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Discover the Power Behind Every Degree. From rapid heating to whisper-quiet performance, every Hcalory heater is powered by innovative technology built for real-world adventures. Explore how smart engineering transforms warmth into reliability and comfort.
“I’ve tested countless diesel heaters—Toolbox MAX is easily the most advanced and safest yet. This heater’s smart, steady, and seriously quiet. Hcalory really listened to user feedback.”
"I've been using diesel heaters to stay warm in the winter for a couple of years now. TB MAX has crazy fuel efficiency and super quiet operation, app, and WATERPROOF capabilities that change everything!"
"NO HASSLE Heating For My Truck, Camper, & Gym Shipping Container. This heater delivers fast, reliable heat every time. It’s my go-to diesel heater!"
"Diesel Heater keeps my tent warm all night—No fuss setup, fast warmth, and I can control it from my phone. Perfect for off-grid adventures."
“Plug it in, prime it, and you’ve got heat in minutes. Great for my winter tests and camp reviews. I like that it runs steadily at low watts. Reliable warmth without killing my power station.”
This is a great heater, a little bigger and heavier than other diesel heaters I have. This comes with everything you need including a 110V AC to 12V DC adapter/transformer. This is great for me as I use it in the detached garage for winter and now I don't have to bother using my variable power supply and bits of wire to power the heater.
Great all in one portable unit with convenient handle to move around, nice capacity for long duration, includes everything you need to set up and start using. Great for camping, or supplemental or backup heat source. Good price, nice product.
This is not your average camping heater. It’s more than enough for the family camping trips but also has advance features for permanent installations. The you can create scenes, timers and adjust altitude in the app. The control panel acts like a house thermostat. The TB2S had no annoying ticking sound. Enjoying it so far.
Excellent product! Comes with a nice little remote that you can clip to your key fob. Great for Car Camping!
I got this 8KW Diesel Heater it is an all-in-one 7.5L Toolbox MAX version and I’m very happy with it so far. The app control and wireless temperature sensing are awesome features. I can monitor and adjust the heat right from my phone without needing to go out to the unit, in the cold. It warms up fast and puts out a surprising amount of heat for its size. It really does not have a odor which is nice. It has plenty of power and is made very durable.
Cold winter and been using an electric heater for my dog's large house, the only issue was when we lost power. I saw this heater and liked the fact that I could control it via the app, and the ability to run this on house power or a 12V battery. Dosg stayed nice and warm. Going to buy a 2nd one for my wife's greenhouse
I took this heater on a camping trip and wow — three minutes and the tent felt like summer. It’s compact but kicks serious heat. The aluminum body holds up great, and it runs quietly without that annoying hum that cheap heaters make.
The app control is a nice touch. I can adjust the temp without leaving my sleeping bag, which is a luxury when it’s freezing outside. It even senses the air temp automatically so you’re not constantly fiddling with it.
The fuel efficiency blew me away — I got more than two full nights off one tank. The design’s built smart too; it doesn’t lose power at high altitudes, so mountain camping’s no problem.
It’s tough, quiet, and efficient — basically the MVP for anyone who hates being cold.
Very quiet running, remote with usb-c and display and sensor great, the max is a great upgrade from my diesel heater. This is the Rolls Royce of heaters.
This is one of the best Diesel heaters out there. I use it to supplement the heat in a 30x50 shop. Lowered my consumption by 2/3, easy to use controller, I live in Idaho so I use the high altitude functionality, I have found it works way better on High Altitude all over the country, as we have one in our camper too. Best bang for the buck for the BTU's it puts out.
Have this heater wired up in a small building it knocks off the chill in the winter time and dose really good on fuel consumption ...
This is a great buy. I am building a little studio apartment, and I think this is going to be a great addition. First off, I have no power, so this is an off-grid heater. It runs great on a small power bank. Flawless setup and super easy to navigate with the app.
Love the Bluetooth feature. Works great as expected. Highly recommended!
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