The best heater depends on your space and needs. For whole-house heating, heat pumps are the most energy-efficient. For supplementing a single room, ceramic heaters are excellent for fast, localized warmth, while oil-filled radiators provide the best long-lasting, silent heat.
All electric space heaters convert 100% of the electricity they draw into heat, meaning "efficiency" comes down to targeted heat delivery and smart controls. For zone heating, Infrared and Oil-Filled radiators are the most efficient, while PTC Ceramic heaters are the best for quickly heating a localized space.
The best room heater depends on your space and heating needs. The Dreo Solaris Slim H3 is the best overall for fast, quiet heating. For energy efficiency, the Envi Smart Wall Heater is top-tier. If you want budget-friendly performance, the Amazon Basics Ceramic Heater is ideal.
Most indoor heaters tend to dry out the air, lowering indoor humidity levels. Dry air can cause irritation to the respiratory tract, leading to symptoms like dry throat, cough, and nasal congestion. For individuals with chronic respiratory diseases like asthma or COPD, low humidity can exacerbate symptoms.
Infrared heaters provide direct, targeted warmth to people and objects using radiant heat (similar to sunlight), making them highly efficient for drafty spaces or personal use. Ceramic heaters use convection, heating the air and circulating it around the room with a fan, which is better for warming an entire enclosed space.
Infrared heaters directly warm objects and people in a "line-of-sight" manner. While highly efficient for targeted heating, their main drawbacks include a lack of retained warmth once turned off, vulnerability to blocking by furniture, and ineffective heating in uninsulated spaces.
How Much Does It Cost to Run a 1500W Infrared Heater? (Real Examples & Calculations) A 1500W infrared heater costs between $0.18 and $0.24 per hour to run in the U.S., depending on your electricity rate. That equals roughly $1.80–$2.40 per day (if used 10 hours), about $55–$72 per month, or $650–$870 per year.
The safest space heaters on the market are oil-filled radiators and modern ceramic heaters. These types feature built-in safety mechanisms like tip-over shutoff and overheat protection to significantly reduce fire risks.
For individuals with COPD, temperatures below freezing (32°F / 0°C) are considered too cold and can trigger severe flare-ups, chest tightness, and shortness of breath. Even temperatures dropping below 40°F (4.4°C) can cause the dry, chilled air to irritate overly sensitive airways.
It takes time for your home to warm up and cool down. If you're not sure how long it takes, try turning the heating on about 30 minutes before you need it. You should turn it off 30 minutes before you'll stop needing it.
The best heater for a bedroom is the Dreo Solaris Slim H3 Space Heater or the Lasko 1500W Ceramic Tower Heater. Both are safe, quiet, compact, and feature built-in thermostats and tip-over auto-shutoff, making them ideal and budget-friendly for small-to-medium bedrooms.
A 1500-watt heater typically heats a room up to 150 square feet (as a primary heat source) or up to 250 square feet (if used as supplementary heat alongside a central system). This capacity is ideal for small to medium-sized bedrooms, home offices, or dorms.
Cheapest ways to heat your home
For the lowest electricity consumption, choose low-wattage heaters (200W to 500W) or models with built-in ECO modes and thermostats. Standard space heaters pull 1500W, but low-wattage units reduce energy use by targeting only your immediate personal space instead of the whole room.
6 Important Things to Consider Before Buying a Room Heater
Convection Heaters
They produce hot air that rises to the ceiling and pushes cooler air to the floor, causing circulation of air in the room. These heaters are either baseboard heaters or water- or oil-filled heaters. Water- and oil-filled heaters are by far the most efficient, and they are generally warm to the touch.
Cigarette smoking is the major cause of lung cancer and chronic obstructive pulmonary disease (COPD), which includes chronic bronchitis and emphysema. Cigarette smoke can narrow the air passages and make breathing more difficult.
Indoor Risks: Heaters can circulate dust and dry out the air, worsening symptoms. Viral Load: Flu and pneumonia viruses, which thrive in winter, are leading causes of COPD flare-ups.
For generally healthy individuals, sleeping in a cold room is not bad for your lungs, as your body naturally warms and humidifies air as you breathe. However, if your room is too cold and dry, it can dry out your airways. This may irritate the throat, lead to coughing, and trigger discomfort.
Portable propane heaters are one of the most effective ways to provide heat during a power outage. Many models are designed for indoor use and equipped with safety features like oxygen depletion sensors and tip-over switches.
Consumer Reports tests space heaters primarily on room heating ability, spot heating, and strict fire and safety criteria, such as overheat protection and tipping tests. Highly rated models often cost around $75 to $100 and feature auto-climate control and tip-over shut-offs.
Common Causes of Heating Issues
Air filters play a crucial role in maintaining your heater's efficiency. Over time, they collect dust and debris, which can restrict airflow and cause your heater to overheat or underperform. Regularly replacing filters is essential for smooth operation.
In most homes, Heating and Cooling (HVAC) systems drive the highest energy costs, accounting for nearly 40% to 50% of your total electricity bill. Following these, the appliances that run up your bill the most include water heaters, refrigerators, and laundry machines.
Generally, a 1500-watt heater can effectively heat a well-insulated room of about 150 square feet (approximately 14 square meters) in moderate climates. For larger spaces or colder climates, additional heating sources or a higher wattage heater may be necessary.
If your home uses electricity for central heating, the cost is likely still cheaper than running space heaters. According to Scerbo, “Buying a space heater for every room would increase the electricity bill more than if you had just bumped up the thermostat.”