Best seller Firefly 12kW Stainless Steel Patio Heater

Firefly 12kW Stainless Steel Patio Heater

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Featured as one of our favourite gas patio heaters for 2020. Click here to see here why and get the latest prices for the 12kW Premium Stainless Steel Garden & Outdoor Gas Patio Heater.


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Set Alert for Product: Gas Patio Heater Garden Outdoor Freestanding Metal Stainless Steel Firefly™ 12kW - £157.99
Last Amazon price update was: 21st April 2021 8:03 pm
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Last updated on 18th April 2021 2:07 pm
Firefly 12kW Stainless Steel Patio Heater
Firefly 12kW Stainless Steel Patio Heater



This heater is featured in our “best patio heaters for 2020” post. Made from stainless steel this powerful gas powered patio heater will keep you and your friends or clientele warm for hours.

Firefly – 12kW Stainless Steel Gas Patio Heater

Measuring in at 238cm tall this patio heater is anything but small! Built from stainless steel this heater should survive the elements season after season and keep you warm in style.

Heating Area

This patio heater has an approximate heating area of 19.6sqm thanks to its 80cm diameter reflecting head. This is on par with other 12kW gas heaters available on the market.

Heating Type

You can use propane or butane with this heater. There is a storage area underneath this heater which will hold a tank up to 11kg in size.

Power Settings & Specifics

The Firefly 12kW stainless steel patio heater comes with a handy integrated push and turn ignition switch which instantly lights the patio heater and it doubles up as a power control switch as well. Giving you adjustable heat up to 12kW (40,000BTUs). It should be mentioned that while the burner is stainless steel, the stand is powder coated steel, so it’s worthwhile purchasing the cover.


We’re big fans of the stainless steel look. Not only is it practical it offers a level of protection against the weather. If you’re going to get a gas patio heater, you might as well spend the extra £10 on a stainless steel version as not only do they look better than their non-powder steel counterparts, they’ll last a darn sight longer too!

Features & Extras

You get a fair few extras for your money so bear with us!

Each patio heater comes with a flame safety feature which turns the gas off should you lose flame ignition. It also has a safety tilt switch, which also cuts off the flame should this heater fall –  making it a lot more family friendly.

For a heater in this price range we were pleasantly surprised to see that the gas regulator and hose included (for an 11kg tank).

This heater is pretty heavy, coming in at 27kg – thankfully it comes with transport wheels attached to the base.

The only thing that’s really missing is a cover, but you can buy these separately when in stock.

Suitable For

Great for both home and commercial users. As with all gas patio heaters, please only use them outside!

Cost to Run?

Based on a 12000W free standing patio heater & a 11kg tank of gas (refill only) costing £29.99

12000W = 0.8kg (Based on the manufacturers 800g/h rating)

11kg / 0.8kg = 13.75 hours per 11kg tank of gas

£29.99 / 13.75 hours (At Full Power @12kW) =  £2.18 per hour

Low Power 5kW = £0.90 per hour

How long with my gas tank last?

This depends on the size of your tank, but we’ve got you covered whatever your tank size! These figures are based on full power usage.

Tank (KG)Hours

Heater Specification

  • Cost at time of review (22nd September 2017): £109.99 – View Latest Price
  • Type of heater: Gas, Free Standing
  • Suitable for: Home, Commercial
  • Comes with: Gas Hose & Regulator, Safety Features, Transport Wheels, Side Door for Tank Storage
  • Height: 238cm
  • Diameter: 80cm (head & base)
  • Weight: 27kg
  • Power settings: 5kW to 12kW Variable
  • Cost to run (per hour): From 90p per hour with a 11kg tank
  • Additional: Push & Click Ignition, Optional Patio Heater Cover

PatioMate’s Thoughts

7.6 Total Score
Firefly 12kW Premium Stainless Steel Patio Heater

Featured as one of our favourite gas patio heaters for 2017.

Purchase Cost
Running Costs
  • Stainless Steel Build
  • Adjustable Temperature
  • Features Galore
  • Handy Storage Unit
  • Comes with Regulator & Hose
  • Isn't Cheap to Run
Add your review  |  Read reviews and comments

We can’t fault this heater. It does require some assembly but aside from that you’re golden!

Additional information

Specification: Firefly 12kW Stainless Steel Patio Heater



Build Material

Powder Coated Steel, Stainless Steel


Gas Regulator & Hose, Safety tilt shut off valve, Tank Storage, Wheels


Floor Standing

Fuel Type


Heat Coverage


Power Consumption


Price History


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  1. Rosie Britton

    I read somewhere that this heater is silent but your info doesn’t mention the noise. it would be nice to be able to see one on display but Firefly only seems to sell through Argos other than on line.

    Any comments?


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  2. Seb

    Hi Rosie,

    Thanks for your comment. Gas burning heaters tend to be relatively quiet and while they do output some noise (think back to the old gas fires that we used to have in the living room) they really aren’t noticeable outdoors with ambient noise. – You can see a similar patio heater here (they’re pretty much all the same, just re-badged)

    – PatioMate

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