Connection Terminal Block (Required for 12, 15 and 20 kW) Gree – B04537
The Gree terminal block designed to connect the 12, 15 and 20 kW electric heaters of a FLEXX air handler.
AirGreen codeAG-AC-114
514 316-2973 · sales@airgreen.ca
Quick facts
The Gree B04537 connection terminal block is designed for wiring the 12, 15 and 20 kW electric heating elements of FLEXX air handler cabinets. It is a small part, but without it, installing a large auxiliary heating element can stall partway through the job.
A part to order with the element
The higher the element’s output, the more current it draws. According to Gree’s spec sheet, some high-output FLEXX elements are fed by two circuits. The connection must therefore be planned at the load calculation and ordering stage, not on installation day. We include the terminal block in the same quote as the element so the work gets done in a single visit.
Before you order
- The full model number of the FLEXX cabinet
- The output of the element you want: 12, 15 or 20 kW
- The capacity of the electrical panel, checked by a master electrician
Safety
Shut off all power sources before opening the cabinet. Tighten the connections to the specified torque: insufficient tightening makes the conductors overheat. Connecting an auxiliary heating element is a job for a master electrician.
Installed by AirGreen in Greater Montréal
We install auxiliary heating elements for Gree central heat pumps, along with their wiring, in Montréal, Laval, Longueuil, on the South Shore and on the North Shore, with a master electrician. 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 element output.
A part to plan with the big heaters
High-output heaters come with more than one circuit: the connection should be planned when you order.
- Installing a 12, 15 or 20 kW heater in a FLEXX air handler
- Replacing a damaged or overheated terminal block
- Upgrading a smaller heater to 12, 15 or 20 kW
- Ordering together with the heater, for a single visit
Specifications
From the manufacturer’s documentation. A value the manufacturer does not publish is not listed.
What to know before installing
- Per Gree’s submittal, some high-output FLEXX heaters have two power supplies: plan the connection with the load calculation.
- Send us the air handler model and heater output and we confirm whether you need the block before ordering.
- Disconnect every power source before opening the air handler.
- The connection is a job for a licensed electrician.
You may also need
Gree Electric Heat Element for FLEXX R32 Air Handler Cabinet
Copper Electrical Wire
Breaker for Residential Electrical Panel
Outdoor Disconnect Switch for Heat Pump
Fujitsu Leak Detection System Accessory – UTYSGZU
GENERAL AIRSTAGE Leak Detection System Accessory – UTYSGZU
Hitachi 5-Wire Adapter for 24 V Thermostat – C3STAT01
Hitachi C1STAT01 5-Wire Thermostat Adapter (airHome)Original partsSee all
Frequently asked questions
Do I need it for my heater?
It is meant for the 12, 15 and 20 kW heaters. Send us your FLEXX air handler model number and the heater output and we confirm before ordering.
Does the heater come with the block?
No, it is ordered separately. We include it in the same quote as the heater.
Does it work with a 6, 9 or 10 kW heater?
It is not meant for those outputs. We check the connection your heater needs before installation.
Can you install it?
Yes. We install it with the heater and coordinate the connection with a licensed electrician, everywhere in Greater Montréal.
Plan the right connection for your FLEXX heater
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.