Delivery to
goods.your_address
VEVOR US EN/ USD
Select the country/region, language, and currency you prefer for shopping.
Hello, Sign in
Account & Order
Categories
Deals
Deals by Categories
Shop All Shop All Outdoors Outdoors
Appliances Appliances Automotive Automotive
Tools Tools Plumbing Plumbing
Electrical Electrical Building Materials Building Materials
Sports & Outdoors Sports & Outdoors Heating, Venting & Cooling Heating, Venting & Cooling
More Ways to Save
Bulk Savings
Bulk Savings
Clearance
Clearance
Best Sellers
Best Sellers by Categories
Shop All Shop All Outdoors Outdoors
Appliances Appliances Automotive Automotive
Tools Tools Plumbing Plumbing
Electrical Electrical Building Materials Building Materials
Sports & Outdoors Sports & Outdoors Heating, Venting & Cooling Heating, Venting & Cooling
New
New by Categories
Shop All Shop All Outdoors Outdoors
Appliances Appliances Automotive Automotive
Tools Tools Plumbing Plumbing
Electrical Electrical Building Materials Building Materials
Sports & Outdoors Sports & Outdoors Heating, Venting & Cooling Heating, Venting & Cooling
Inspiration & DIY
Inspiration
Inspiration
DIY Projects & Ideas
DIY Projects & Ideas
Find Store Near You
Member Club
Product Recall
Download VEVOR App
Get $5.00 Off $99.00+ Orders on Your First 3 App Orders
Scan the QR code to download
Home Plumbing Water Heaters Tankless Water Heaters

Search for "indoor heaters for indoor use"

Heating, Venting & Cooling
Outdoors
Plumbing
51 Results
Popular
Categories
Price
Under 30
30 ~ 50
50 ~ 100
100 ~ 200
200 & Above
Customer Rating
5 stars only
4 stars and up
3 stars and up
2 stars and up
1 star and up
Special Offers
On Sale
Bulk Savings
In Stock
Pickup
Quick look
VEVOR Propane Tankless Water Heater, 4.3Gal Indoor 100000 BTU Instant Hot Water Heater, Smart Temperature Control & Clear LED Display & Multiple Security Protections for Whole House, Silver Gray
(56)
169.9
169.9
Deal after registering
Member discounted price
0% cash back at checkout.
169.9
Non-PRO Account
169.9
Save
Non-PRO Account
In Stock.
Add to Cart
Clearance
Quick look
VEVOR Portable Electric Space Heater with Thermostat, 1000W/1500W 2-Level Adjustable Quiet Ceramic Heater Fan, 9 in Tip-Over Shutdown Flame-Retardant PP Small Heaters for Office Room Desk Indoor Use
(42)
24.99
24.99
Deal after registering
Member discounted price
0% cash back at checkout.
24.99
Non-PRO Account
24.99
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Kerosene Forced Air Heater, 175000 BTU Portable Air Space Heater with Thermostat, 13.2 Gallon Tank Energy-Efficient heavy-duty Heater, for Indoor Outdoor Use Workshop Industry
(101)
329.9
329.9
Deal after registering
Member discounted price
0% cash back at checkout.
329.9
Non-PRO Account
329.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Electric Garage Heater, 15000-Watt with Remote Control & 10 Hour Timer & Overheat Protection Wall/Ceiling Mounted Shop Heater, Commercial Fan-forced for Indoor Workshop Warehouse,240V White
(134)
329.9
260.99
Deal after registering
Member discounted price
0% cash back at checkout.
329.9
Non-PRO Account
329.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Electric Oil Filled Radiator, 1500W Radiant Space Heater with LED Screen, Over-Heat Protections,24h Timer, Portable Handle Casters, Thermostat,Remote Control for Indoor Use,Black
(36)
87.9
66.99
Deal after registering
Member discounted price
0% cash back at checkout.
87.9
Non-PRO Account
87.9
Save
Non-PRO Account
Out of Stock
View Details
Quick look
VEVOR Gas Tankless Water Heater, 4.3Gal Indoor 100000 BTU Instant Hot Water Heater, Smart Temperature Control & Clear LED Display & Multiple Security Protections for Whole House,Silver Gray
(56)
169.9
169.9
Deal after registering
Member discounted price
0% cash back at checkout.
169.9
Non-PRO Account
169.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Electric Garage Heater, 10000-Watt with Remote Control & 10 Hour Timer & Overheat Protection Wall/Ceiling Mounted Shop Heater, Commercial Fan-forced for Indoor Workshop Warehouse,240V White
(134)
219.9
161.99
Deal after registering
Member discounted price
0% cash back at checkout.
219.9
Non-PRO Account
219.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
New
Quick look
VEVOR Infrared Heater 1500W Electric Space Heater with Remote Control, 3 Heat Settings, 12H Timer, Overheat Shutoff, Portable Wheels, Premium MDF, for Indoor Bedrooms, Offices, Studies, Light Wood
(109)
98.99
98.99
Deal after registering
Member discounted price
0% cash back at checkout.
98.99
Non-PRO Account
98.99
Save
Non-PRO Account
Almost sold out
Add to Cart
Quick look
VEVOR Electric Garage Heater, 5000-Watt (2500/5000W) Ceiling Mounted Shop Heater, With Remote Control & Overheat Protection & Low Noise Cross-flow, Commercial for Indoor Workshop Warehouse,240V White
(134)
145.9
105.99
Deal after registering
Member discounted price
0% cash back at checkout.
145.9
Non-PRO Account
145.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Electric Garage Heater, 5000-Watt Wall/Ceiling Mounted Shop Heater for 2 Cars, Overheat Protection & 3 Adjustable Angles, Heavy Duty Commercial for Indoor Workshop Warehouse,240V White
(134)
119.9
89.99
Deal after registering
Member discounted price
0% cash back at checkout.
119.9
Non-PRO Account
119.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Electric Garage Heater, 5000-Watt (2500/5000W) Ceiling Mounted Shop Heater, 2 Settings & Overheat Protection & Low Noise Cross-flow, Commercial for Indoor Workshop Warehouse,240V White
(134)
129.9
97.99
Deal after registering
Member discounted price
0% cash back at checkout.
129.9
Non-PRO Account
129.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Electric Garage Heater, 4800-Watt with Remote Control & 10 Hour Timer & Overheat Protection Wall/Ceiling Mounted Shop Heater, Commercial Fan-forced for Indoor Workshop Warehouse,240V White
(134)
117.9
82.99
Deal after registering
Member discounted price
0% cash back at checkout.
117.9
Non-PRO Account
117.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Kerosene Forced Air Heater, 70000 BTU Portable Torpedo Diesel Space Heater with Thermostat, 5 Gallon Tank Energy-Efficient heavy-duty Heater, for Indoor Outdoor Use Workshop Industry
(101)
203.9
203.9
Deal after registering
Member discounted price
0% cash back at checkout.
203.9
Non-PRO Account
203.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Electric Garage Heater, 8500-Watt with Remote Control & 10 Hour Timer & Overheat Protection Wall/Ceiling Mounted Shop Heater, Commercial Fan-forced for Indoor Workshop Warehouse,240V White
(134)
169.9
123.99
Deal after registering
Member discounted price
0% cash back at checkout.
169.9
Non-PRO Account
169.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Kerosene Forced Air Heater, 215000 BTU Portable Torpedo Diesel Space Heater with Thermostat, 13.2 Gallon Tank Energy-Efficient heavy-duty Heater, for Indoor Outdoor Use Workshop Industry
(101)
359.9
359.9
Deal after registering
Member discounted price
0% cash back at checkout.
359.9
Non-PRO Account
359.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 9000 BTU Portable Kerosene Heater & Stove, 2 in 1 Non-Electric Indoor Outdoor Heater with Adjustable Height & Flame & Easy Storage,for Camping, Hunting, Cooking, Home, Garage, Black
(8)
82.9
82.9
Deal after registering
Member discounted price
0% cash back at checkout.
82.9
Non-PRO Account
82.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Pool Heat Exchanger, 210K BTU Swimming Pool Heater Exchanger, 316L Stainless Steel Construction, High Efficiency Water to Water Transfer Heating System for Spa, Hot Tub, Indoor/Outdoor, Silver
(5)
160.9
160.9
Deal after registering
Member discounted price
0% cash back at checkout.
160.9
Non-PRO Account
160.9
Save
Non-PRO Account
Only 1 Left, order soon
Add to Cart
Quick look
VEVOR Pool Heat Exchanger, 600K BTU Swimming Pool Heater Exchanger, 316L Stainless Steel Construction, High Efficiency Water to Water Transfer Heating System for Spa, Hot Tub, Indoor/Outdoor, Silver
(5)
309.9
309.9
Deal after registering
Member discounted price
0% cash back at checkout.
309.9
Non-PRO Account
309.9
Save
Non-PRO Account
Only 4 Left, order soon
Add to Cart
Quick look
VEVOR Patio Heater for Outdoor Use, 48000BTU Pyramid Propane Heater w/Wheels, Quartz Glass Tube Outdoor Patio Flame Heater for Patio, Party, Backyard, Garden, Decoration, Silver
(34)
219.9
219.9
Deal after registering
Member discounted price
0% cash back at checkout.
219.9
Non-PRO Account
219.9
Save
Non-PRO Account
Almost sold out
Add to Cart
Quick look
VEVOR Pool Heat Exchanger, 360K BTU Swimming Pool Heater Exchanger, 316L Stainless Steel Construction, High Efficiency Water to Water Transfer Heating System for Spa, Hot Tub, Indoor/Outdoor, Silver
(5)
292.9
292.9
Deal after registering
Member discounted price
0% cash back at checkout.
292.9
Non-PRO Account
292.9
Save
Non-PRO Account
Only 5 Left, order soon
Add to Cart
Quick look
VEVOR Propane Heater, 6000 to 18000 BTU Propane Cabinet Heater with 3 Modes Temp Settings & Tip-over Protection, Garage Radiator Heat up to 450 Sq.Ft, for Camping,Garage, Patio,Indoor/Outdoor
(35)
109.9
109.9
Deal after registering
Member discounted price
0% cash back at checkout.
109.9
Non-PRO Account
109.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Hanging Patio Heater, 1500W Outdoor/Indoor Electric Space Infrared Heater, IP34 Protection Ceiling Heater with 23.6 inch Pull Cord & 20 inch Adjustable Chain, for Porch,Patio,Dining Room,Studio
(109)
60.99
60.99
Deal after registering
Member discounted price
0% cash back at checkout.
60.99
Non-PRO Account
60.99
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Hanging Patio Heater, 1500W Electric Space Infrared Heater, IP34 Protection with 23.6 inch Pull Cord & Adjustable Chain, for Porch,Patio,Dining Room,Studio Outdoor/Indoor
(109)
69.9
69.9
Deal after registering
Member discounted price
0% cash back at checkout.
69.9
Non-PRO Account
69.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Infrared Heater, 1500W Electric Space Heater with Remote Control, LED Screen w/ 3 Speeds & Timer, Outdoor/Outdoor for Patio,Porch,Dining Room,Studio
(109)
115.9
115.9
Deal after registering
Member discounted price
0% cash back at checkout.
115.9
Non-PRO Account
115.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Electric Fireplace Insert, 26 inch Recessed and Wall Mounted with Adjustable Flame Color Brightness & 8h Timer & Remote Control, Indoor Heater w/ 750W/1500W Dual Heating Modes, 5000BTU Black
(35)
139.9
139.9
Deal after registering
Member discounted price
0% cash back at checkout.
139.9
Non-PRO Account
139.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Infrared Heater, 1500W Electric Space Heater with Remote Control, 2 Speeds & Easy Operate, Indoor/Outdoor for Patio Bedroom,Studio,Porch,Dining Room,Studio
(109)
119.9
119.9
Deal after registering
Member discounted price
0% cash back at checkout.
119.9
Non-PRO Account
119.9
Save
Non-PRO Account
Only 2 Left, order soon
Add to Cart
VEVOR Electric Fireplace Insert, 40 inch Recessed and Wall Mounted with Adjustable Flame Color Brightness & 8h Timer & Remote Control, Indoor Heater w/ 750W/1500W Dual Heating Modes, 5000BTU Black
(35)
239.9
239.9
Deal after registering
Member discounted price
0% cash back at checkout.
239.9
Non-PRO Account
239.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Portable Air Conditioner and Heater Combo, 14000 BTU (9800 BTU SACC) 5-in-1 Standing Cooling Ac Unit, LED Touch Panel & Remote Control, 24h Timer, Dehumidifier/Fan/Sleep Mode for Room Indoor
(55)
449.9
449.9
Deal after registering
Member discounted price
0% cash back at checkout.
449.9
Non-PRO Account
449.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Greenhouse Heater, 1500W PTC Fast Heating with Overheat Protection, 3-Speed Setting Small Grow Tent Heater, Electric Portable Heater Fan for Green House, Flower Room, Workplace
(147)
38.59
38.59
Deal after registering
Member discounted price
0% cash back at checkout.
38.59
Non-PRO Account
38.59
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Electric Fireplace Insert, 35 inch Recessed and Wall Mounted with Adjustable Flame Color Brightness & 8h Timer & Remote Control, Indoor Heater w/ 750W/1500W Dual Heating Modes, 5000BTU Black
(35)
212.9
177.99
Deal after registering
Member discounted price
0% cash back at checkout.
212.9
Non-PRO Account
212.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Infrared Heater, 1500W Electric Space Heater with Remote Control & 3 Speeds & 24H Timer & Multiple Security Protections, Indoor/Outdoor for Bedroom,Studio,Porch,Dining Room,Studio
(109)
89.9
66.99
Deal after registering
Member discounted price
0% cash back at checkout.
89.9
Non-PRO Account
89.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Under Desk Space Heater,Rollable Foot Warmer Portable for Home&Office,Timer & Secure,Quiet for Legs,Ankles,Touch&Remote Control Personal Electric Round Surround Warming Pad,Over-Heat Protection
(20)
55.9
55.9
Deal after registering
Member discounted price
0% cash back at checkout.
55.9
Non-PRO Account
55.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Infrared Heater, 1500W Electric Space Heater with Remote Control, LED Screen & 24H Timer, Multiple Temperature Adjustable for Patio Bedroom,Living Room,Studio,Dining Room
(109)
109.9
85.99
Deal after registering
Member discounted price
0% cash back at checkout.
109.9
Non-PRO Account
109.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Dog House Heater, 800W Pet Heater House with Overheat Protection, Adjustable Temperature & 24H Timer, Portable Electric Warmer with Anti-Bite Metal Material, Lightweight Chicken Coops Heated
(15)
63.9
63.9
Deal after registering
Member discounted price
0% cash back at checkout.
63.9
Non-PRO Account
63.9
Save
Non-PRO Account
Only 4 Left, order soon
Add to Cart
Quick look
VEVOR Propane Heater, 125000BTU Forced Air Propane Heater with Stepless Temp Settings & security Protection, Portable Garage/Shop Barrel Heater for Garages, Job Sites,Indoor/Outdoor
(35)
159.9
125.99
Deal after registering
Member discounted price
0% cash back at checkout.
159.9
Non-PRO Account
159.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Propane Heater, 60000BTU Forced Air Propane Heater with Stepless Temp Settings & security Protection, Portable Garage/Shop Barrel Heater for Garages, Job Sites,Indoor/Outdoor
(35)
109.9
85.99
Deal after registering
Member discounted price
0% cash back at checkout.
109.9
Non-PRO Account
109.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Convection Panel Heater, 1500W Electric Panel Space Heater with Remote & Touch Control, Portable Stand or Wall Mount Design with Anti-Tipping and Overheat Protection for Home and Office, White
(22)
82.9
82.9
Deal after registering
Member discounted price
0% cash back at checkout.
82.9
Non-PRO Account
82.9
Save
Non-PRO Account
Only 1 Left, order soon
Add to Cart
Quick look
VEVOR Propane Heater, 100000BTU Forced Air Propane Heater with Stepless Temp Settings & security Protection, Portable Garage/Shop Barrel Heater for Garages, Job Sites,Indoor/Outdoor
(35)
149.9
119.99
Deal after registering
Member discounted price
0% cash back at checkout.
149.9
Non-PRO Account
149.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Quick look
VEVOR Patio Heater for Outdoor Use, 50000BTU Propane Heater Tall Hammered With Round Table Design, Metal Burner and Wheels, Fixed Outdoor Patio Flame Heater for Patio, Party, Backyard, Garden, Bronze
(34)
143.9
143.9
Deal after registering
Member discounted price
0% cash back at checkout.
143.9
Non-PRO Account
143.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Electric Oil Filled Radiator, 1500W Radiant Space Heater with Dual U-shaped Heating Tubes, Over-Heat Protections,3 Heat Settings,24h Timer, Flexible Casters, Remote Control for Indoor,Black
(36)
111.9
82.99
Deal after registering
Member discounted price
0% cash back at checkout.
111.9
Non-PRO Account
111.9
Save
Non-PRO Account
Out of Stock
View Details
VEVOR 8 KW Diesel Air Heater, Bluetooth App Control All-in-one Diesel Heater with Automatic Altitude Adjustment, Remote Control and LCD, Portable Parking Heater for RV Trailer Camper Van Boat
(2,541)
135.9
135.9
Deal after registering
Member discounted price
0% cash back at checkout.
135.9
Non-PRO Account
135.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Electric Fireplace Insert, 28.5 inch Recessed and Wall Mounted with Adjustable Flame Color Brightness & 8h Timer & Remote Control, Indoor Heater w/ 750W/1500W Dual Heating Modes, 5000BTU Black
(35)
159.9
159.9
Deal after registering
Member discounted price
0% cash back at checkout.
159.9
Non-PRO Account
159.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Patio Heater for Outdoor Use, 50000BTU Propane Heater Tall Hammered With Round Table Design, Metal Burner and Wheels, Fixed Outdoor Patio Flame Heater for Patio, Party, Backyard, Garden, Silver
(34)
143.9
143.9
Deal after registering
Member discounted price
0% cash back at checkout.
143.9
Non-PRO Account
143.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Greenhouse Heater with Thermostat, 1500W PTC Fast Heating with Overheat Protection, 3-Speed Setting Small Grow Tent Heater, Electric Portable Heater Fan for Green House, Flower Room, Workplace
(147)
57.9
57.9
Deal after registering
Member discounted price
0% cash back at checkout.
57.9
Non-PRO Account
57.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Patio Heater for Outdoor Use, 50000BTU Propane Heater Tall Hammered With Round Table Design, Metal Burner and Wheels, Outdoor Patio Flame Heater for Patio, Party, Backyard, Garden, Silver Gray
(34)
136.9
136.9
Deal after registering
Member discounted price
0% cash back at checkout.
136.9
Non-PRO Account
136.9
Save
Non-PRO Account
Only 3 Left, order soon
Add to Cart
Clearance
Quick look
VEVOR Greenhouse Heater with Thermostat, 1500W Fast Heating with Overheat Protection, 2-Speed Setting Small Grow Tent Heater, Electric Portable Heater Fan for Green House, Flower Room, Workplace
(147)
73.99
73.99
Deal after registering
Member discounted price
0% cash back at checkout.
73.99
Non-PRO Account
73.99
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric PTC Space Heater with Fan, Low & High Heat Modes, 40° Adjustable Angle, Overheat Protection, Portable for Grow Tent, Small Greenhouse, Flower Room, Home Office
(147)
29.9
29.9
Deal after registering
Member discounted price
0% cash back at checkout.
29.9
Non-PRO Account
29.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric PTC Space Heater with Fan, Low & High Heat Modes, 15° Adjustable Angle, Overheat Protection, Portable for Grow Tent, Small Greenhouse, Flower Room, Home Office
(147)
32.9
32.9
Deal after registering
Member discounted price
0% cash back at checkout.
32.9
Non-PRO Account
32.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric Space Heater with Fan & High Heat Modes, IPX4 Protection, 25° Adjustable Angle, Overheat Protection, for Grow Tent, Small Greenhouse, Flower Room, Home Office
(147)
59.9
59.9
Deal after registering
Member discounted price
0% cash back at checkout.
59.9
Non-PRO Account
59.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric PTC Space Heater with Fan, Low & High Heat Modes, Overheat Protection, Tip-Over Shut-Off, Portable for Grow Tent, Small Greenhouse, Flower Room, Home Office
(147)
35.9
35.9
Deal after registering
Member discounted price
0% cash back at checkout.
35.9
Non-PRO Account
35.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric Space Heater with Fan & High Heat Modes, IPX4 Protection, 25° Adjustable Angle, Overheat Protection, for Grow Tent, Small Greenhouse, Flower Room, Home Office
(147)
59.9
50.99
Deal after registering
Member discounted price
0% cash back at checkout.
59.9
Non-PRO Account
59.9
Save
Non-PRO Account
In Stock.
Add to Cart
Related searches
indoor car electric indoor
See more
VEVOR 8 KW Diesel Air Heater, Bluetooth App Control All-in-one Diesel Heater with Automatic Altitude Adjustment, Remote Control and LCD, Portable Parking Heater for RV Trailer Camper Van Boat
In Stock.
Add to Cart
1
You May Also Like
Today's Deals For You
Recently Viewed
Tips & Inspiration
Recommended Searches
indoor thermostat indoor thermostat indoor heat best heaters indoor use heaters for indoor use heaters indoor use 208v 3p 9kw sauna heater little space heater portable electric shop heaters for garage outside space heater space heater used 100v sauna heater ac and heater machine my heater 20qmp water heater 2kw diesel heater 12v plateau used heater the best space heater diesel heater 2024 new ceiling-mount propane garage heater