1. Introduction
The KING KB ECO2S+ series unit heater provides efficient and user-friendly heating for various spaces. This model, KB2405-1-ECO2S-PLUS, features a 5KW / 240V power output, 2-stage heating, and an integrated electronic thermostat with a remote control and remote temperature sensor for optimal comfort and energy savings. It is designed for use as primary or supplemental heat sources in warehouses, stores, or large garages.
Caractéristiques principales :
- Smart ECO2S+ Energy-Saving Design
- 2-Stage Heating: Automatically uses the lowest wattage needed for heating.
- Includes ECO2S+ Remote Temperature Sensor for precise temperature monitoring.
- Built-In Provision for Optional 24V Remote Thermostat, compatible with NEST and other 24V Wi-Fi thermostats.
- Integrated fan-only and timer modes.
- Spiral steel elements and high CFM for even air distribution and prolonged heater life.
- Universal wall/ceiling bracket for simple installation.
2. Informations importantes sur la sécurité
Read all instructions before installing or using this heater. Failure to follow these instructions may result in electric shock, fire, property damage, or personal injury.
- Sécurité électrique : Installation must be performed by a qualified electrician in accordance with all applicable local, state, and national electrical codes. Ensure the power supply is disconnected before any service or installation.
- Montage: Securely mount the heater using the provided universal bracket to a structural support capable of holding the unit's weight. Maintain proper clearances from combustible materials as specified in the installation section.
- Opération: Do not operate the heater with the grill removed. Do not block air inlets or outlets. Keep flammable materials away from the heater.
- Entretien: Coupez l'alimentation électrique avant de procéder au nettoyage ou à toute opération de maintenance.
3. Contenu du colis
Vérifiez que tous les articles sont présents et non endommagés à l'ouverture du colis :
- KING KB ECO2S+ Unit Heater (5KW / 240V)
- Universal Wall/Ceiling Mounting Bracket
- Télécommande
- ECO2S+ Remote Temperature Sensor
- Heavy-Duty Pigtail (for electrical connection)
- Installation Hardware (lag bolts, nuts, grommet)
- Manuel d'utilisation

This image displays the main heater unit, a black remote control, a white remote temperature sensor, and a grey universal mounting bracket, all included in the product package.
4. Installation
4.1 Montage du chauffage
The universal mounting bracket allows for both wall and ceiling installation. Ensure the mounting surface is structurally sound to support the heater's weight (approximately 40 lbs). Use appropriate lag bolts or expansion bolts provided in the hardware pack.
- Attach the universal bracket to the desired wall or ceiling location using appropriate fasteners.
- Align the heater unit with the bracket and secure it using the large knobs on the sides, allowing for angle adjustment.
- Adjust the heater angle to direct airflow as needed. The bracket offers four adjustable positions.

This image shows the back of the grey heater unit with a protective grill covering the fan. Mounting holes are visible on the sides for attaching the universal bracket.
4.2 Câblage électrique
This heater requires a 240V dedicated circuit. Installation must be performed by a licensed electrician. The 5KW model typically requires a 40-amp breaker and 4-8 AWG copper wire. Ensure all local electrical codes are followed.
- Débrancher l'alimentation : Turn off power at the main circuit breaker before beginning any wiring.
- Compartiment d'accès au câblage : Locate and remove the single Phillips screw on the side panel to open the wiring compartment.
- Remove Knockout: Select an appropriate knockout on the side of the heater for your wiring. Use pliers to remove the knockout.
- Installer le dispositif anti-traction : Insert the provided grommet with integral strain relief into the knockout hole.
- Connecter les fils :
- Connect the black wire to the L1 terminal.
- Connect the red wire to the L2 terminal.
- Connect the green (ground) wire to the grounding screw.
- Câblage sécurisé : Tighten the strain relief to prevent the wire from pulling out and to protect the wiring from damage.
- Fermer le compartiment : Reattach the access panel with the Phillips screw.
- Restaurer l'alimentation : Mettez le courant au niveau du disjoncteur principal.

This image shows the internal wiring compartment of the heater with various colored wires connected to terminals (L1, L2, and ground) and a circuit board. A label indicates "Red Wire L2" and "Black Wire L1" for 240V, 4-8AWG connections.
Video 1: This video demonstrates the electrical wiring process for the KING KB ECO2S+ heater, showing how to connect the power cable to the internal terminals and secure it with a strain relief. It also highlights the 2-stage heating feature and remote temperature sensing.
4.3 External Thermostat Switch
On the back of the heater, there is a toggle switch to select between the built-in thermostat (setting I) and an external thermostat (setting II). For most applications using the integrated controls, ensure the switch is set to 'I'. If connecting to an external 24V thermostat (e.g., Nest), set the switch to 'II' and ensure proper wiring by a licensed electrician.
5. Mode d'emploi
5.1 Mise sous tension initiale
Upon initial power-up, the unit will beep, and the display will show the current room temperature. This indicates correct voltage et alimentation électrique.
5.2 Panneau de commande et télécommande
The heater can be operated via the integrated control panel or the included remote control. The remote control offers convenient access to all functions from a distance.

This image shows the front of the grey heater unit with horizontal louvers and a digital control panel at the bottom. The control panel has buttons for Power, Mode, Start/Stop, and Up/Down arrows, along with a digital temperature display.
Modes de fonctionnement 5.3
Appuyez sur le bouton « Mode » pour parcourir les modes de fonctionnement disponibles :
- Faible chaleur : Fournit une puissance calorifique inférieure.
- Mode écologique: Automatically adjusts wattage to the lowest level needed to maintain the set temperature, optimizing energy efficiency.
- Fan seulement: Circulates air without heating, useful for summer or general ventilation.
- Forte chaleur : Fournit une puissance calorifique maximale.
5.4 Réglage de la température
Use the Up/Down arrow buttons on the control panel or remote to set your desired temperature. The heater will maintain this temperature automatically.
5.5 Fonction minuterie
The timer mode allows you to set the heater to run for a predetermined length of time, after which it will automatically shut off. This feature helps conserve energy and provides convenience.
6. Entretien
Un entretien régulier garantit des performances optimales et une longue durée de vie à votre appareil de chauffage. Coupez toujours l'alimentation électrique avant toute intervention.
- Nettoyage: Nettoyez périodiquement l'extérieur du radiateur avec un chiffon doux et sec.amp cloth. Ensure the air inlets and outlets are free from dust and debris. Do not use abrasive cleaners or solvents.
- Inspections : Annually inspect electrical connections for tightness and signs of wear. Check the mounting bracket for security.
- Fan: Ensure the fan operates smoothly and is free from obstructions.
7. Dépannage
Si votre chauffage ne fonctionne pas correctement, consultez les problèmes courants et leurs solutions ci-dessous :
| Problème | Cause possible | Solution |
|---|---|---|
| Heater does not turn on / No display. | No power to the unit or incorrect voltage. | Check circuit breaker. Ensure 240V power is supplied. Verify wiring connections are secure. |
| Le chauffage est allumé mais ne produit pas de chaleur. | Thermostat switch set to external, or external thermostat not calling for heat. | Ensure the external thermostat switch on the back of the unit is set to 'I' for internal thermostat control. If using an external thermostat, check its settings. |
| Chauffage insuffisant. | Incorrect mode selected, or obstructions. | Select 'High Heat' mode. Ensure air inlets/outlets are clear. Check louvers are directed appropriately. |
| La télécommande ne fonctionne pas. | Piles déchargées ou obstruction. | Remplacez les piles de la télécommande. Assurez-vous qu'aucun obstacle ne se trouve entre la télécommande et le radiateur. |
8. Spécifications
- Marque: ROI
- Modèle: KB2405-1-ECO2S-PLUS
- Puissance de sortie : 5 kW
- Voltage: 240V
- Ampâge : 20.8 Amps
- Nombre de vitesses : 2 (faible, élevé)
- Type de carburant : Électrique
- Caractéristiques spéciales : Energy Efficient, Remote Control, Remote Temperature Sensor, 2-Stage Chauffage
- Couleur: Noir
- Facteur de forme : Armoire
- Utilisation intérieure/extérieure : Intérieur
- Type de montage : Wall Mount (Universal bracket included)
- Dimensions du produit : 16.5 x 15 x 13.5 pouces
- Poids de l'article : 40 livres
- Code à barres : 093319332399
- Première disponibilité : 29 septembre 2020

This chart provides guidance on selecting the appropriate heater wattage based on garage size (1-car to 4-car garages), square footage, BTU, CFM, and amperage. The 5KW model is suitable for 1-car garages up to 450 sq. ft.
9. Garantie et assistance
For specific warranty details, please refer to the documentation included with your product or contact KING customer support. General product protection plans may be available for purchase separately.
- Retours : This product typically offers a 30-day easy return policy.
- Plans de protection : Optional 4-Year Protection Plans and Complete Protect monthly plans may be available for extended coverage.
- Assistance clientèle : For technical assistance or service inquiries, please visit the KING store on Amazon or refer to the contact information provided in your product packaging.
Visit the official KING Store for more information: KING Store





