The Glasshopper is a Stirling engine fan built with a clear glass Borosilicate cylinder which shows the internal workings of the engine.
This highly versatile design allows it to work on most stove surfaces with the exception of diesel and catalytic stoves.
The Glasshopper will start working at 105° C (221° F) and its extra long run down time means it is highly suitable for use on Soapstone surfaces.
Named the Glasshopper for its ‘hopping’ internal cylinder, you will receive endless hours of enjoyment from viewing the mesmerizing moving parts.
When you use this Stirling engine fan you can reduce your wood usage by up to 22% and heat your room up to 40% faster.
PLEASE NOTE DUE TO A GLOBAL SHORTAGE OF PRECISION GLASS AND A LACK OF SUPPLY, THE BOROSILICATE GLASS PISTON SLEEVES MAY BE UPGRADED TO BURNISHED ALUMINIUM SLEEVES. THE ALUMINIUM PISTON SLEEVES OFFER SLIGHTLY IMPROVED PERFORMANCE.
Stirling Engine Design
Warpfive stove fans are small precision engineered Stirling engines, which are 100% mechanical and do not have any electric components which may stop working if overheated. Consequently they are extremely reliable and with care will last a lifetime. Find out more here
Every engine is precision engineered and hand built with durable materials like stainless steel, aluminium, brass and Borosilicate glass. As a result they operate quietly – typically 28dB.
Advanced materials (such as graphite) and low friction bearings ensure low maintenance, plus heat flow is optimised with a silver thermodynamic heat plate.
Stirling engine stove fans have a high power output and low start up speed so they move large volumes of warm air.
Every engine is hand-crafted, assembled and tested in Great Britain.
Warpfive 22/23 – New Range Explained
At Warpfive we are constantly striving for performance perfection so we are delighted to bring our latest range to you. Please take a look at the new product images to view the design modifications which include –
- Bearing cartridge system offering reduced friction and ease of replacement – read more here
- CNC acuminated aluminium posts, solid stainless steel base and upgraded displacer for improved thermodynamic performance
- A shortened, light-weight composite crank for higher RPM and increased power
- A beech wood handle for easy handling
Glasshopper Stirling Engine Fan
- Stirling engine fan with solid stainless steel base
- Borosilicate glass cylinders for viewing engine parts
- Start-up temperature of only 105° C (221° F)
- Maximum stove top temperature 450° C (842° F)
- Circulates in excess of 322 CFM (cubic feet per minute) of air
- Uses a large 4 blade high aspect ratio fan (285mm, 11.2 inch diameter) to circulate maximum air at low RPM
- Light weight composite crank
- Operation is quiet – typically 28dB
- Dust cover & maintenance kit included
- 3 year manufacturer’s warranty
- Overall height: 325 mm/12.8 inches
- Base dimensions: 110 mm/4.3 inches
- Weight: 1.8 kg/3.97 lbs
- Fan diameter: 285 mm/11.2 inches
Submit your review
Worth the wait for its availability. Throws out the heat from our alcove silently and warms the room well. Looks good and it’s a good conversation piece whether the stove is in use or not. I like the clear chamber so you can see the piston working.
Fan arrived very quickly in great packaging, engineered extremely well and works a treat. Looks fabulous when operating and still looks fab when not. Brilliant, thanks.
I decided to order the Glasshopper fan. It arrived very quickly and in great packaging. It works great, just put it on top of the stove and viola. It is truly a work of art, beautiful, and runs nearly completely silently.
Great design and engineering! It works very well on my soapstone stove. Quick and polite response, and prompt delivery increases trust to the product. The logo of "Great Britain" on the top plate is shining!
I ordered the Glasshopper for a friend of mine in New Zealand (on the back of my own purchase of the sidewinder). WarpFive are a very good company to do business with and any questions I posed were answered swiftly and actually called me back informing me they had found a cheaper courier.
The fan arrived in NZ 3 days ahead of forecast and my pal is delighted with the build quality, the engineering (even as they enter summer-it will be a centre piece?) and the warm fuzzy feeling that a small firm in Dawlish can make little gems like this! Chapea!
Recieved my twinspeed and glasshopper stove fans last week. Arrived after their long journey in excellent condition, nice to see the packaging is recycled/recyclable materials. The engineering and construction of these fans is second to none. Work like a dream and very quiet! Thoroughly enjoy watching them in action, almost mesmerizing. ????? from me.
Delivered at warp speed! Set it up really simply and lit the fire. When warm, gave the blade a little nudge and away it went. Great. Not much evidence of a draft from it and wonder whether the blades are as aerodynamic as they could be … but it looks great.