KOVEA Spider Windshields

KOVEA Spider + ultra-light windshield made from drinks cans

The MercatorGear R&D Lab has been experimenting with windshields made from used aluminium drinks cans. These greatly improve boil time and fuel efficiency.

We have developed 3 designs and tested them extensively in different conditions.

Here are some of our test configurations.

MARK 1: Original version (18g)

Mark 1: 2 sections of can. Optional foil pie dish base. Air inlet on down-wind side.

MercatorGear Windshield Mark 1

Mark 1: Cold weather test running on pure butane. 

Foil pie dish reflects heat and provide stability in a gusty wind.

The wide base of the aluminium kettle makes for an extremely efficient and light weight water boiling system.

The windshield covers most of the sides of the kettle. This increases the heating area, and prevents heat loss through the sides.

Large air inlet on the down wind side helps to maintain efficient combustion and provides a heat outlet to help prevent overheating.

By retaining and reflecting the heat, the windshield contributes to even heating of the base of the pan. This further improves frying/cooking performance.

Mark 1. System Weight: KOVEA Spider (168g) + aluminum kettle (140g) +windshield (18g)  = 326g (11.5oz)


MARK 2: Ultra light solo version (12g)


Mercatorgear windshield Mark 2

Mark 2: Ultra-light solo version. Weighs 12g. Clips onto legs of KOVEA Spider. Air-inlet on down-wind side. Windshield fits inside titanium pot. 

This configuration is optimised for solo usage and minimal size. The large air inlet provides plenty of oxygen for combustion and acts as a heat outlet to prevent overheating.

Mark 2 System Weight: KOVEA Spider (168g) + MSR Titan kettle (118g) + windshield (12g) = 298g (10.5oz)


MARK 3: Wrap Around Version (22g)

 mercatorgear windshield mark3

Mark 3 setup

Mark 3 out on the windy beach

Mark 3: Wrap around version made from 3 sections of drinks can, stapled together. Cut-out for pot handles.  Cut-out for gas pipe inlet. Air holes at base. Using large/tall beer cans allows the wind shield to go most of the way up the pan, thereby improving heating efficiency. Weight 22g. Used with any 1.3 litre pan. For lightest weight configuration we use an Evernew Titanium 1.3L pan. When packed, the windshield wraps around the butane canister and is held with rubber bands. This takes up virtually no space and is quick to deploy, and is extremely efficient.

Mark 3 System Weight: KOVEA Spider (168g) + Evernew 1.3 Titanium (115g) + windshield (22g) = 305g (10.8oz)



  • Windshield greatly improves fuel economy and reduces boil time
  • To maintain safe operations the KOVEA Spider is NEVER used at full power with a close fitting windshield
  • 50% power is usually enough to prevent overheating which could damage the stove and windshield
  • Reduced airflow adversely impacts combustion efficiency resulting in an increased generation of dangerous carbon monoxide. All testing is conducted outside for this reason. When used inside a tent (where wind in not a problem) make sure there is a large air gap on one side of the windshield to allow plenty of oxygen to reach the flame.

If you have any good ideas for windshields, or want to discuss our designs, please send an email to This email address is being protected from spambots. You need JavaScript enabled to view it.



reduce reuse recycle 

Reuse aluminium cans to make windshields for your KOVEA Spider.

Reduce your gas consumption and canister usage by using a windshield. .

Recycle: off-cuts from drinks can experiments .   

KOVEA Spider with KOVEA safety valve butane adapter
£ 53.49 each KOVEA Spider "Butane" - includes KOVEA Igniter & Butane Adapter for low cost aerosol-type canisters (FREE EU P&P) This item will be sold starting on 2020-08-13
Kovea Spider without igniter
£ 44.00 each KOVEA Spider "Basic" - 4 Season remote canister stove (FREE EU P&P) This item will be sold starting on 2020-08-14