Inverter Ducted
A modern ducted system that delivers smooth, even comfort with inverter technology, built on a low-GWP refrigerant platform.
Condensing Unit Highlights
Our new Thermal Zone Inverter Ducted System is designed to deliver smooth, consistent comfort through a modern ducted platform built for efficiency and reliability. Engineered to operate across a wide range of conditions, the system combines inverter technology with advanced airflow management to maintain steady indoor temperatures while reducing energy consumption.
At the core of the system is a high-efficiency inverter twin-rotary compressor paired with a full DC fan motor, allowing the system to modulate output based on real-time demand. Rather than cycling on and off like traditional systems, the inverter platform continuously adjusts performance to provide more stable comfort, quieter operation, and improved humidity control throughout the home or building.
The system operates on R-454B (A2L) low-GWP refrigerant, a modern platform designed to support evolving efficiency and environmental standards. Combined with built-in monitoring and protection strategies, the Thermal Zone inverter ducted system delivers dependable operation and long-term performance in both residential and light commercial applications.
Experience balanced comfort, intelligent performance, and modern refrigerant technology with the Thermal Zone Inverter Ducted System.
Air Handler (AHU) Highlights
The Thermal Zone inverter ducted air handler is designed for reliable performance, flexible installation, and straightforward service access. Built with safety, airflow stability, and installation flexibility in mind, the platform supports a wide range of residential and light commercial applications while helping contractors install and maintain the system with confidence.
- A2L Refrigerant Leak Sensor (UL Certified) – Integrated safety sensor designed to monitor for refrigerant leaks and support safe operation with A2L refrigerants.
- Constant-Torque 5-Speed ECM Blower – Helps maintain consistent airflow under moderate static conditions to support stable system performance.
- Thermal Expansion Valve (TXV) – Provides precise refrigerant metering for improved cooling control and system efficiency.
- 4-Way Convertible Installation – Multi-position design allows installation in upflow, downflow, horizontal left, or horizontal right configurations.
- Service-Friendly Access – Slide-out blower wheel and coil simplify maintenance and service access when required.
- Optional Electric Heat Kits – Available in 5 kW, 7.5 kW, 10 kW, and 15 kW capacities to support supplemental heating needs.
What you’ll notice
More even temperature
Inverter modulation allows the system to adjust output continuously rather than cycling on / off. This helps reduce temperature swings and maintain a more consistent indoor environment.
Better comfort in shoulder seasons
When cooling or heating demand is lower, the inverter system can operate at reduced capacity. This supports improved comfort and better humidity control during milder weather.d
Quieter Operation
Instead of running at full power all the time, inverter technology allows the system to operate at lower speeds when possible, helping reduce overall sound levels.
Confidence in Tough Weather
Designed to operate across a wide range of outdoor conditions, the system maintains reliable heating and cooling performance through changing seasons.
Why Contractors choose Thermal Zone ID
Thermal Zone inverter ducted systems are designed to install cleanly, commission predictably, and operate reliably in real duct systems. With a clear controls architecture, built-in protections, and complete documentation, the platform supports dependable performance while helping contractors deliver consistent comfort for their customers.
Flexible Controls Options
The system supports RS-485 communicating control for coordinated system operation and deeper diagnostics, with optional 24V control available for traditional thermostat installations.
Stable Airflow Performance
A constant-torque ECM blower and coordinated inverter operation help maintain steady airflow under changing load conditions, supporting consistent comfort throughout the home.
Protections Built In
Integrated monitoring and protection strategies help safeguard the system from abnormal operating conditions, supporting reliable performance and reducing nuisance interruptions.
Service-Friendly Support
Submittals, installation manuals, and start-up resources are organized in one place, helping installers commission systems quickly and troubleshoot efficiently when needed.
Condensing Unit Specifications
AHU Specifications
| Rating | Measure | TZID24H520ZA | TZID36H520ZA | TZID48H520ZA | TZID60H520ZA |
|---|---|---|---|---|---|
| Power Supply | V/Ph/Hz | 208/230-1-60 | 208/230-1-60 | 208/230-1-60 | 208/230-1-60 |
| Cooling | Capacity (Btu/h) | 24000 | 34000 | 47500 | 55500 |
| EER2 (Btu/h) | 13.3 | 11.7 | 11.3 | 10 | |
| SEER2 (Btu/h) | 20 | 18.6 | 17.5 | 17 | |
| Heating | Capacity (Btu/h) | 24000 | 34200 | 48000 | 57000 |
| Capacity (17 F) | 19200 | 24000 | 40000 | 42000 | |
| Capacity (5 F) | 20000 | 24000 | 34200 | 42500 | |
| COP (5F) | 2.1 | 2.1 | 2.1 | 2.1 | |
| HSPF2 | 9.4 | 9 | 9 | 8.6 | |
| Minimum Circuit Ampacity | A | 4 | 4 | 5 | 5 |
| Max. Overcurrent Protection | A | 6 | 6 | 10 | 10 |
| Indoor Motor | ECM | ECM | ECM | ECM | |
| Indoor Air Flow | CFM | 700 | 1050 | 1670 | 1850 |
| ESP | Pa | 145 | 145 | 145 | 145 |
| Indoor noise level | dB(A) | 51 | 52 | 59 | 59 |
| Throttle Type | TXV | TXV | TXV | TXV | |
| Indoor Unit | Dimension (WxHxD) (In.) | 19-5/8×45-3/4×22 | 19-5/8×45-3/4×22 | 22×53-1/8×24-1/2 | 22×53-1/8×24-1/2 |
| Packing (WxHxD) (In.) | 22-5/6×47-5/8×25-3/5 | 22-5/6×47-5/8×25-3/5 | 25-1/5×54-3/4×28 | 25-1/5×54-3/4×28 | |
| Net/Gross Wt (lbs.) | 130/ 143 | 130/ 143 | 169/182 | 169/182 | |
| Refrigerant piping | Liquid/gas side (In.) | 3/8 / 3/4 | 3/8 / 3/4 | 3/8 / 7/8 | 3/8 / 7/8 |
Thermal Zone ID Side Dishcarge Systems
Condensing Unit Highlights
The TZID outdoor condensing unit uses variable-speed inverter operation to deliver precise, consistent temperature control while running as quiet as 55 dBA. Its side-discharge design fits compact spaces where a traditional top-discharge unit won’t, and available capacities span 18k through 60k BTU. Factory charged with R454B, it’s built for dependable performance and straightforward installation and service.
- Space-saving side-discharge design ideal for tight installations, narrow side yards, and multi-unit layouts
- Variable-speed inverter operation for precise comfort and quiet performance (as low as 55 dBA)
- Available capacities: 18k · 24k · 30k · 36k · 48k · 60k BTU, factory charged with R454B (25 ft line set)
- Compressor protection and easy service: factory-installed high & low pressure switches, outdoor temperature sensor, anti-corrosion coil coating, easy-access service valves & ports, and flare-to-braze connections
Air Handler (AHU) Highlights
The TZID air handler pairs a high-efficiency variable-speed motor with superior dehumidification to deliver consistent airflow and enhanced comfort year-round. Its 4-way multi-position design installs easily in tight spaces, and factory-installed refrigerant and safety components make it a dependable match for the TZID/S heat pump.
- High-efficiency variable-speed motor for consistent airflow, plus superior dehumidification that slows fan speed when high humidity is detected (requires communicating control or 24V thermostat with dehumidification terminal)
- Factory-installed dedicated R454B TXV and refrigerant leak sensor with dissipation board; compatible with TZID/S heat pump
- Flexible controls: communicating Wi-Fi control or optional non-communicating 24V, with installer’s-choice 1H/1C through 4H/2C wiring
- 4-way multi-position design for tight-space installs, flare-to-braze connections, and optional 3–25 kW electric heat kits (AH5EH-*KW)
A-Coil Highlights
The TZID A-coil is designed for high-efficiency side-discharge inverter heat pump systems, pairing a TXV-equipped indoor coil with outdoor EXV logic for optimized performance. Factory matched for dependable year-round heating and cooling, its multi-position design supports upflow, downflow, and horizontal installations for maximum flexibility.
- Designed for side-discharge inverter heat pump systems, with a TXV-equipped indoor coil paired to outdoor EXV logic for optimized performance
- Factory matched for dependable year-round heating and cooling, with aluminum tube & fin coil construction for durability and corrosion resistance
- Integrated R454B refrigerant leak sensor and mitigation system for added safety
- Multi-position design supports upflow, downflow, and horizontal installations, with a 24V interface included (communicating control optional)
AHU Specifications
| Thermal Zone Indoor P/N, Model | TZID18H520ZAM | TZID24H520ZAM | TZID30H520ZAM | TZID36H520ZAM | TZID48H520ZAM | TZID60H520ZAM |
|---|---|---|---|---|---|---|
| Thermal Zone Outdoor P/N, Model | TZID18H520ZCS | TZID24H520ZCS | TZID30H520ZCS | TZID36H520ZCS | TZID48H520ZCS | TZID60H520ZCS |
| IDU Power Supply(Volts; Hz; Phase) | 115/208/230V,60Hz,1Ph | 115/208/230V,60Hz,1Ph | 115/208/230V,60Hz,1Ph | 115/208/230V,60Hz,1Ph | 115/208/230V,60Hz,1Ph | 115/208/230V,60Hz,1Ph |
| ODU Power Supply(Volts; Hz; Phase) | 208/230V,60Hz,1Ph | 208/230V,60Hz,1Ph | 208/230V,60Hz,1Ph | 208/230V,60Hz,1Ph | 208/230V,60Hz,1Ph | 208/230V,60Hz,1Ph |
| Cooling Capacity (Btu/h) | 18000 | 24000 | 30000 | 36000 | 48000 | 54000 |
| Cooling Input (W) | 1635 | 2181 | 2778 | 3600 | 4800 | 6200 |
| Cooling Current (A) | 7.5 | 9.5 | 12.2 | 15.2 | 22.2 | 27.4 |
| SEER2 (Btu/h/W) | 18.8 | 18.1 | 17 | 16.1 | 16 | 15.2 |
| EER2 (Btu/h/W) | 11 | 11 | 10.7 | 10 | 10 | 8.6 |
| Cooling Capacity Range (Btu/h) | 5350~20000 | 7200~27000 | 10400~34000 | 8300~38900 | 16600~49900 | 21000~55000 |
| Cooling Input (range) (W) | 400 ~ 1900 | 530 ~ 2870 | 735 ~ 3230 | 710 ~ 4500 | 1400 ~ 5350 | 1800 ~ 6410 |
| Cooling Current(range) (A) | 2.8 ~8.5 | 3.4 ~12.6 | 3.55 ~14.23 | 4.7 ~18.3 | 6.5 ~23.8 | 8.3 ~28.5 |
| Heating Capacity (Btu/h) | 18000 | 26000 | 31000 | 36000 | 48000 | 54000 |
| Heating Input (W) | 1675 | 2396 | 2595 | 3100 | 4085 | 4650 |
| Heating Current (A) | 7.3 | 10.4 | 11.5 | 13.1 | 18.3 | 21 |
| HSPF2-4 (Btu/h/W) | 9.1 | 9.7 | 8.5 | 8.7 | 8.5 | 8.4 |
| HSPF2-5 (Btu/h/W) | 7 | 7.7 | 6.6 | 7 | 7.2 | 6.8 |
| COP (W/W) | 3.15 | 3.18 | 3.5 | 3.4 | 3.45 | 3.37 |
| Moisture removal (kg/h) | 1.71 | 2.38 | 3.57 | 3.62 | 5.29 | 5.82 |
| Indoor MINIMUM CIRCUIT AMPACITY (A) | 5.5/4.0 | 5.5/4.0 | 8.0/6.0 | 8.0/6.0 | 14.5/11.0 | 14.5/11.0 |
| Indoor MAX.FUSE (A) | 15 | 15 | 15 | 15 | 15 | 15 |
| Outdoor MINIMUM CIRCUIT AMPACITY (A) | 16 | 19 | 22.5 | 24 | 36 | 39 |
| Outdoor MAX.FUSE (A) | 20 | 20 | 25 | 30 | 40 | 40 |
| Communication Wiring | AWG 20-2 | AWG 20-2 | AWG 20-2 | AWG 20-2 | AWG 20-2 | AWG 20-2 |
| Indoor Indoor air flow (Turbo/Hi/Mi/Lo/Si) (CFM) | 618.03/576.83/529.74/488.54/488.54 | 824.04/759.29/694.55/629.8/629.8 | 988.85/894.67/806.38/712.21/712.21 | 1188.97/1083.02/971.19/865.24/865.24 | 1600.99/1471.5/1283.15/1094.8/1094.8 | 1807/1583.33/1359.67/1136/1136 |
| Indoor noise level (Turbo/Hi/Mi/Lo/Si) (dB(A)) | 44/43/41/33/33 | 44/44/42/28/28 | 46/46/42/29/29 | 48/48/45/28/28 | 53/53/50/44/44 | 56.0/52.0/49.0/34.5/34.5 |
| Outdoor Outdoor air flow (CFM) | 1450.9 | 1765.7 | 3001.8 | 2413.2 | 3037.1 | 3037.1 |
| Outdoor noise level (Hi) (dB(A)) | 55 | 60 | 60 | 63 | 65 | 65 |
| N.A. Design pressure (PSI) | 550 / 340 | 550 / 340 | 550 / 340 | 550 / 340 | 550 / 340 | 550 / 340 |
| Outdoor Refrigerant type/charge oz. | R454B/ 51.15 | R454B / 74.08 | R454B / 91.71 | R454B / 116.4 | R454B / 134.04 | R454B / 134.04 |
| Outdoor Throttle type | EXV | EXV | EXV | EXV | EXV | EXV |
| Liquid side (mm(inch)) | 9.52mm(3/8in) | 9.52mm(3/8in) | 9.52mm(3/8in) | 9.52mm(3/8in) | 9.52mm(3/8in) | 9.52mm(3/8in) |
| Gas side (mm(inch)) | 19mm(3/4in) | 19mm(3/4in) | 19mm(3/4in) | 19mm(3/4in) | 19mm(3/4in) | 19mm(3/4in) |
| Max. Piping Length (ft) | 98.4 | 164 | 164 | 246 | 246 | 246 |
| Max. Height Difference (ft) | 65.6 | 82 | 82 | 98.4 | 98.4 | 98.4 |
| Indoor Operating Temp. Range(Cooling) (F) | 60~90 | 60~90 | 60~90 | 60~90 | 60~90 | 60~90 |
| Outdoor Operating Temp. Range(Cooling) (F) | -13~122 | -13~122 | -13~122 | -13~122 | -13~122 | -13~122 |
| Indoor Operating Temp. Range(Heating) (F) | 32-86 | 32-86 | 32-86 | 32-86 | 32-86 | 32-86 |
| Outdoor Operating Temp. Range(Heating) (F) | -13~75 | -13~75 | -13~75 | -13~75 | -13~75 | -13~75 |
| Indoor Item Net/Gross weight (lb) | 105.82/126.76 | 105.60/127.43 | 128.97/153.44 | 129.41/153.88 | 162.92/190.92 | 162.92/190.92 |
| Indoor Unit Dimension WxDxH (inch) | 17.52 x21.02 x 45.00 | 17.52 x21.02 x 45.00 | 21.02 x 21.02 x 49.02 | 21.02 x 21.02 x 49.02 | 24.49 x21.02 x 52.99 | 24.49 x21.02 x 52.99 |
| Indoor Package Dimension WxDxH (inch) | 26.57 x 20.87 x 48.62 | 26.57 x 20.87 x 48.62 | 26.57 x 24.41 x 52.56 | 26.57 x 24.41 x 52.56 | 27.95 x 26.77 x 56.50 | 27.95 x 26.77 x 56.50 |
| Outdoor Item Net/Gross weight (lb) | 77.16/83.77 | 102.29/109.13 | 141.76/152.34 | 153.22/163.58 | 192.90/224.21 | 192.90/224.21 |
| Outdoor Unit Dimension WxDxH (inch) | 31.69 x 12.99 x 21.81 | 35.04 x 13.46 x 26.50 | 37.24 x 16.14 x 31.89 | 37.24 x 16.14 x 31.89 | 38.58 x 16.34 x 38.39 | 38.58 x 16.34 x 38.39 |
| Outdoor Package Dimension WxDxH (inch) | 36.02 x 14.57 x 24.21 | 39.17 x 15.67 x 29.13 | 42.91 x 19.68 x 34.84 | 42.91 x 19.68 x 34.84 | 45.08 x 19.68 x 42.52 | 45.08 x 19.68 x 42.52 |
| Outdoor Outdoor Fan Motor Speed(Hi/Mid/Lo) (r/min) | 840/700/650 | 810/700/450 | 850/700/500 | 800/750/500 | 850/800/750/650 | 850/800/750/650 |
| Outdoor Compressor Type | ROTARY | ROTARY | ROTARY | ROTARY | ROTARY | ROTARY |
| Outdoor Compressor Model/Brand | KSN140D58UFZ/GMCC | KTM240D46UKT2/GMCC | KTF250D22UMT/GMCC | KTF310D43UMT/GMCC | MTH550UKPC8FU/GMCC | MTH550UKPC8FU/GMCC |
A-Coil Specifications
| Indoor Product Number | TZID36H520ZACC | TZID36H520ZACC | TZID60H520ACC | TZID60H520ACC |
|---|---|---|---|---|
| Outdoor Product Number | TZID30H520ZCS | TZID36H520ZCS | TZID48H520ZCS | TZID60H520ZCS |
| Cabinet Size | 21 | 21 | 21.625 | 21.625 |
| IDU Power Supply(Volts; Hz; Phase) | 24V,60Hz,1Ph | 24V,60Hz,1Ph | 24V,60Hz,1Ph | 24V,60Hz,1Ph |
| ODU Power Supply(Volts; Hz; Phase) | 208/230,60Hz,1Ph | 208/230,60Hz,1Ph | 208/230,60Hz,1Ph | 208/230,60Hz,1Ph |
| Cooling Capacity (Btu/h) | 29000 | 36000 | 47000 | 51000 |
| Cooling Input (W) | 2900 | 3530 | 4950 | 6000 |
| Cooling Current (A) | 11 | 13.9 | 19.5 | 24.1 |
| SEER2 (Btu/h/W) | 15.4 | — | 14.7 | 14.5 |
| EER2 (Btu/h/W) | 10 | 10.2 | 9.5 | 8.5 |
| Cooling Capacity Range (Btu/h) | 12,800~33,700 | 10,400~38,800 | 15,500~47,000 | 15,500~51,000 |
| Cooling Input (range) (W) | 1,050~3,240 | 630~3,600 | 1,430~5,050 | 1,430~6,100 |
| Cooling Current(range) (A) | 3.5~12.5 | 3.3~12.5 | 4.9~22 | 3.3~24.5 |
| Heating Capacity (Btu/h) | 32000 | 36000 | 47000 | 49000 |
| Heating Input (W) | 3370 | 3103 | 5010 | 5360 |
| Heating Current (A) | 10.5 | 11.7 | 20 | 21 |
| HSPF2-4 (Btu/h/W) | 8.5 | 8.7 | 8 | 8 |
| HSPF2-5 (Btu/h/W) | 6.8 | 7 | 6.5 | 6.5 |
| COP (W/W) | 2.78 | 3.4 | 2.75 | 2.68 |
| Moisture removal (kg/h) | 4 | 4 | 4 | 4 |
| Outdoor MINIMUM CIRCUIT AMPACITY (A) | 22.5 | 24 | 36 | 39 |
| Outdoor MAX.FUSE (A) | 25 | 30 | 40 | 40 |
| Outdoor Outdoor air flow (CFM) | 3002 | 2413 | 3037 | 3037 |
| Outdoor noise level (Hi) (dB(A)) | 60 | 63 | 65 | 65 |
| N.A. Design pressure (PSI) | 550 / 340 | 550 / 340 | 550 / 340 | 550 / 340 |
| Outdoor Refrigerant type/Charge (oz) | R454B / 92 | R454B / 116 | R454B / 134 | R454B / 134 |
| Outdoor Additional charge (oz/ft) | 0.7 | 0.7 | 0.7 | 0.7 |
| Outdoor Throttle type | EXV | EXV | EXV | EXV |
| Liquid side (in) | 3/8’’ | 3/8’’ | 3/8’’ | 3/8’’ |
| Gas side (in) | 3/4’’ | 3/4’’ | 3/4’’ | 3/4’’ |
| Max. Piping Length (ft) | 164 | 246 | 246 | 246 |
| Max. Height Difference (ft) | 82 | 98.4 | 98.4 | 98.4 |
| Indoor Unit Net/Gross weight (lb) | 64 / 74 | 64 / 74 | 97 / 115 | 97 / 115 |
| Indoor Unit Dimension WxDxH (inch) | 21 x 21 x 24 | 21 x 21 x 24 | 21-5/8 x 21-1/2 x 27-3/4 | 21-5/8 x 21-1/2 x 27-3/4 |
| Indoor Package Dimension WxDxH (inch) | 20-1/2 x 26-1/8 x 26-3/8 | 20-1/2 x 26-1/8 x 26-3/8 | 31-1/8 x 25 x 25-5/8 | 31-1/8 x 25 x 25-5/8 |
| Outdoor Unit Net/Gross weight (lb) | 142 / 152 | 153 /164 | 193 /224 | 193 /224 |
| Outdoor Unit Dimension WxDxH (inch) | 37-1/4 x 16-1/8 x 31-7/8 | 37-1/4 x 16-1/8 x 31-7/8 | 38-9/16 x 16-3/8 x38-3/8 | 38-9/16 x 16-3/8 x38-3/8 |
| Outdoor Package Dimension WxDxH (inch) | 42-7/8 x 19-5/8 x 34-7/8 | 42-7/8 x 19-5/8 x 34-7/8 | 45-1/16 x 19-11/16 x 42-1/2 | 45-1/16 x 19-11/16 x 42-1/2 |
| Outdoor Outdoor Fan Motor Model | ZKFN-120-8-2 | ZKFN-120-10-1L | ZKFN-250-10-1 | ZKFN-250-10-1 |
| Outdoor Outdoor Fan Motor Speed(Hi/Mid/Lo) (r/min) | 850/700/500 | 800/750/500 | 850/800/750/650 | 850/800/750/650 |
| Outdoor Compressor Type | ROTARY | ROTARY | ROTARY | ROTARY |
| Outdoor Compressor Model/Brand | KTF250D22UMT/GMCC | KTF310D43UMT/GMCC | MTH550UKPC8FU/HIGHLY | MTH550UKPC8FU/HIGHLY |