A space heater hire means one of four machines: an electric fan heater for a small enclosed room, a direct fired propane or kerosene unit for open ventilated space, an indirect fired heater that keeps combustion products outside, and a flameless diesel unit for occupied or sensitive work. Fuel and ventilation pick the type before capacity does.
Direct fired, indirect fired and flameless
A direct fired heater burns fuel in the airstream, which is efficient and puts moisture and combustion gases into the room, so it needs genuine ventilation. An indirect fired unit uses a heat exchanger and a flue, leaving the delivered air clean. Flameless diesel heaters produce no open flame and suit occupied or fuel sensitive areas.
Sizing by BTU, then by how often the doors open
Heaters are quoted in BTU per hour, from around 30,000 for a small electric or propane unit to 400,000 and beyond on a towable indirect. Volume, insulation and door traffic all matter. Give the counter the cubic feet and a target temperature and let them size it rather than picking a number yourself.
The power or the fuel it will want from you
Electric heaters above a few kilowatts want a dedicated circuit or a generator, and a 240 volt unit needs the correct receptacle on site. Propane heaters run through a regulator from a cylinder you supply or hire separately. Diesel units carry a tank rated in hours, so ask the run time at full output.
Ventilation is a condition of the hire, not advice
Any fuel burning heater in an enclosed space consumes oxygen and produces carbon monoxide, and the counter will say so when you sign. Fresh air openings, a carbon monoxide monitor and never running a direct fired unit in a sealed room are the basic conditions. Where a space cannot be ventilated, hire electric or flameless.
Questions people ask about space heater rental
What size heater do I need to dry out a room?
Drying is about air movement and moisture removal as much as heat, so the usual hire is a heater paired with a dehumidifier or air mover rather than a bigger heater alone. Tell the yard the room volume and how wet it is, and take the pairing they suggest.
Can I leave a propane heater running indoors overnight?
Not a direct fired one, and no unattended heater in an occupied space. Where heat is needed overnight, the answer is an indirect fired unit flued to the outside or a flameless machine, with a carbon monoxide monitor in the space. Say the words unattended and overnight at the counter so the right machine is issued.
What does a construction heater cost to rent?
Common propane and electric units land near $50 to $120 a day, with weekly rates well below seven times that. Towable indirect fired heaters are a tier up and are quoted with delivery, since they arrive on a trailer. Fuel is yours in every case and is often the larger number over a week.