Marley Q-Mark HBB Series Elect...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$528.25
Marley Q-Mark HBB Series Electric Hydronic Baseboard Heater, Navajo White

Marley Q-Mark HBB Series Electric Hydronic Baseboard Heater, Navajo White

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Model: HBB754

In Stock (leaves warehouse same day if ordered before 3pm ET)

$528.25
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Marley Q-Mark HBB Series Electric Hydronic Baseboard Heater, Navajo White

The Marley Q-Mark HBB Series delivers electric hydronic baseboard heating for residential and light commercial spaces, with dual-voltage flexibility that lets a single lineup serve either a 208-Volt or 240-Volt circuit. Depending on the length selected, output ranges from 500W to 1500W, and units are available in 2'4", 2'10", 3'10", 4'10", and 5'10" lengths to match room size. Each unit heats a sealed liquid medium inside the housing for steady, even radiant-style warmth rather than the sharp on/off cycling common to bare-element heaters. Finished in a neutral Navajo White, the HBB Series blends into standard wall trim and interior finishes in any room needing supplemental heat.

Key Features

  • Dual Voltage Output: Wired to a 208-Volt or 240-Volt circuit, so installers can match the unit to either common residential or commercial service without needing a separate model.
  • Wattage Range: Output spans 500W to 1500W across the HBB Series lineup, sized to the length selected for the space being heated.
  • Length Options: Available in 2'4", 2'10", 3'10", 4'10", and 5'10" models to fit the wall run of the room.
  • Hydronic Heating Element: Electric hydronic construction heats a sealed liquid medium for steady, even radiant-style warmth instead of sharp on/off cycling from bare-element heaters.
  • Navajo White Finish: A neutral cabinet finish coordinates with most wall colors and existing trim for a clean, unobtrusive look.
  • Low-Profile Baseboard Housing: Installs along the wall line at floor level, preserving usable floor and wall space compared to bulkier heating units.
  • Zone Heating Capability: Sized for room-by-room supplemental heating, allowing targeted comfort control without running a full central heating zone.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Supplemental Zone Heating in Homes and Offices
  • Residential and Light Commercial Interior Spaces
  • Rooms Wired for 208-Volt or 240-Volt Electrical Service
  • Renovation and New Construction Heating Upgrades
  • Bedrooms, Living Areas, and Small Offices Needing Baseboard Heat

Why Marley?

Marley's Q-Mark HBB Series pairs hydronic heating technology with dual-voltage flexibility, giving contractors and homeowners a lineup that adapts to either a 208-Volt or 240-Volt circuit on the job site and scales from 500W to 1500W across five lengths. The Navajo White finish is designed to fit cleanly into finished living spaces without drawing attention, making the HBB Series a practical choice for reliable supplemental heating in the room where it is installed.

Product Specs

Product Type:
Baseboard Heater
Voltage Rating:
208/240V
Series:
HBB
Product Color:
Navajo White
Department:
Electrical
Product Group:
Heating
list_batch:
MAR-20260910
Product Subgroup:
Heaters

Marley HBB754 – Frequently Asked Questions

1) Can the Marley Q-Mark HBB baseboard heater run on both 208V and 240V circuits?
Yes. The HBB Series hydronic baseboard is rated 208/240V, so the same unit can be wired to either a 208-volt or a 240-volt circuit. That means one part number covers both common residential and light commercial services, and you don't have to stock two versions for a mixed building. Output drops at 208V as it does with any dual-rated resistance heater, so size the length to the room at the voltage you're actually feeding it.
2) Which HBB part number do I order for the length of wall I have?
Five lengths are offered, each with its own Q-Mark part number: HBB504 at 2 feet 4 inches, HBB754 at 2 feet 10 inches, HBB1004 at 3 feet 10 inches, HBB1254 at 4 feet 10 inches, and HBB1504 at 5 feet 10 inches. The numeral in the part number tracks the wattage, so HBB504 is the 500W unit and HBB1504 the 1500W, with the series spanning 500W to 1500W.
3) Does the HBB hydronic baseboard come with a built-in thermostat, or do I need a separate control?
The HBB is sold as the heater body only, with no integral thermostat called out. Plan on a control: either a wall-mounted line-voltage thermostat rated for the 208/240V circuit and the heater's amp draw, or a Q-Mark built-in thermostat kit if you want the control on the unit. Size the thermostat to the total connected wattage if you're ganging more than one length on a single circuit.
4) What is the difference between a hydronic baseboard heater and a standard electric baseboard?
A standard electric baseboard heats a bare resistance element directly, so it swings hot and cold with the thermostat. The Q-Mark HBB heats a sealed liquid inside the housing instead, and that liquid holds heat, giving steadier radiant-style warmth without the sharp on/off cycling. Both are 240V-class electric heaters wired the same way; the hydronic version is the choice where occupants complain about temperature swing or hot-element smell. If first cost matters more than comfort evenness, a bare-element convection baseboard does the same wattage job.
5) Is the Marley HBB suitable as the only heat source in a room, or just supplemental?
At 500W to 1500W per unit the HBB is sized for room-by-room zone heating, which covers supplemental duty in bedrooms, living areas and small offices, and can serve as primary heat in a small, well-insulated room. For a larger space, run more than one length on the wall rather than stretching a single 1500W unit past what it can cover.
6) Can I install Marley HBB hydronic baseboard in a commercial office, or is it residential only?
Both. Q-Mark lists the HBB Series for residential and light commercial interior spaces, which is why the dual 208/240V rating matters, 208V being the usual single-phase leg off a commercial three-phase service. Typical uses are offices, bedrooms and living areas, and renovation or new-construction heat upgrades.
7) Will a Marley HBB baseboard heater match the other baseboards already in my building?
The HBB cabinet is finished in Navajo White, Q-Mark's neutral off-white, which is the standard finish on their residential baseboard line and blends with typical white wall trim. For a property manager replacing one unit in a run of rooms, the colour will read as a match against other off-white baseboards; it is not a bright white, so a side-by-side swap next to a pure white cabinet may show slightly.
8) Where can I get the submittal sheet and wiring instructions for the Q-Mark HBB?
Q-Mark publishes an HBB Hydronic Baseboard submittal sheet for spec and approval packages, plus a full installation, operation and maintenance instruction document covering wiring and mounting, and the 2025 Q-Mark digital catalog for the wider line. All three are available with the HBB Series as PDFs.
How fast can I get the Marley HBB754 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Marley HBB754 come with a warranty?
Absolutely. The Marley HBB754 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Marley HBB754?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Marley HBB754 from ZenSupply?
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