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Internet # 313154909

Model # 98578895M

300-Watt Black Ceramic Mini Portable Heater

$29.10
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  • Internal heat-limiting thermostat for keeping localized area warm
  • Quiet operation minimizes distractions
  • Overheat protection for safety and reliability
  • View More Details

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Product Details

About This Product

When temperatures drop, prevent your heating bill from going up. The Optimus Portable Mini Heater is an economical and efficient means to provide warmth. This energy-efficient heater quietly radiates heat to keep a localized area warm, keeping you cozy on a chilly day.

Highlights

Product Information

Internet # 313154909

Model # 98578895M

Additional Resources

Shop All Optimus

Specifications

Dimensions: H 7 in, W 5 in, D 6 in

Dimensions

Cord Length (in.)

6 in

Product Depth (in.)

6 in

Product Height (in.)

7 in

Product Width (in.)

5 in

Details

Amperage (A)

2.5 A

Area Heated (sq. ft.)

100 sq ft

Color

BLACK

Color Family

Blue

Control Type

Mechanical

Fan Mode

Fan Mode

Features

ACLI Safety Plug, Nonslip Base

Heat rating (BTU/hour)

4710 Btu/h

Heater Type

Other

Heating Method

Radiant

Indoor/Outdoor

Indoor

Location Use

Living Space

Number of Heat Settings

1

Pack Size

1

Portable Heater Features

Portable, Thermostat

Power/Fuel Type

Electric

Returnable

90-Day

Room Size

Small

Thermostat Settings

Adjustable

Voltage (V)

120 V

Wattage (W)

300 W

Warranty / Certifications

Certifications and Listings

ETL Listed

Manufacturer Warranty

OPTIMUS LIMITED ONE YEAR WARRANTY

Questions & Answers

The specifications say the Thermostat is Adjustable. So if it is internally adjusted to kick on at a certain temperature, how do I adjust it to a lower temperature, like 50 degrees?
ByNov 10, 2025
1 Answer | 
Answer This Question

You only have the option to turn the heater on and off. The thermostat is internal and is not manually adjustable.

By|Nov 11, 2025
    0/0


    I need to keep an 8x8 storage shed that contains a fresh water tank from freezing. Can the thermostat be adjusted to kick on when the temperature gets below 50 degrees?
    ByNov 4, 2025
    1 Answer | 
    Answer This Question

    The unit has an internal thermostat. The heater will turn on and off according to the setting it's put on.

    By|Nov 10, 2025
      0/0


      The ones I bought in 2023 still had tip switches. they are not listed in 2024. An internal heat limiting switch will shut down after your house is on fire. did you do away with tip switches.
      ByOct 21, 2024
      1 Answer | 
      Answer This Question

      Dear Valued Home Depot Customer, We have reached out to the manufacturer and their "answer" is, The tip switch is still there.

      By|Nov 6, 2024
        0/0


        Is it battery operated?
        BySep 8, 2024
        1 Answer | 
        Answer This Question

        This heater has a power cord. It is not battery operated.

        By|Sep 13, 2024
          0/0


          Is it safe to use around dogs and cats if they were to get too close to it?
          ByJan 14, 2024
          2 Answers | 
          Answer This Question

          A cat can knock one over and then turn it on. One of my cats would turn on my compressor so I would come out and play. One of my cats tried to fax his butt to Russia but couldn't get the number right. He really hated Putin.

          By|Dec 12, 2024
            0/0

            The unit has a tip over safety feature, it will automatically shut off if it's tipped over but you should use caution with fur and hair.

            By|May 12, 2024
              0/0

              (1)

              Wanting it for the sleeper bunk of a semi. Can this be plugged into an inverter ?
              ByDec 15, 2023
              1 Answer | 
              Answer This Question

              Yes, should work on an inverter.

              By|Dec 16, 2023
                0/0


                What does it run on
                ByNov 25, 2023
                1 Answer | 
                Answer This Question

                Thank you for your interest in this item. It has a power cord, it's an electric heater.

                By|May 12, 2024
                  0/0

                  (1)

                  is the optimus 300 ceramic heater a 12 volt.electric supplied heater to run on a 12volt automobile battery??Kenneth
                  ByOct 8, 2023
                  1 Answer | 
                  Answer This Question

                  I'm not sure about how that works. The Volts are not provided by the manufacturer.

                  By|Nov 11, 2023
                    0/0


                    Viewing 1-8 of 14

                    Customer Reviews

                    3.9 out of 5

                    • 3.9 out of 22 reviews
                    • 60% recommend this product
                    Filter by:
                    Showing 1-10 of 22 reviews
                    While this heater is good for what it is, having no thermostat to set and or adjust was a mild let down.
                    by
                    • Verified Purchase
                    This customer chose to rate the product and not provide text.
                    by
                    • Verified Purchase
                    This customer chose to rate the product and not provide text.
                    by
                    • Verified Purchase
                    quit after 15 minutes of running. I returned it
                    by
                    • Verified Purchase
                    This Max 300 heater will not heat a 5x7 space. If the room is already warm it will add a little extra warmth to a chilly corner, but that's it. Not worth $30.
                    by
                    • Verified Purchase
                    This customer chose to rate the product and not provide text.
                    by
                    • Verified Purchase
                    Needed heat in my bathroom when taking a shower this...
                    Needed heat in my bathroom when taking a shower this does the trick. I put it on and by the time im ready to get out its warmed the room to a good temp so im not cold . I recomend this.
                    by
                      1 found this review helpful
                      A Good Value
                      Obviously, a low wattage heater but puts out quite a bit of heat for it's size.
                      by
                      • Verified Purchase
                      • Recommended
                      1 found this review helpful
                      A waste of time and money
                      Not only did it NOT meet my expectations, it didn’t work.
                      by
                      • Verified Purchase
                      This customer chose to rate the product and not provide text.
                      by
                        Showing 1-10 of 22 reviews

                        Compare Key Features

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                        Product Snapshot

                        Ideal for small spaces, this 300W portable heater offers adjustable thermostat and overheat protection for cozy warmth.
                        Ideal for small spaces, this portable heater offers adjustable thermostat and overheat protection for customized comfort.
                        Ideal for small spaces, this 750W heater offers adjustable thermostat and tip-over safety switch for personalized comfort and peace of mind.
                        Ideal for small spaces, this 1500W heater offers fast heating with 3 modes and essential safety features for worry-free warmth.

                        Heating Capacity

                        100 sq ft
                        100 sq ft
                        50 sq ft
                        100 sq ft

                        Adjustable Thermostat

                        Safety Features

                        Oscillation

                        Remote Control