cold fluctuations in the air stream and creates a more consistent delivered temperature throughout the space.

The THRMS-1-1400/1500 models are engineered for flexible integration into existing HVAC systems, making them ideal for installations where additional heat support, zoning correction, or temperature balancing is required.

Key Benefits

• Helps stabilize indoor temperature swings by smoothing heat delivery in the air stream
• Provides supplemental heating support for uneven or undersized HVAC zones
• Uses Thermal Mass Technology to store and release heat more consistently than traditional duct heaters
• Improves perceived comfort by reducing hot and cold air fluctuations at the register level
• Integrates directly into existing HVAC duct systems without major system redesign
• Flexible installation for vertical, horizontal, or downflow configurations
• Designed for hybrid use with grid power, solar, backup generators, or battery-supported systems
• No venting required for installation flexibility
• Built for residential, commercial, and specialty HVAC applications
• Engineered and manufactured in the United States

General Specifications

THRMS-1-1400-R-P4-CA / THRMS-1-1500-R-P4-USA

Energy Source:
Electric Grid, Solar, Wind, Hydro, Backup Generator, or Hybrid Energy Systems

Venting Required:
None

Emissions:
None

BTU Capacity:
40,716 BTUs

Active Heating Output:
24,567 BTUs

Stored Thermal Energy:
16,149 BTUs

Active Power Consumption:
7.2 kW

Number of Circuits:
1

Number of Circuit Breakers:
1

Voltage:
208-240V / 480V

Frequency:
50Hz / 60Hz

Full Load Amperage:
30 Amps

Maximum Overcurrent Protection:
45 Amps

Minimum Circuit Ampacity:
Per NEC and Local Codes

Circuit Ampacity:
50 Amps

Recommended Breaker:
60 Amps

Installation Orientation:
Vertical, Horizontal, or Downflow

Electrical Phase:
Single Phase Standard
Three-Phase Available (Contact for Pricing and Availability)

Unit Dimensions:
18" W × 24" D × 36" H

Product Weight:
75 lbs

Shipping Weight:
95 lbs

Country of Origin:
United States

Safety Listing:
UL Listed – File Number SA44706

Warranty Information

• 1-Year, 5-Year, and 10-Year Limited Warranty Options
• 10-Year Heat Exchanger Warranty
• See Warranty Documentation for Complete Details

Shipping Information

Shipping Method:
LTL Freight (Where Available)

Shipping Weight:
95 lbs

Country of Origin:
United States

Application Assistance

If you have questions regarding sizing, electrical requirements, installation configuration, or application suitability, our team is available to help determine the best COCOON solution for your project. Call us at +1 314-931-1004