Most commercial and agricultural sites have adequate wind resources — but suitability depends on exposure, shelter, and space. The best way to know is to walk the site and observe how trees move and how exposed features behave in wind.
A site is suitable if it has at least a modest height advantage over nearby obstacles, sufficient unshaded open space around the proposed turbine location, and access for installation and maintenance. Trees are not necessarily a problem — they shelter the ground while still allowing wind through at rotor height.
Wind patterns at ground level are nothing like wind patterns at height. Even a small hill, a tree line, or a building can create complex flow patterns and turbulence that reduce usable wind speed near the ground. But the same obstacles have far less impact at 2–5 metres (the typical rotor height for a WindWhisperer 50 or WindWhisperer 100 Max).
This is why professional wind assessments look at the surrounding landscape within a radius of several hundred metres: rolling terrain, tree heights, building silhouettes, and the exposure of the proposed turbine location relative to the prevailing wind direction.
The simplest rule: if the proposed turbine location is visible from a distance and can "see" the open sky in the direction of the prevailing wind, it has better exposure. If it sits in a hollow, surrounded by tall trees, or tucked behind a building, it is sheltered. Sheltered sites produce less energy, but they may still be viable depending on the wind class of your region.
The UK, Sweden, and Scandinavia are divided into wind classes based on long-term average wind speed and extreme gust statistics. Wind Class II sites have mean wind speeds up to 8.5 m/s at 10 metres height. Most agricultural, commercial, and rural sites fall into Class II or better.
If your site is in an exposed coastal location, an upland plateau, or a wind corridor (such as a valley or ridge that channels prevailing winds), it is likely Class II or Class III. If your site is inland, sheltered by trees, or in an urban area, it is likely Class II or lower.
A single indicator: if wind noticeably moves trees and flags in normal weather conditions, your site has useful wind resources. If the trees barely move, wind resources are marginal unless the proposed turbine location is significantly higher than the surrounding shelter.
A WindWhisperer 50 or WindWhisperer 100 Max requires:
On a farm, this is usually available — a turbine can sit in a field away from buildings and tree cover. On a commercial or industrial site, space may be more constrained. On a rooftop, space requirements are minimal because the turbine sits above the building.
Installation is always performed by certified third-party installers. You do not need to provide specialist equipment; the installer brings a mobile crane and all necessary rigging.
Many site owners assume trees kill wind potential. They do not — at least not at rotor height. Trees sheltering the ground have relatively little impact on wind 3–5 metres up. The problem is only if the proposed turbine location is _inside_ a tree canopy or sits in the dead zone immediately behind a large building or tree line.
Conversely, trees or buildings upwind of the site can actually be beneficial because they accelerate wind speed slightly over and around them — a principle called flow acceleration. A turbine placed on the sunny side of a ridge or the top of a slope often has surprisingly good exposure despite being surrounded by shelter on lower ground.
The rule: the proposed turbine location should be the highest point in its immediate area, with at least one free quadrant facing the prevailing wind. Even a modest height advantage (1–2 metres) over surrounding terrain makes a material difference.
Spend ten minutes observing how your site responds to wind:
1. Stand at the proposed turbine location. Look around: where do you see wind movement in the trees and vegetation?
2. Which direction does the wind come from in typical weather? (This is usually from a consistent direction or set of directions.)
3. Is the proposed location at the highest point of the site, or sheltered?
4. Can you see the open sky in the prevailing wind direction?
5. Are there tall buildings, tree lines, or terrain features downwind of the proposed location?
If you answer "yes" to questions 3 and 4, your site is likely suitable for a small wind turbine. If you answer "no" to both, it is marginal — but not necessarily ruled out. Professional anemometer data is the final word, but a site walk tells you 80% of what you need to know.
If you want to be certain, professional wind resource assessment combines site observation with anemometry — mounting a data logger with wind speed and direction sensors on the proposed turbine location for 3–6 months. The logger records wind speed, direction, and gust patterns. At the end of the period, a wind engineer produces an annual energy production (AEP) estimate based on local wind class and site-specific measurements.
This is not essential for every site. An experienced installer can often recommend a turbine size and configuration based on a site walk and regional wind class data. But if the site is marginal or if you want high confidence in your financial projections, anemometry removes guesswork.
Share your location and describe your site. We will evaluate wind class, shelter, and available space, then discuss the best WindWhisperer configuration for your conditions.
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