Key Takeaways
- Space heaters cause most heating fire deaths. NFPA found that space heaters and heating stoves were behind 29% of home heating equipment fires but 77% of the deaths in 2019 to 2023.
- Give tenants the rules in writing: 3 feet of clearance, plug straight into a wall outlet, off when leaving or sleeping, tip-over shutoff, a testing lab label, and never an oven or fuel-burning heater for heat.
- Older Cincinnati wiring sets the limit. One 1,500-watt heater draws 12.5 amps, most of a 15-amp circuit. One heater per circuit, and a warm outlet means stop.
- A tenant who runs a space heater every day is telling you something. The heating system is probably short on heat, and that is a repair, not a lifestyle.
Cincinnati landlords should give every tenant a short, written set of space heater rules before the first cold snap, because space heaters are the most dangerous piece of heating equipment in a home. The rules are simple: keep anything that can burn 3 feet away, plug the heater straight into a wall outlet, turn it off when leaving the room or going to sleep, buy one with a tip-over shutoff and a testing lab label, and never heat with an oven, stove, grill, or fuel-burning heater. Below are the fire numbers, a list you can copy into a tenant letter, what older Cincinnati wiring can handle, what a lease can and can’t do, and when a space heater is a sign the furnace or boiler needs work.
How Big the Space Heater Fire Risk Is
The National Fire Protection Association’s home heating fires report covers 2019 to 2023. In those years, U.S. fire departments responded to an estimated annual average of 38,881 home fires involving heating equipment. Those fires caused an estimated 432 civilian deaths, 1,352 civilian injuries, and $1.1 billion in direct property damage each year.
Space heaters stand out in that report. Space heaters and heating stoves accounted for 29% of the heating equipment fires, but 77% of the deaths and 71% of the injuries. A furnace fire usually starts in a basement with a metal cabinet around it. A space heater sits a few feet from a bed, a couch, or a pile of laundry.
The U.S. Consumer Product Safety Commission puts it in smaller numbers. In a January 2026 winter safety release, CPSC estimated that portable heaters, including electric space heaters, are involved in an average of 1,600 fires per year, with an average of 70 deaths and 150 injuries a year from 2020 to 2022.
Here is our view: a space heater in a rental should be a stopgap, never the heating plan. When 29% of heating fires cause 77% of heating fire deaths, the job is to get the real heating system working and the space heater back in the closet.
Space Heater Safety Rules to Hand Cincinnati Tenants
Copy this list into a move-in packet or a fall letter. Keep it short so it gets read.
1. Keep 3 Feet of Clear Space Around It
Nothing that can burn within 3 feet of the front, sides, or back: curtains, bedding, sofas, clothes, paper, and boxes. CPSC’s space heater guidance uses the same 3-foot distance. Set the heater on a hard, level floor, not on a rug, a chair, or a table. Keep kids and pets out of that 3-foot zone too.
2. Plug It Straight into a Wall Outlet
Never into an extension cord or a power strip. A space heater draws more current than most cords and strips are built to carry for hours at a time, and that is how they melt. Don’t plug anything else into the same outlet while the heater runs.
3. Turn It Off When You Leave or Go to Sleep
A space heater only runs when someone is awake and in the room. Turn it off before bed, before leaving the apartment, and before leaving the room for more than a few minutes. Use an extra blanket overnight instead.
4. Use a Heater with Tip-Over and Overheat Shutoff
Buy an electric heater that shuts itself off if it gets knocked over or runs too hot. Many newer models have both. If yours doesn’t, replace it.
5. Look for a UL or ETL Label
The label means a nationally recognized testing lab checked the design. Skip heaters with no label, and skip anything with a cracked case, a damaged cord, or a plug that looks scorched.
6. Never Heat with an Oven, Stove, Grill, or Fuel-Burning Heater
Gas ovens and stovetops are not built to heat a room, and running them for hours can fill an apartment with carbon monoxide. Kerosene and propane heaters, charcoal grills, and generators don’t belong indoors either. Use electric heaters only, unless the landlord has installed a vented gas heater.
7. Keep the Smoke and CO Alarms Working
Don’t pull batteries or cover alarms. Tell the landlord right away if one chirps, is missing, or goes off. If the CO alarm sounds, get everyone out and call 911 from outside.
8. Tell Your Landlord If You Need a Heater to Stay Warm
If a room won’t get warm without a space heater, report it. That is a heating problem your landlord needs to fix, not something to work around all winter.
Older Cincinnati Wiring and Space Heaters
Most plug-in space heaters top out at 1,500 watts. On a 120-volt circuit, that is 12.5 amps. A typical bedroom or living room circuit in an older house is 15 amps, and it often feeds several rooms’ outlets and lights. One heater on high uses most of that circuit by itself. Add a second heater, a hair dryer, or a window air conditioner left plugged in, and the breaker trips, or in a house with old fuses, someone puts in a bigger fuse and the wire overheats.
That matters in Cincinnati, where plenty of rentals are older two-families and converted houses in neighborhoods like Clifton, Northside, and Walnut Hills. Some still have original wiring, ungrounded two-prong outlets, or fuse panels. Give tenants two rules that fit any building:
One heater per circuit. If you don’t know which outlets share a circuit, label the panel at turnover and tell tenants which rooms are on separate breakers.
A warm outlet means stop. CPSC advises checking often during use whether the heater plug, cord, wall outlet, or faceplate is hot. A warm or discolored outlet, a burning smell, or lights that dim when the heater kicks on usually means a loose connection or worn outlet. The tenant should unplug the heater and call you, and you should call a licensed electrician.
If breakers trip every winter or the panel still has fuses, have the panel and wiring looked at before tenants start plugging in heaters. Our electrical inspection service covers panels, circuits, and outlets in older rentals.
Can Cincinnati Landlords Ban Space Heaters in a Lease?
We are heating contractors, not lawyers, so confirm this with your attorney before you change your lease. In general, a lease can set reasonable rules on what appliances tenants use, and many landlords restrict or ban portable heaters, especially fuel-burning ones. A ban on kerosene and propane heaters is common and easy to defend on safety grounds.
A full ban on electric heaters is harder to live with. Ohio Revised Code 5321.04 still requires you to supply reasonable heat and keep the heating system you provide in good and safe working order. A lease clause doesn’t change that. If the heat is inadequate, a tenant with a banned heater and a cold apartment is a code complaint waiting to happen. Many landlords land in the middle: electric heaters allowed if they follow the written rules, fuel-burning heaters banned, and any heater use reported if the heat isn’t keeping up.
When Cincinnati Landlords Supply Space Heaters During a No-Heat Repair
In Cincinnati units where tenants don’t control their own heat, such as buildings on a shared boiler or central system, the inside must be 70 degrees or warmer once the outdoor temperature stays below 60 degrees for 24 consecutive hours. The city can fine you $300 for the first day without adequate heat and $750 for each day after.
While the heat is being restored, the Health Department allows landlords to provide space heaters that keep the living space at 70 degrees or more, or temporary housing if heaters can’t do it. Our landlord guide for when a tenant has no heat covers that response step by step.
If you hand over heaters, hand over the rules with them. Buy electric heaters with tip-over and overheat shutoff and a UL or ETL label, deliver one per circuit, and check that the unit has working smoke and carbon monoxide alarms. Our post on carbon monoxide detectors in Ohio rentals covers which units need them and where they go. Keep the receipts and note when the heaters went in and came out, along with your repair records.
Frequent Space Heater Use Means the Heating System Needs Work
A space heater on a cold January night is normal. A space heater running every day in the same room is a symptom. The usual causes:
A furnace that can’t keep up, because of a clogged filter, a dirty burner, a failing blower, or a unit that is simply worn out after 15 to 20 years.
Airflow problems: closed or blocked vents, crushed or disconnected ductwork, or a room at the far end of a long duct run.
Boiler and radiator problems in older buildings: radiators that need bleeding, steam vents that stick, or a boiler pressure problem.
A building problem: drafty windows, missing insulation, or an addition that was never tied into the heating system.
Ask tenants to tell you which rooms need a heater and how often. That one question finds problems before they turn into a no-heat call. A fall tune-up catches many of them, and our pre-winter HVAC checklist for rental properties lists what to check. For a system that is already falling short, our furnace repair service finds the cause.
When You Don’t Need a Technician
Most space heater questions don’t need us. Writing the tenant rules, buying a safer heater, labeling the panel, and testing smoke and CO alarms are landlord jobs. A heater that trips a breaker once because it shared a circuit with a microwave just needs a different outlet.
If a tenant uses a heater for an hour in a cold bedroom on the worst nights of the year and the rest of the unit holds temperature, that is normal and nothing needs fixing. Call a technician when a room never gets warm without a heater, when the whole unit runs cold, when an outlet gets warm or discolored, or when breakers trip every time a heater runs.
Get Your Cincinnati Rental Heating Checked
Degree of Comfort services rental homes and multi-unit buildings across Cincinnati and the surrounding Tri-State, including Northern Kentucky and Southeast Indiana. We repair and maintain furnaces and boilers, inspect electrical panels and circuits, and find out why a tenant needs a space heater in the first place. We are family-owned, licensed and insured, with upfront, flat-rate pricing.
Call (513) 586-5107 or request an estimate for your properties.
Frequently Asked Questions
Let Degree of Comfort Handle It
Our licensed technicians serve Cincinnati and surrounding areas. Same-day service available.
Call (513) 586-5107
