Marley J1258B Convection Heater
- Model # J1258B
- Convection Heater
- 1,250 W
- 208V
- Single-phase
Marley J1258B institutional wall convector, 1250 watts at 208 volts, built with tamper-proof hardware.
$4,354.40
Available on backorder
- Genuine MarleyFactory-new unit
- Same-Day ShippingIn-stock orders by 4 PM Central
- Repair PartsParts for this model
- Expert Support800-654-3545Mon–Fri, 8 AM–5 PM Central
Need parts for the Marley J1258B?
We carry 4 replacement parts for this model, all listed on one page.
Specifications
| Model Number | J1258B |
|---|---|
| Brand | Marley |
| Type | Convection Heater |
| Wattage | 1,250 W |
| Voltage | 208V |
| Phase | Single-phase |
| Colors | Beige |
| Dimensions | 16" (H) x 5" (D) x (length varies) |
| Wattage | 1250W |
| Voltage | 208V, single phase |
| Amperage | 6.0A |
| Shipping Weight | 80 lb |
| Minimum Floor Clearance | 6 in. |
| Controls | Built-in thermostat and disconnect switch |
| Manufacturer Code | 1250W 208V 1PH INST CONV F |
| Condition | New |
| SKU | YJ1258B |
About the Marley J1258B
The Marley J1258B is a wall-mounted electric convection heater from the J Series (Model B) institutional line. It is rated 1250 watts on a 208-volt single-phase supply and draws about 6.0 amps. Heat comes from a finned element behind a perforated front cover.
The front cover is fastened with tamper-proof screws, and the top access cover and disconnect-switch cover are also secured with tamper-proof screws. A thermostat and disconnect switch are built in. The baked enamel finish is meant to suit most interiors.
It mounts on a vertical wall with its length running horizontally and must sit at least 6 inches above the floor. It is not approved for hazardous or corrosive locations, or for any area that stores or uses gasoline, paint or other flammable liquids.
Installation Tips
Turn off power at the main panel before installing or wiring. Mount the rear panel to a vertical wall using anchors you supply through the 11/32 in. holes, with the heater at least 6 in. above the floor and not in a recess. Bring the supply wiring in through the 1-3/32 in. hole in the rear panel, using conductors sized to code with insulation rated at least 75°C, and connect the ground to the green pigtail lead. Hook the perforated cover over the top edge of the rear panel and fasten its bottom lip with the 1/4-20 x 1 in. tamper-proof screws; discard the standard cover screws it ships with. Confirm the supply voltage matches the nameplate before turning power on.
Ideal For
- Offices
- Conference Rooms
- Hallways
- Lobbies
- Waiting Rooms
- Other Common Areas
Ordering
| Availability | Backorder — call for an estimated ship date |
|---|---|
| Returns | See our return policy |
Why Buy From Carroll Parts?
- Helping Fix Things Since 1938Over 85 years of experience
- Same-Day ShippingIn-stock orders placed by 4 PM Central ship the same business day
- Repair Parts in One PlaceWe carry all available replacement parts for this model
- Real Experts800-654-3545 · Mon–Fri, 8 AM–5 PM Central
Frequently Asked Questions
How high off the floor does this heater need to be?
The installation instructions call for at least 6 inches between the bottom of the heater and the floor. Do not install it in a recess.
How do I keep it working well?
With power off, remove the front cover and vacuum dust from the finned element from time to time.
Where can I find replacement parts for the Marley J1258B?
Every part we carry for this model is on its repair parts page. Not sure which part you need? Call 800-654-3545.
What voltage is the Marley J1258B?
It’s a 208V single-phase unit. Make sure it matches the supply voltage where it will be installed — call us at 800-654-3545 if you’re not sure.
When will my order ship?
This unit is currently on backorder. Call us at 800-654-3545 for an estimated ship date.
What is your return policy?
Items must be new and unused. You can return them within 90 days. Please read our return policy before sending anything back. Questions about a return? Call 800-654-3545 or email [email protected], Mon–Fri, 8 AM–5 PM Central.
What Our Customers Say About Carroll Parts









Replacement Parts for the Marley J1258B
See all parts →Parts listed for this exact model.



