Marley QMKVFK404F Wall Heater,...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$722.89
Marley QMKVFK404F Wall Heater, 240/208V, 4000/3000W

Marley QMKVFK404F Wall Heater, 240/208V, 4000/3000W

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Model: VFK404F

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

$722.89
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Marley QMKVFK404F Wall Heater, 240/208V, 4000/3000W

The Marley QMKVFK404F Wall Heater is a dual-voltage electric heating unit built for reliable performance in commercial and industrial spaces. Rated for 240/208V electrical service, this wall-mounted unit delivers up to 4000W of heating output at 240V or 3000W at 208V, giving installers the flexibility to match heating capacity to the building's available power supply. Its wall-mount configuration makes it a practical choice for supplemental or primary space heating where floor-standing or ceiling-mounted equipment is not practical, and its dual-wattage rating simplifies stocking a single unit for two common service voltages. Because commercial buildings are frequently wired for either 240V single-phase or 208V service derived from a three-phase system, a heater that is rated for both voltages helps electrical contractors and facility managers avoid mismatched equipment and simplifies inventory planning across multi-building portfolios.

Key Features

  • Dual Voltage Compatibility: Operates on 240V or 208V electrical service, giving installers flexibility to match the unit to the building's available power supply without swapping equipment.
  • Multi-Watt Output: Delivers 4000W of heating capacity at 240V or 3000W at 208V, so heat output scales automatically to the connected service voltage.
  • Wall-Mounted Configuration: Designed as a wall-mount unit, making it well suited for installations where floor space is limited or ceiling mounting is impractical.
  • Model QMKVFK404F: Identified under the Marley QMKVFK404F model designation for accurate cross-referencing during specification, ordering, and replacement.
  • Voltage-Matched Performance: Because output wattage is tied to the connected voltage, the unit is designed to be specified against the exact electrical service on site rather than a single fixed rating.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Commercial and Industrial Space Heating
  • Wall-Mounted Supplemental Heating Installations
  • Renovation and New Construction Electrical Projects
  • Facilities Requiring Flexible 240V/208V Service Compatibility
  • Replacement of Existing Wall Heater Units During Retrofits

Why Marley?

Marley Engineered Products has long been a recognized name in electric heating equipment for commercial and industrial applications. The QMKVFK404F's dual-voltage, multi-watt design reflects Marley's focus on giving contractors and facility managers flexible, adaptable heating options that fit the electrical service already in place. Rather than forcing a facility to standardize on a single voltage, the QMKVFK404F is built to perform predictably whether the connected circuit is 240V or 208V, reducing the risk of ordering the wrong equipment for a given job. Specifying Marley means choosing equipment built for dependable, professional-grade performance in the demanding electrical environments where wall-mounted heating is required.

Product Specs

Product Type:
Wall Heater
Voltage Rating:
208/240V
Department:
Electrical
Product Group:
Heating
list_batch:
MAR-20260910
Product Subgroup:
Heaters

Marley VFK404F – Frequently Asked Questions

1) Can the Marley QMKVFK404F wall heater run on 208V, or does it need a full 240V circuit?
It runs on either. The QMKVFK404F is rated 208/240V, and the output follows the connected service: 4000W on 240V, 3000W on 208V. So if your building is fed 208V from a three-phase panel, the heater still works correctly, you just size the heat load around 3000W rather than 4000W.
2) I'm sizing heat for a 208V commercial space. Which wattage do I design to with the VFK404F?
Design to 3000W. The nameplate 4000W figure is the 240V rating; on 208V service the same unit produces 3000W. Resistance heaters derate with voltage, so there is no way to get the full 4000W out of a 208V feed. If your load calc needs 4000W at 208V, you need a larger unit or a second heater.
3) Is the QMKVFK404F a fan-forced heater or a radiant/convection unit?
Fan-forced. The VFK404F is a fan-forced wall heater, so it moves air through a heating element rather than relying on natural convection or radiant panels. That makes it the right pick when you need to push heat into an open commercial space quickly; radiant panels are the better choice for spot comfort or high-ceiling areas where air movement is a problem.
4) Can the VFK404F replace an existing wall heater in a retrofit, or is it only for new construction?
Both. Marley lists the VFK404F for replacement of existing wall heater units during retrofits as well as new construction electrical work. The deciding factors on a retrofit are the existing wall cavity and can, and whether the branch circuit matches 208V or 240V, since the heater is rated for either.
5) What part number do I give my distributor for the Marley 4000W 240V wall heater?
Order by Marley model VFK404F, catalogued as QMKVFK404F (QMark is Marley's brand designation on this line). That single model number covers both the 240V/4000W and 208V/3000W ratings, so there is no separate voltage part number to specify.
6) Why would I stock one dual-voltage wall heater across a multi-building portfolio?
Because commercial buildings are wired either 240V single-phase or 208V off a three-phase service, and a 208/240V rated heater drops into both. For a property manager or MRO buyer, that means one shelf SKU (VFK404F) covers both voltages instead of two, and a crew pulling a unit for a service call cannot grab the wrong voltage.
7) Where should I use a wall-mounted heater like this instead of a floor or ceiling unit?
Wall mounting suits spaces where floor area is committed or a ceiling drop is impractical, which is what the VFK404F is built for. Typical use is commercial and industrial space heating, either as the primary source in a small room or as supplemental heat in an area the central system does not reach.
How fast can I get the Marley VFK404F 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 VFK404F come with a warranty?
Absolutely. The Marley VFK404F 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 VFK404F?
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 VFK404F from ZenSupply?
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