Top 8 Best Ventless Gas Heater Review 2021

Best Ventless Gas Heater Review.

If you’re looking for a reliable source of heat in event of a power outage, a ventless heater is an ideal solution.

Prices on my list range, $119 – $249.

#1.) Dyna-Glo Ventless Heater
#2.) Mr. Heater Natural Gas Ventless Heater
#3.) Blue Flame Gas Ventless Heater
#4.) Dyna-Glo Natural Gas Ventless Wall Heater
#5.) Mr. Heater Radiant Natural Gas Heater
#6.) Mr. Heater Gas Garage Heater
#7.) Mr. Heater 20K BTU Natural Gas Heater
#8.) Coming soon!

** FYI: links go to Amazon (had lowest heater prices)

The Best Gas Ventless Heater 2020

#1.) Dyna-Glo Natural Gas Ventless Heater

Best Natural Gas Ventless Heater

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Dyna-Glo blue flame ventless heater model on natural gas and heats spaces of 1000 sq. ft. (one of the larger heaters on my list)

A versatile option, it can be used as a freestanding or wall-mounted ventless heater.

Power: 30,000 BTU

Room size: 1,000 sq. ft.

Pricing: Medium

To allow for convection heat, they included a blue flame heating along w/ multiple safety features.

overheat-shutoff, emergency use, protects from power outage

Also comes w/ legs for use as a space heater –  a few buyers say it is the best propane ventless heater for winter. Easy variable control knob lets you customize heat settings.

Buyers confirm it’s a super easy install too!

Lots of positive buyer reviews!


  • Electronic ignition
  • Convection heating
  • Heats large rooms
  • Auto shut-off safety
  • Works during power outages
  • Good price!


  • One size model

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#2.) Dyna-Glo Propane Ventless Heater

Propane Ventless Gas Heater

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Dyna-Glo Propane Gas Heater is the best ventless heater for large rooms up to 1,000 sq. ft.

Powerful enough to heat most areas — from a garage, cabin, or just a room in your home.

Power: 30,000 BTU

Room size: 1,000 square ft.

Pricing: Medium

Best thing about Dyna-Glo’s propane wall heaters is that they don’t run on electricity – You can rely on them even during a power outage!

Heater runs on a liquid propane system making it cost effective.

Also comes w/ a remote control so you can adjust the temp!

Good safety feature is the new oxygen depletion sensor to notify you of toxic or hazardous gasses.

Lots of good buyer reviews online!

#3.) Blue Flame Natural Gas Ventless Heater

Blue Flame Natural Gas Ventless Heater

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Blue-flame 30,000 BTU ventless heater by Dyna-Glo can warm up large rooms.

As a user-friendly ventless heater, the Blue Flame model includes a temperature control knob – super easy to adjust heat levels.

Room size: 1,000 sq. ft.

Pricing: Medium

Requiring zero energy, you’ll be able to rely on this heater if the electricity has gone out.

If you live in an area prone to storms and power outages the electricity-free system is a nice feature. Similar to an infrared space heater, it can operate on low power for long hours.

Good price and positive reviews online.

#4.) Dyna-Glo Natural Gas Ventless Heater

Blue Flame Ventless Gas Heater

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The Dyna-Glo 30,000 BTU model works comes w/ a natural gas function – It uses blue flame tech to allow convection heat to warm the room.

It works similarly to a central heating system, except that it can be more portable.

Room size: 1,000 sq. ft.

Pricing: Affordable

Buyers like how you’re able to control the exact heat that you’d like to keep the room at too.

Comes w/ built-in thermostat – easy to control the heat level w/ the control knob on the side.

One of the best natural gas ventless heater models for winter.

Read our review on Electric Fireplace Inserts.

#5.) Mr. Heater Radiant Natural Gas Heater

MRHEATER Best Ventless Gas Heater

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The Orange-flame, 20,000 BTU ventless gas heater comes with a safety auto-shutoff feature for low oxygen level.

I liked how they’ve included a wall mount in case you’d rather have it take less room – in this way it is similar to a mini split heat pump unit.

Rooms: 4,500 sq. ft.

Pricing: Affordable

As a ventless gas heater you can it provides a nice, ambient heat.

In terms of power it can heat larger rooms of 4,500 square feet. It’s one of the larger ventless heaters on my list.

Also includes radiant heat and auto-shutoff, safety feature.

#6.) Mr. Heater Natural Gas Heater

Mr. Heater Natural Gas Garage Heater

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Blue-flame Mr. Heater has power of 30,000 BTU and can heat rooms up to 750 sq. ft.

Like the other Mr. Heater’s on my list, it features an auto-shutoff safety feature that kicks in if the oxygen level has dipped too low. It’s a fantastic mechanism that keeps you out of harm’s way.

To ensure stable convection heat is able to be produced, they’ve incorporated a blue flame.

⭐⭐ Best Ventless Gas Heater for Smaller Rooms ⭐⭐

I also liked how they included a thermostat. This lets you keep an eye on the temperature. Furthermore, they provide you with everything you need to mount the heater to a wall.

Alternatively, you could stand it up on the legs provided if you wanted to be more mobile with it.


  • Power: 30,000 BTU
  • Room size: 750 square ft.
  • Weight: 26.7 pounds
  • Best ventless gas heater for smaller spaces
  • Auto shutoff feature
  • Blue flame tech
  • Thermostat included

Potential Flaws

  • Can produce a smell when in operation

#7.) Mr. Heater 20k BTU Natural Gas Heater

Mr. Heater 20k BTU Natural Gas Heater

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This ventless gas heater includes a thermostat lets you control the overall room temperature — the top dial (which you can see on the image above) make it easy to adjust.

⭐⭐ Best Ventless Gas Heater for Small Rooms ⭐⭐

Subtle blue-flame tech, it’s one of the smaller heaters on my list – ideal for rooms up to 500 sq. ft.

To ensure safety, it also comes with an auto-shutoff feature.


  • Power: 20,000 BTU
  • Room size: 500 square ft.
  • Weight: 28.7 pounds
  • Best ventless gas heater for smaller rooms
  • Thermostat available
  • Auto shutoff feature
  • Quiet operation

Potential Flaws

  • Aluminum material may be too soft for some

** I’ll be adding #8-10 Best Ventless Gas Heater later this year! Stay tuned!

Ventless Propane Heater Reviews

Now that you know more what the best ventless gas heaters have to offer, you can start to narrow down your search.

Buyers have fallen in love w/ the versatility of ventless heaters – they are super easy to install and come w/ wall mount + legs for use as a home space heater.

The price is also a nice benefit.

Opposed to smaller heaters or full HVAC install, a propane ventless heater will cost under $200. Compare that to the price of a mini split heat pump system which cost $800+ per heating unit.

Be sure to consider all the main features and potential downsides prior to picking one out.

Hope our review helps to make the entire process quick and easy!

Best Ventless Gas Heater Review 2020

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Electric Fireplace Inserts

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