The TPI Fostoria FSP4348-3 is a compact 4.30 kW portable electric infrared heater built for spot warmth where workers need it most - tool tables, dock doors, paint cure stations, machine operator booths, and mid-size unheated work cells. Running on 480V three-phase power, the FSP4348-3 puts out clean directional radiant heat with no combustion, no fumes, and no oxygen draw, which is the only acceptable answer when fuel-fired heaters are off the table for safety, code, or contamination reasons.
Who buys this heater
The 4.30 kW class is the "personal warmth" spec in the TPI Fostoria portable infrared family - sized for one to two workers in a defined work area rather than whole-room heating. Auto-body and refinish shops use them for spot paint cure on smaller panels. Industrial maintenance teams set them up at machine operator stations during cold-weather shifts. General contractors run them on framing and finish stations during winter build. Print and sign shops use them for ink and toner cure cycles. Anywhere the answer is "keep the operator warm without heating the whole shop," this is the right size.
Top use cases
- Operator workstation warm-up - directed radiant heat at a press, machine, or assembly bench during cold-weather shifts.
- Paint cure on smaller panels and parts - clean radiant cure with no combustion contaminants on the finish.
- Sign-shop and print-shop ink cure - directional infrared accelerates UV-cure and solvent-flash on banners and graphics.
- Dock-door and shipping station warm-up - keeps loaders productive on cold mornings without heating the whole warehouse envelope.
- Construction trades cold-weather work - finish carpentry, taping, and detail work where workers need to stay productive in a cold shell.
Specifications
- Power: 4,300 watts (4.30 kW)
- Voltage: 480V three-phase
- Heating elements: medium-wave quartz infrared lamps
- Reflectors: polished aluminum directional
- Mounting: portable wheeled cart with adjustable tilt
- Frame: powder-coated steel
- Cord: factory-installed power cord (the "-3" suffix indicates the corded version)
Frequently asked questions
How is 4.30 kW different from the 13.5 kW unit?
4.30 kW is the "single-worker spot heat" spec - it warms an operator at a workstation comfortably without heating an entire room. 13.5 kW (the FSP-9548-3 in the same Fostoria family) is the larger spec for full work cells, garage bays, and concrete-cure work. Choose 4.30 kW for personal-warmth applications and step up if you need to warm a whole bay.
What is the breaker requirement?
4.30 kW at 480V three-phase draws roughly 5-6 amps per leg. Confirm circuit availability with a licensed electrician before plug-in - 480V outlets are common in industrial facilities but rare in commercial or residential spaces.
Why infrared instead of forced-air electric?
Infrared warms objects directly: workers, tools, parts, and surfaces feel warm within seconds because the infrared energy is absorbed by the surface, not lost in heating ambient air. Forced-air electric heaters work too, but in unsealed spaces (open garage doors, large warehouses, construction shells) the warm air rises and escapes. Radiant infrared is the right tool when conditioning the air is impractical.
Lamp life and replacement?
Medium-wave quartz lamps are rated for several thousand hours and are field-replaceable. Replacement lamps are stocked through TPI distribution. Keep reflectors clean - dust on aluminum reflectors reduces directed output.
Indoor versus outdoor use?
This is an indoor portable heater. The unit is not weather-sealed for direct rain or snow exposure. For outdoor or open-air construction, use under cover or in a sheltered work cell.
Can I leave the FSP4348-3 running unattended during a paint cure cycle?
Best practice is to keep a worker in the area whenever the heater is energized. The portable cart design, 480V three-phase service, and high-output infrared lamps make this an industrial-supervised heater, not an unattended cure oven. Set a kitchen-style timer or use a contactor with a programmable timer on the supply circuit if the cure cycle runs longer than the operator's shift. Keep combustible materials, drop cloths, and paint solvents well clear of the reflector face during operation - radiant heat does its job on whatever is in front of the unit, intended or not.
Discount Cleaning Products is an authorized TPI Corporation dealer for the Fostoria portable infrared line. We stock and ship the FSP4348-3 direct from TPI distribution with full factory warranty and access to OEM lamps and replacement parts.
