Q-Mark HBB500 Hydronic Baseboard Heater

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  • Q-Mark HBB500 Electric Hydronic Baseboard Heater with Large Diameter Reservoir
  • Offers Steel Louvered Grilles and 500 Watts of Superior Heating
4.5 Star Rating: Good
Availability: In Stock - Ships today if ordered by 1:00PM(PST)
List Price: $199.00
Price Break: $43.28
Our Price: $155.72
Get 5% OFF YOUR ORDER TODAY Use Code HEAT at checkout
AC Outlet ($34.58)
Duplex Receptacle ($38.95)
Inside Corner ($41.95)
Outside Corner ($45.95)
24 hour shipping


Q-Mark Siver Medal

Create the perfect indoor environment with the Q-Mark HBB500 electric hydronic baseboard heater. This exceptional choice offers superior heating at a rapid rate. Relax in warm comfort in minutes.

Automatic Shut Off
The Q-Mark HBB500 electric hydronic baseboard heater offers automatic shut off for added safety. This useful feature shuts the heater off if it gets too hot, a great benefit that prevents overheating.

Complementary Finish
The Q-Mark HBB500 electric hydronic baseboard heater includes a complementary white finish to match virtually any home decor. Wherever you install this baseboard heater, it'll blend with the furnishings.

Louvered Grilles
The Q-Mark HBB500 electric hydronic baseboard heater includes heavy-duty steel louvered grilles that protect the heating elements and direct heat outward and into the room. This added benefit makes this heater a great choice.

High Strength Lexan
The Q-Mark HBB500 electric hydronic baseboard heater is well constructed from high strength Lexan, a durable plastic that resist scratches and wear marks. This durable designer style heater will look great for years to come.


  • Model: HBB500
  • Product Type: Hydronic Baseboard Heater
  • Product Dimensions: 28.00 x 2.90 x 6.75
  • Product Weight: 9.70
  • Product Color: Navajo White
  • Application: Ideal for heating bathrooms and small areas up to 50 square feet
  • Type: Baseboard Heater
  • Fuel Type: Electric
  • Coverage Area: 50 square feet
  • Voltage: 120 volts
  • Watts: 500 watts
  • Amps: 4.2 amps
  • Certifications: UL
  • Heating Element: Sheathed Electronic Heating Element
  • Heating Capacity: 1706 BTUs
  • Finish: Navajo White
  • Construction: Plastic
  • Hardwired: Yes
  • Remote Control: No
  • Control Type: Dial
  • Fin: Yes
  • Thermostat Required for Use: Yes
  • Thermostat Must Be Purchased Separately: Yes
  • Automatic Cut-Off Fetaure: Yes
  • Low Surface Temperature: Yes
  • Safe to Mount Against Walls: Yes
  • Flooring Types Recommended For Use: Carpet, Hardwood, Tile
  • Portable: No


  • Automatic shut off to prevent overheating
  • Flush mount to any wall or flooring for added convenience
  • Heavy-duty steel louvered grilles protects the heat source
  • Keeps radiating heat even after it shuts off
  • Large diameter reservoir increases the thermal constant of the heater
  • Low surface temperature makes this great for families

Optional Accessories Available For The QMark Baseboard Heater HBB Models


25 amp at 120-277 Single Pole Thermostat HBBT1: Single pole thermostats break only one side of the power line to your heater and cannot be turned ''off.'' Therefore, power is continuous to the heater even if it is not running. The control knob will have a low temperature setting without an ''off'' position. These thermostats generally have a temperature range of 40 to 90 degrees. The thermostat attaches in the end cap of the heater.

Duplex Receptacle 15 amps at 120 VAC HBBDR: An optional accessory that attaches and makes an additional two plug outlets for any baseboard heater. This accessory will add 8 inches to the length of the baseboard heater as it attaches to the end cap of the heater.

25 amp at 120-277 VAC Double Pole Thermostat HBBT20: A "Double Pole" is an older term for a switch that allows you to turn both sides of the filament on and off - actually turning it completely off making it much safer than leaving it always energized. Double pole thermostats should be used for zonal heat systems such as electric fan heaters, baseboard heaters, and radiant heaters. This thermostat attached within the end cap.

Two Pole Tamper-Proof Thermostat: A standard two pole thermostat but with a tamper proof guard that resembles a small disc covering, which is only removable with a screwdriver. Once it is off, an inside stem is clearly visible. This is then rotated with a screwdriver or with your fingers. This thermostat attached within the end cap.

Inside Corner CBDCIC: Allows two baseboard heaters to be set up next to each other on walls that are at a right angle to each other. If you were standing in the corner, the point of the corner would point away from you.

Outside Corner CBDCOC: If you were facing the point of this corner, it would be pointing towards you..

AC Outlet 20 Amps at 208/240 VAC HBBAC: This accessory enables you to install a 240 volt 20 amp outlet to your baseboard heater.

Real Customer Testimonials

Sort By:
4.5 Star Rating: Good
Name: Brian
Date: 07/20/2011
Location: West Virginia
Overall Rating:
4.0 Star Rating: Good

Review Title: Works well
Comments: This unit has a nice design, and works very well - quiet (no pinging, etc), not hot to the touch while running, and warms up fairly quickly when turned on. We have it in a walk in closet, where we figured the hydronic design would add an element of safety. The only complaint I have is fit and finish, the assembly left quite a bit to be desired, and I had to take off several parts and reassemble it to get rid of gaps due to shoddy workmanship. The parts were clearly fine, though, as I was able to reassemble it perfectly.
Recommend to Friend: Yes
Name: dsred43
Date: 02/09/2011
Location: Montvale, NJ
Overall Rating:
5.0 Star Rating: Outstanding

Comments: The purchase works well for a very cold room. It is a small unit but works very well to keep the cold out. Performance is very high.
Recommend to Friend: Yes
Name: P. Wilson
Date: 12/15/2010
Location: Ohio
Overall Rating:
5.0 Star Rating: Outstanding

Review Title: Baseboard Heater
Comments: This is the second Q-Mark Hydronic heater I have purchased and installed. This heater is being used as an under counter baseboard at our computer station. The ease of installation and heat output are great. Great product. The first Q-mark was an eight foot model installed in a finished basement. Makes all the difference as this is now the most favorite spot for watching TV and hanging out. Another great product
Recommend to Friend: No
Name: arusin
Date: 02/26/2010
Location: Fairview, NJ
Overall Rating:
5.0 Star Rating: Outstanding

Review Title: baseboard install and performance
Comments: Product was recommended by an electrician who said it was top quality for the application, an unheated 1/2 bathroom. Install was easy with optional thermostat and performance has been tops, warm and toasty, even took the chill out of the tile floor.
Recommend to Friend: Yes
Name: V. Frittitta
Date: 11/30/2006
Location: Staten Island, NY
Overall Rating:
5.0 Star Rating: Outstanding

Comments: We recently Ordered the HBB500 baseboard, and Honeywell 498 thermostat. We could not be happier with the performance of the items. This line of electric baseboard heater is by FAR the finest I have ever used.
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