Gree FLEXX R-410A Heating Element (FLEXXHTR Series)
The genuine Gree heat kit for R-410A FLEXX air handlers, to replace or add backup heat.
AirGreen codeAG-AC-01905
514 316-2973 · sales@airgreen.ca
Quick facts
The Gree FLEXXHTR heating element is the genuine auxiliary heat for FLEXX R-410A air handler cabinets (FLEXX24 to FLEXX60HP230V1, AH and BH versions). It is installed in the cabinet’s electrical box, with its breaker, and connects to the L1 and L2 terminals.
Replace or add auxiliary heat without changing the system
Many FLEXX R-410A central heat pumps are still in service. When the element fails or more auxiliary heat is needed, the genuine Gree part avoids modifying the cabinet. For each element, Gree publishes the minimum circuit ampacity and the maximum breaker size, at 240 V and at 208 V.
Outputs and approved cabinets
- FLEXXHTR5KW (21-4227-00) and FLEXXHTR8KW (21-4216-00): FLEXX24 and FLEXX36.
- FLEXXHTR10KW (21-4216-01): FLEXX24, 36, 48 and 60.
- FLEXXHTR15KW (21-4217-00): FLEXX36, 48 and 60, two circuits.
- FLEXXHTR20KW (21-4228-00): FLEXX48 and 60, two circuits.
Gree’s instructions
Cut all power and remove voltage from the cabinet’s L1 and L2 terminals before connecting the element: Gree warns of a fire hazard. Use copper conductors. The element’s breaker serves as a service disconnect, not as overcurrent protection. For 15 and 20 kW, the FLEXXSPCKIT jumper bar brings the element down to a single power supply.
Installed by AirGreen across Greater Montréal
We service Gree central heat pumps and replace their elements, with a master electrician for the connection, in Montréal, Laval, Longueuil, on the South Shore and on the North Shore. RBQ licence 5645-9605-01. For availability or a quote, call us at 514 316-2973 or email sales@airgreen.ca with your cabinet model and the output you need.
The original backup heat for an R-410A FLEXX
Your R-410A FLEXX heat pump keeps its air handler: the Gree heat kit goes in exactly as designed.
- Replacing a burnt or damaged heater on an R-410A FLEXX air handler
- Adding backup heat to an air handler installed without one
- Moving to a larger output, within the air handler’s limit
- Emergency heat during an outdoor unit failure
5 sizes, one page
Each size has its own AirGreen code. Tap a row to select it.
| Model | Part no. | Output (240 / 208 V) | Minimum circuit ampacity (240 / 208 V) | Maximum breaker (240 / 208 V) | Allowed air handlers | AirGreen code |
|---|---|---|---|---|---|---|
| 5 kW – FLEXXHTR5KW | 21-4227-00 | 5 / 3.76 kW | 26 / 22.6 A | 30 / 25 A | FLEXX24, FLEXX36 | AG-AC-01901 |
| 8 kW – FLEXXHTR8KW | 21-4216-00 | 8 / 6 kW | 41.7 / 36 A | 45 / 40 A | FLEXX24, FLEXX36 | AG-AC-01902 |
| 10 kW – FLEXXHTR10KW | 21-4216-01 | 10 / 7.51 kW | 52 / 45 A | 60 / 45 A | FLEXX24, 36, 48, 60 | AG-AC-01903 |
| 15 kW – FLEXXHTR15KW | 21-4217-00 | 15 kW at 240 V | 52 and 26 / 45 and 22.6 A | 60 and 30 / 45 and 25 A | FLEXX36, 48, 60 | AG-AC-01904 |
| 20 kW – FLEXXHTR20KW | 21-4228-00 | 20 kW at 240 V | 52 and 52 / 45 and 45 A | 60 and 60 / 45 and 45 A | FLEXX48, FLEXX60 | AG-AC-01905 |
Output at 240 V. The air handler size limits the heater you can use.
Specifications
From the manufacturer’s documentation. A value the manufacturer does not publish is not listed.
What to know before installing
- Check the air handler size: 5 and 8 kW on FLEXX24 and FLEXX36, 10 kW on all, 15 kW from FLEXX36, 20 kW on FLEXX48 and FLEXX60.
- Copper conductors only, per Gree.
- Remove line voltage from the air handler L1 and L2 terminals before connecting the heater: Gree warns of a fire risk.
- The electrical connection is a job for a licensed electrician.
Manufacturer documents
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Frequently asked questions
Which kit fits my FLEXX air handler?
Per Gree’s submittals: FLEXX24 takes 5, 8 and 10 kW; FLEXX36 takes 5, 8, 10 and 15 kW; FLEXX48 and FLEXX60 take 10, 15 and 20 kW. Send us your air handler model number and we confirm before ordering.
Is my system R-410A or R32?
The outdoor unit and air handler nameplates say so. R32 FLEXX ULTRA and FLEXX ECO air handlers use different heaters, on a separate page.
Do I need two circuits?
The 15 and 20 kW kits have two power circuits. Gree’s FLEXXSPCKIT jumper bar lets you combine them on a single supply.
Can you install it?
Yes. We fit the kit in the air handler and coordinate the connection with a licensed electrician, everywhere in Greater Montréal.
Keep your FLEXX’s original backup heat
Tell us the size and the quantity: we confirm availability and send you a quote. Or let our technicians install it for you.
Specifications from the manufacturer’s documentation, checked on October 7, 2026.