20 Best Heavy Duty Extension Cord For Space Heater [2024]

Are you looking for the best Heavy Duty Extension Cord For Space Heater? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Heavy Duty Extension Cord For Space Heater.

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1 Heavy Duty Extension Cord Wire, (12 FT) Ideal for Air Conditioner and Major Appliance Heavy Duty Extension Cord Wire, (12 FT) Ideal for Air Conditioner and Major Appliance
2 10 Ft Black Oil Resistant Extension Cord for Farms and Ranches - 12/3 SJTOW Heavy Duty Outdoor Cable... 10 Ft Black Oil Resistant Extension Cord for Farms and Ranches - 12/3 SJTOW Heavy Duty Outdoor...
3 FIRMERST 6 Feet 1875W 15A Low Profile Flat Plug Extension Cord 14 AWG Black UL Listed FIRMERST 6 Feet 1875W 15A Low Profile Flat Plug Extension Cord 14 AWG Black UL Listed
4 Heavy Duty Three Prong Extension Cord for Kitchen Appliances - Refrigerator, Air Conditioner,... Heavy Duty Three Prong Extension Cord for Kitchen Appliances - Refrigerator, Air Conditioner,...
5 FIRMERST 14 AWG Extension Cord 1875W 15A Heavy Duty Grounded 6 Feet, Pack of 2, White FIRMERST 14 AWG Extension Cord 1875W 15A Heavy Duty Grounded 6 Feet, Pack of 2, White
6 Tripp Lite P024-003 Heavy-Duty Power Extension Cord 15A, 14AWG (NEMA 5-15P to NEMA 5-15R) 3-Ft Black Tripp Lite P024-003 Heavy-Duty Power Extension Cord 15A, 14AWG (NEMA 5-15P to NEMA 5-15R) 3-Ft Black
7 GoGreen Power (GG-25612) 14/3 12' SPT Appliance Cord, Beige, 12 Ft GoGreen Power (GG-25612) 14/3 12' SPT Appliance Cord, Beige, 12 Ft
8 Heavy Duty Air Conditioner and Major Appliance Extension Cord Wire, (9 FT) Heavy Duty Air Conditioner and Major Appliance Extension Cord Wire, (9 FT)
9 Heavy Duty Extension Cord 15 Ft Wire Gray for Air Conditioner Refrigerator and Major Appliances... Heavy Duty Extension Cord 15 Ft Wire Gray for Air Conditioner Refrigerator and Major Appliances...
10 FIRMERST 10 Feet 1875W Extension Cord Heavy Duty Low Profile White 15A UL Listed FIRMERST 10 Feet 1875W Extension Cord Heavy Duty Low Profile White 15A UL Listed
11 Aurum Cables 6ft Heavy Duty Power Extension Cord, 16 Gauge 3 Prong 125 Volts, 13 Amp, SJTW NEMA... Aurum Cables 6ft Heavy Duty Power Extension Cord, 16 Gauge 3 Prong 125 Volts, 13 Amp, SJTW NEMA...
12 Heavy Duty Extension Cord Wire, (3 FT) Ideal for Air Conditioner and Major Appliance Heavy Duty Extension Cord Wire, (3 FT) Ideal for Air Conditioner and Major Appliance
13 Heavy Duty Extension Cord Wire, (6 FT) Ideal for Air Conditioner and Major Appliance Heavy Duty Extension Cord Wire, (6 FT) Ideal for Air Conditioner and Major Appliance
14 Uninex EC1412AUL Air Conditioner and Major Appliance Extension Cord, Heavy Duty, Grounded, 14/3 AWG,... Uninex EC1412AUL Air Conditioner and Major Appliance Extension Cord, Heavy Duty, Grounded, 14/3...
15 UltraPro 25 Ft Extension Cord, 3-Outlet Power Strip, Double Insulated, Grounded, Heavy Duty, 16... UltraPro 25 Ft Extension Cord, 3-Outlet Power Strip, Double Insulated, Grounded, Heavy Duty, 16...
16 Bergen Industries Inc PS915143 3-Wire Appliance and Power Tool Cord, 9 ft, 14 AWG, 15A/125V AC,... Bergen Industries Inc PS915143 3-Wire Appliance and Power Tool Cord, 9 ft, 14 AWG, 15A/125V AC,...
17 ECHOGEAR On-Wall Surge Protector with 6 Pivoting AC Outlets & 1080 Joules of Surge Protection - Low... ECHOGEAR On-Wall Surge Protector with 6 Pivoting AC Outlets & 1080 Joules of Surge Protection -...
18 Clear Power 6 ft 14/3 Gray Air Conditioner/Major Appliance Indoor Extension Cord, Grounded Flat... Clear Power 6 ft 14/3 Gray Air Conditioner/Major Appliance Indoor Extension Cord, Grounded Flat...
19 POWTECH Heavy duty 6 FT Air Conditioner and Major Appliance Extension Cord UL Listed 14 Gauge, 125V,... POWTECH Heavy duty 6 FT Air Conditioner and Major Appliance Extension Cord UL Listed 14 Gauge,...
20 UltraPro Gray Heavy Duty 5-Outlet Extender, Outdoor Extension Cord Adapter, Resettable Circuit... UltraPro Gray Heavy Duty 5-Outlet Extender, Outdoor Extension Cord Adapter, Resettable Circuit...
Bestseller No. 1
Heavy Duty Extension Cord Wire, (12 FT) Ideal for Air Conditioner and Major Appliance
  • Angle Plug Allows cord to remain flush to wall in tight spaces
  • Sturdy cord Ideal for plugging in large appliances such as washers, dryers, or refrigerators, power tools and other major appliances
  • Grip grooves allow easy connection and disconnection of cord
  • 1875 Watts -15 Amps/14 Gauge/3 Conductor wire - SPT-3/125 Volt. ETL Listed
  • Heavy Duty vinyl Insulation, Color of cord may vary
Bestseller No. 2
10 Ft Black Oil Resistant Extension Cord for Farms and Ranches - 12/3 SJTOW Heavy Duty Outdoor Cable...
  • DESIGNED FOR RUGGED USE - Water, oil, and flame resistant. Flexible in cold temperatures.
  • HEAVY DUTY STRAIN RELIEF for optimal performance. 3 prong grounded plug for added safety.
  • REINFORCED BLADES protect prongs from bending or breaking. Oil resistant for farm and industrial use.
  • MEETS OSHA REQUIREMENTS and is UL Listed. 3 wire extension cord, 10 foot, 15 amp, 125 volt, 1875 watt.
  • LIFETIME REPLACEMENT WARRANTY - Iron Forge Cable stands behind all of its extension cords 100%. Register online for a free lifetime warranty.
SaleBestseller No. 3
FIRMERST 6 Feet 1875W 15A Low Profile Flat Plug Extension Cord 14 AWG Black UL Listed
  • 3x14 AWG,15Amp 125Volt ,1875 Watts ,UL&CUL Listed ,6 Feet Black.
  • HEAVY DUTY, STURDY BUT FLEXIBLE: 14 AWG (15A) extension cords with thicker wire diameters, which can handle more amperage and thus more wattage, less...
  • SPACE EFFICIENT: Convert your standard AC power cord to a slim flat plug, providing angular flexibility. Plug into the top outlet and still have usage...
  • FLAT PLUG: Designed for tight spaces like behind furniture, bookshelves, desks or anything which is close to the wall not allowing you to use the...
  • UL CERTIFIED: Cord 3 X14AWG Rating 125V / 15A.One pcs in bag and created with the guarantee of quality and lifetime satisfaction.
Bestseller No. 4
Heavy Duty Three Prong Extension Cord for Kitchen Appliances - Refrigerator, Air Conditioner,...
  • 12 FOOT EXTENSION CORD - 15A / 125V, 14/3 SPT 3ft. appliance extension cord for indoor appliances and outdoor use. Perfect for every household with...
  • HEAVY DUTY CABLE - the insulation is made of high quality vinyl so it can protect the extension cord from sunlight, moisture, or abrasions. This...
  • SPACE SAVING AND ERGONOMIC - The plug features a right angle design that is slim and parallel to the wall when plugged in making it flat and...
  • PERFECT FOR BIG APPLIANCES - This Nick the Fixer extension cord is made for major appliances like refrigerators, ovens, toasters, microwaves, air...
  • 100% MONEY BACK GUARANTEE - Nick the Fixer strives for 100% customer satisfaction. In case there are any problems with your order, or you are not...
Bestseller No. 5
FIRMERST 14 AWG Extension Cord 1875W 15A Heavy Duty Grounded 6 Feet, Pack of 2, White
  • 【UL CERTIFIED & Safety】2 Pack of 6 Feet White extension cord, 3x14 AWG, 15 Amp 125 Volt, 1875 Watt, 125 Volt, UL&CUL Listed
  • 【HEAVY DUTY】14 AWG cords, with thicker wire diameter, are capable of handling more power(1875W) with less resistance compared with the thinner 16...
  • 【FLEXIBLE & EASY TO BEND】Even if the cord is more thick than 16 AWG, it's still soft, flexible and easy to fold. It allows for coiling or...
  • 【WIDELY USE】Ideal for household appliances, microwave, phone charger, light, toaster, laptop, hair dryer, etc
  • 【WARNING】Indoor use only / Not waterproof / Check the wattage and ampere limit before use
SaleBestseller No. 6
Tripp Lite P024-003 Heavy-Duty Power Extension Cord 15A, 14AWG (NEMA 5-15P to NEMA 5-15R) 3-Ft Black
  • Heavy duty power extension cord: Ideal for extending power connections of larger servers, PDUs, PCs, monitors, laser printers, household appliances...
  • High quality connections: NEMA 5 15R to NEMA 5 15P connectors
  • 3 feet heavy duty extension cord: Allows you to extend the length of your existing power cord an additional 3 feet constructed of 14AWG wire, the...
  • Superior construction: Manufactured in compliance with strict RoHS specifications. UL listed. Wire Gauge (OD mm²): 2.08
  • Lifetime warranty: For peace of mind, the P024 003 comes with a lifetime limited warranty
Bestseller No. 7
GoGreen Power (GG-25612) 14/3 12' SPT Appliance Cord, Beige, 12 Ft
  • Appliance Cord: The GoGreen Power 14/3 12' Appliance cords are the ideal, heavy duty cords for large appliances at home, such as washing machines,...
  • Grounded Plug: The grounded, 3 prong, right-angle male plug guards against accidental disconnection so that your appliances are not only securely...
  • Heavy Duty Power Extension: Suited for virtually any indoor appliance use, including air-conditioners, appliances, and fans, with a maximum of 15...
  • 14/3 Appliance Cord: Approved for indoor power, this 14 gauge heavy duty wire comes with a flexible vinyl jacket that provides protection of the cord...
  • Size and Other Details: This 14/3 SPT-3 cable is cETL listed and meets all industry standards. Go Green and follow the instructions located on the...
Bestseller No. 8
Heavy Duty Air Conditioner and Major Appliance Extension Cord Wire, (9 FT)
  • Angle Plug Allows cord to remain flush to wall in tight spaces
  • Sturdy cord Ideal for plugging in large appliances such as washers, dryers, or refrigerators, power tools and other major appliances
  • Grip grooves allow easy connection and disconnection of cord
  • 1875 Watts -15 Amps/14 Gauge/3 Conductor wire - SPT-3/125 Volt. ETL Listed
  • Heavy Duty vinyl Insulation, Color of cord may vary
Bestseller No. 9
Heavy Duty Extension Cord 15 Ft Wire Gray for Air Conditioner Refrigerator and Major Appliances...
  • Duty vinyl Insulation The cord suitable for both indoor and outdoor use
  • Angle Plug Allows cord to remain flush to wall in tight spaces Extension cords are perfect for heavy duty
  • Ideal for plugging in large appliances such as washers, dryers, or refrigerators, power tools and other major appliances, Can also be used for drills,...
  • Grip grooves allow easy connection and disconnection of cord
  • 1875 Watts -15 Amps/14 Gauge/3 Conductor wire - SPT-3/125 Volt. UL Listed
Bestseller No. 10
FIRMERST 10 Feet 1875W Extension Cord Heavy Duty Low Profile White 15A UL Listed
  • 3x14 AWG,15Amp 125Volt ,1875 Watts ,UL&CUL Listed ,10 Feet White.
  • HEAVY DUTY, STURDY BUT FLEXIBLE: 14 AWG (15A) extension cords with thicker wire diameters, which can handle more amperage and thus more wattage, less...
  • SPACE EFFICIENT: Convert your standard AC power cord to a slim flat plug, providing angular flexibility. Plug into the top outlet and still have usage...
  • FLAT PLUG: Designed for tight spaces like behind furniture, bookshelves, desks or anything which is close to the wall not allowing you to use the...
  • UL CERTIFIED: Cord 3x14AWG Rating 125V / 15A.One pcs of 10 feet white cord in bag and created with the guarantee of quality and lifetime satisfaction.
Bestseller No. 11
Aurum Cables 6ft Heavy Duty Power Extension Cord, 16 Gauge 3 Prong 125 Volts, 13 Amp, SJTW NEMA...
  • SPACE SOLUTION: Maximize the usage of you power strips electrical cords power outlets cables and wall outlets with this extension cable by allowing...
  • COMPATIBLE WITH: The standard three-prong design allows use in almost anything that accepts a three-prong adapter. Great for TVs, speakers, stereos,...
  • STURDY AND FLEXIBLE: Indoor/Outdoor use SJTW vinyl cord sets constructed with double insulation and molded-on plugs, designed for water resistant and...
  • SAFETY ASSURANCE: ETL approved with a standard NEMA 15-5-P grounded power plug to a NEMA 5-15R connector; SJTW 13A/300V/1625W
Bestseller No. 12
Heavy Duty Extension Cord Wire, (3 FT) Ideal for Air Conditioner and Major Appliance
  • Angle Plug Allows cord to remain flush to wall in tight spaces
  • Sturdy cord Ideal for plugging in large appliances such as washers, dryers, or refrigerators, power tools and other major appliances
  • Grip grooves allow easy connection and disconnection of cord
  • 1875 Watts -15 Amps/14 Gauge/3 Conductor wire - SPT-3/125 Volt. ETL Listed
  • Heavy Duty vinyl Insulation, Color of cord may vary
Bestseller No. 13
Heavy Duty Extension Cord Wire, (6 FT) Ideal for Air Conditioner and Major Appliance
  • Angle Plug Allows cord to remain flush to wall in tight spaces
  • Sturdy cord Ideal for plugging in large appliances such as washers, dryers, or refrigerators, power tools and other major appliances
  • Grip grooves allow easy connection and disconnection of cord
  • 1875 Watts -15 Amps/14 Gauge/3 Conductor wire - SPT-3/125 Volt. ETL Listed
  • Heavy Duty vinyl Insulation, Color of cord may vary
Bestseller No. 14
Uninex EC1412AUL Air Conditioner and Major Appliance Extension Cord, Heavy Duty, Grounded, 14/3 AWG,...
  • Heavy Duty Air Conditioner and Appliance Extension Cord
  • 12ft,14/3 AWG, SPT-3, 15A 125V 1875W, UL listed
  • Right angle male plug, Heavy duty vinyl insulation
  • Grounded, Three-Pronged Plug Helps Protect Against Shock
  • Use with air Conditioners, dehumidifiers, power tools & appliances and much more
SaleBestseller No. 15
UltraPro 25 Ft Extension Cord, 3-Outlet Power Strip, Double Insulated, Grounded, Heavy Duty, 16...
  • Specifications – This grounded 3-wire, 16AWG extension cord is rated for 125VAC/13A/1625W and adds (3) 3-prong outlets to any grounded AC...
  • Heavy-Duty – Double-insulated cord and one-piece molded plug provide extra durability while vinyl jacket protects against moisture, dust and dirt to...
  • Extended Reach – Extra-long 25ft. cord is great for tools like hand drills and jig saws requiring an extended reach.
  • High Visibility – The bright orange finish of this cord makes it easy to spot, increasing safety and reducing tripping hazards around the house.
  • Safe – This unit is UL Listed and is backed by the highest industry standards of safety and performance. UltraPro is the #1 brand in extension cords...
Bestseller No. 16
Bergen Industries Inc PS915143 3-Wire Appliance and Power Tool Cord, 9 ft, 14 AWG, 15A/125V AC,...
  • For use with MAJOR APPLIANCES, MOTORS and POWER TOOLS, U-Ground NEMA 5-15
  • APPLICATION: SJTW: Hard SERVICE cord, THERMOPLASTIC/Vinyl constructed JACKET, 300 Volt, WEATHER RESISTANT for OUTDOOR USE
  • IDEAL FOR appliances, motors and power tools
  • APPLICATION: 9 Foot 14/3 cord with U Ground NEMA 5-15 plug and pigtail end
  • APPLICATION: Rated For: 15 Amp, 125V, 1875 Watts max applications
SaleBestseller No. 17
ECHOGEAR On-Wall Surge Protector with 6 Pivoting AC Outlets & 1080 Joules of Surge Protection - Low...
  • 1080J rating protects your devices from electrical surge damage & is fireproof to keep your entire home safe. Remember to always use protection...for...
  • Triple your outlet capacity with 6 pivoting AC heads that can handle all your electronics. A study we just conducted says 6 outlets are better than 1....
  • Installs in seconds over existing outlets, with a low 1.50" profile to keep your cables out of the way.
  • Filters your electricity current to eliminate dirty power caused by signal interference. UL safety certified with a 5 year, $25k connected equipment...
  • Hit a snag with install? Our Minnesota-based product nerds are available 7 days a week to help out.
Bestseller No. 18
Clear Power 6 ft 14/3 Gray Air Conditioner/Major Appliance Indoor Extension Cord, Grounded Flat...
  • HEAVY DUTY GROUNDED CORD: 14 gauge wire has double-thick insulation to protect against heat build-up. With 3-prong grounded plug the 6 ft indoor power...
  • FLAT PLUG: Right angle plug allows furniture & appliances to be placed safely close to the wall. Perfect for tight spaces. Plug dimensions 1/2 inch...
  • SAFETY: Extra thick SPT-3 wire resists cracking and breaking. 100% pure copper conductors avoid from getting overheating. Maximum electrical rating:...
  • DURABLE & STURDY: Nickel coated brass blades for high corrosion resistance. Reinforced strain reliefs protect the wire from separating from the plug...
  • MULTIPURPOSE: The grey 14-AWG flat cord is ideal for dehumidifiers, window & in-wall air conditioners, and other major appliances.
Bestseller No. 19
POWTECH Heavy duty 6 FT Air Conditioner and Major Appliance Extension Cord UL Listed 14 Gauge, 125V,...
  • Air Conditioner and Major Appliance Extension Cord UL Listed. Sturdy cord Ideal for plugging in large appliances such as washers, dryers, or...
  • Angle Plug Allows cord to remain flush to wall in tight spaces
  • Heavy duty vinyl insulation, 14 Gauge, 1875 MAX Watts ,15 Amps,125V
  • UL LISTED - meeting the required safety standards, Safe for ANY ROOM in your home or office
  • WHITE
SaleBestseller No. 20
UltraPro Gray Heavy Duty 5-Outlet Extender, Outdoor Extension Cord Adapter, Resettable Circuit...
  • Outdoor adapter – Each outdoor-rated extension cord charging hub has 5 grounded, 3-prong outlets and accepts bulky charging adapters and plugs.
  • Save space – Create a centralized charging station for household appliances, electronics, tools, landscape lights and seasonal decorations, laptops,...
  • Peace of mind – Integrated circuit breaker with reset switch protects against overloads by cutting power to your electronics in case of a voltage...
  • Innovative design – Built-in power indicator light lets you know that your connected devices are charging safely. Ergonomic handle and plug-in...
  • Perfect color – Gray and black finish easily integrates into any décor to prevent your powering station from becoming an eyesore.

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  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Heavy Duty Extension Cord For Space Heater.
  5. Customer Ratings: Number ratings grade Heavy Duty Extension Cord For Space Heater objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Heavy Duty Extension Cord For Space Heater.
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FAQ:

Q: What extension cord to use for air conditioner?

A: The utility cords stocked in such stores are safe for lamps and electronic equipment, but not for for air conditioners. Most air conditioner cords have a three-prong connection, so be sure to select a three-prong extension cord.

Q: Why is my extension cord Hot?

A: If the cord has been in the sun there is no problem. If the cord is hot you are using too much current. If it is just a little warm, that is caused by resistance in the wire which turns current into heat as part of the inefficiency of transmitting electricity.

Q: Can you use extension cords with electric fireplaces?

A: Electric fireplaces that come with a power cord should be plugged straight into a standard electrical outlet. An electric fireplace should not be plugged into any type of extension cord .

Q: What is a heater cord?

A: A heater core is a radiator-like device used in heating the cabin of a vehicle. Hot coolant from the vehicle’s engine is passed through a winding tube of the core, a heat exchanger between coolant and cabin air.