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Why you’ll love it

RestaurantSupply.com is your trusted source for Hubbell electric booster heaters.

  • Authorized Hubbell dealer, ensuring genuine commercial restaurant equipment and manufacturer support
  • Fast shipping available on in-stock Hubbell J39 electric booster heaters
  • Competitive pricing backed by a 30-day price match guarantee
Additional Question? Ask an Expert

Hubbell J39 13 Inch Electric Booster Heater 9.9kW with Stainless Steel Tank

Hubbell  |  MFG #: J39  |  Item #: 546351
Item: #546351

Technical details
Manufacturer Hubbell Water Heaters
Model Number J39
Manufacturer Part # J39
Wattage 20 - 40 Kilowatts
Width 11" - 19"
Height 12.5"
Width 13.25"
Depth 13"
Weight 46 lbs
UL Yes
UL EPH Yes
cUL Yes
NSF Yes

About this item

Product Details

The Hubbell J39 Booster Heater Electric 9.9kW is a commercial-grade heating solution designed for applications requiring rapid on-demand hot water. This electric booster heater features a 3-gallon ASME-stamped stainless steel tank, insulated with environmentally friendly closed cell foam for optimal thermal retention. Powered by a 9.9kW element, it delivers consistent heating performance suitable for mid-volume foodservice operations, such as cafes, hospitals, or prep kitchens, where reliable water temperature control and compact footprint are essential.

Top Hubbell J39 Features

The Hubbell J39 booster heater offers precise temperature regulation through its electronic display controller, integrated low water cut-off, and leak detection. Its robust stainless steel construction ensures durability in demanding environments, while the compact design facilitates easy installation and maintenance in tight kitchen spaces. Ideal for supplying hot water in small to medium-sized foodservice settings, it seamlessly integrates into existing plumbing systems for workflow efficiency.

  • Wattage: 9.9kW electric heating element for rapid water temperature recovery
  • Material: ASME stamped stainless steel tank resists corrosion and ensures longevity
  • Insulation: CFC/HCFC free closed cell foam maintains temperature, reducing energy costs
  • Ease of Maintenance: Electronic controller with leak detection simplifies troubleshooting
  • Application Fit: Suitable for bench-mounted installation in commercial kitchens and prep stations

Designed for installation in regulated foodservice environments requiring reliable hot water supply with minimal space requirements.

Hubbell J39 Technical Specs

The Hubbell J39 booster heater operates on a single-phase electrical circuit with a voltage range compatible with standard commercial power supplies, typically around 208-240V at 60Hz, drawing up to 20-40 kilowatts. The unit features air-cooled technology with dimensions of approximately 13.25" width, 13" depth, and 12.5" height, weighing 46 lbs, which facilitates straightforward installation atop countertops or utility areas. Its stainless steel construction ensures food-safe, corrosion-resistant performance. The unit is UL listed and incorporates advanced features like low water cut-off and leak detection to prevent operational downtime, making it suitable for continuous, reliable hot water delivery in moderate-duty applications.

  • Electrical Requirements: 208-240V, 1-phase, 20-40kW operation
  • Cooling Method: Air-cooled for reliable thermal management
  • Production Capacity: Adequate for providing consistent hot water in small to medium foodservice operations
  • Construction & Finish: Durable stainless steel exterior with cleanable surface
  • Temperature Resistance: Operating temperature range up to maximum design limits for safe, efficient performance
  • Dimensions: 13.25" W x 13" D x 12.5" H with a shipping weight of 46 lbs
  • Food Safety: Materials compliant with industry safety standards, resistant to corrosion and contamination
  • Maintenance & Access: Easy access for inspection and servicing, with built-in leak detection and low water cutoff
  • Electrical Connection: Requires compatible wiring and circuit protection for safe operation
  • Plumbing Connection: Compatible with standard hot water plumbing lines with appropriate inlet/outlet fittings
  • Clearance Space: Adequate space around unit for airflow and maintenance access
  • Drainage & Insulation: Proper drainage provision recommended; insulated for energy efficiency
  • Integration: Designed to connect seamlessly with existing hot water systems in foodservice kitchens

What is a commercial booster heater?

A commercial booster heater is a self-contained water heating device used to quickly increase the temperature of existing hot water supplies in foodservice establishments. The Hubbell J39 booster heater is installed in small to medium-sized kitchens to provide immediate hot water for dishwashing, cleaning, or food prep, especially where existing water temperature needs boosting for compliance or efficiency. It features a 3-gallon stainless steel tank and a 9.9kW electric element, making it ideal for mid-volume operations needing reliable and efficient hot water delivery.

Top Electric Booster Heaters for Moderate Foodservice Workloads

The Hubbell J39 booster heater delivers precision electric heating tailored for moderate throughput foodservice environments. Built with corrosion-resistant stainless steel, it ensures long-term performance and seamless integration into commercial kitchens. The J39 model from Hubbell is optimized to meet the demands of cafes, healthcare facilities, and prep stations for consistent hot water supply, operation-ready in compact footprints.

  • Operation Type — Suitable for small to medium commercial kitchens
  • Kitchen Setting — Ideal for compact, constrained foodservice spaces
  • Workload Qualifier — Supports moderate throughput needs in professional kitchens
  • Use Case — Provides reliable hot water boost during peak cleaning hours

Why Choose Hubbell J39 Booster Heater Electric

Distinct from competitor models, the Hubbell J39 booster heater features a robust stainless steel tank, advanced electronic controls, and leak detection for dependable operation. Its compact size allows installation in tight spaces, while the high wattage ensures rapid water heating. This model enhances workflow efficiency by delivering a consistent hot water supply with minimal maintenance, making it a suitable choice for health-conscious, high-demand kitchen environments.

  • Self-Contained Design: Compact footprint simplifies installation in limited spaces
  • Durable Materials: ASME stamped stainless steel tank resists corrosion and scaling
  • Electronic Control: Precise temperature regulation with leak detection enhances safety
  • Energy Efficiency: Closed cell foam insulation reduces energy consumption over time
  • Reliable Performance: Meets strict UL and UL EPH standards for consistent operation

Certifications

UL Listed logo

UL Listed

The item has been tested by Underwriters Laboratories (UL) for sanitation hazard standards and meets or exceeds expectations.

NSF Listed logo

NSF Listed

The item meets the standards imposed by NSF International. These standards relate to health, public safety and the environment.

UL EPH logo

UL EPH

This item meets or exceeds ANSI/NSF requirements and complies with United Laboratories (UL) EPH standards.

cUL logo

cUL

Tested by Underwriters Laboratories and certified for use in Canada, this product meets strict Canadian safety standards.

Certifications

Customer reviews

Hubbell J39 Booster Heater Electric 9.9kW
Hubbell Water Heaters

Hubbell J39 13 Inch Electric Booster Heater 9.9kW with Stainless Steel Tank

$2,359.88 $4,495.00

Hubbell Water Heaters, J39, Booster Heater, electric, 9.9kW, 3-gallon storage capacity, ASME stamped stainless steel tank with CFC/HCFC free closed cell foam insulation, electronic display controller with low water cut-off & leak detection, stainless steel exterior, T&P relief valve, UL, cUL, 24-volt heater interlock adapter, ASME, UL EPH (ANSI/NSF 5)