If you have ever walked into your warehouse on a cold morning, noticed the heating has been running for two hours, and still found yourself reaching for a coat — you are not alone. It is one of the most common complaints we hear. And in most cases, the heating system is not actually the problem.
The real culprit is something called heat stratification. Warm air is lighter than cold air, which means it rises. In any building with high ceilings — a warehouse, a factory, a large workshop — that warm air travels straight up and sits near the roof, where nobody works. The people at floor level stay cold, the heating keeps running, and the fuel bills keep climbing.
The good news is that this is usually a straightforward problem to fix. You do not necessarily need a new heating system. What you almost certainly need are destratification fans — and in many cases, adding them is far quicker and less expensive than you might expect.
What is actually happening
Think about what happens when you fill a bath with hot water and then add cold water on top — without stirring, the hot water sits at the surface and the cold settles below. The same principle applies in a large building. Your heating system may be working perfectly, but the warmth it produces rises straight to the top of the building, typically two to four metres above the people who actually need it.
In a warehouse with six or eight metre ceilings, the temperature difference between floor level and roof level can be as much as ten degrees Celsius. You could have a fully operational, properly serviced heating system, and still have a workforce spending the day in their coats.
Why most people assume the heating system is to blame
When a building stays cold, the natural instinct is to blame the heating. Perhaps the boiler is underpowered, the system is too old, or the building has poor insulation. These can be contributing factors — but they are rarely the main cause in a building that previously felt warmer, or in a newly fitted space that never quite reaches a comfortable temperature.
We regularly carry out site surveys where the heating system is in perfectly good working order. The problem is simply that the warm air it produces has nowhere useful to go. Replacing or upgrading the system in that situation would be an expensive solution to the wrong problem.
The destratification fan solution
Destratification fans are designed specifically to address this issue. Mounted at ceiling level, they gently push the warm air that has gathered near the roof back down towards the floor, where it is actually needed.
They are low-energy devices — typically using a fraction of the power consumed by the heating system itself — and in most buildings they can be installed without significant disruption to day-to-day operations.
The impact is often felt quickly: better comfort at floor level, and a reduction in how hard the heating system needs to work to maintain temperature. Many businesses also see a noticeable improvement in running costs, because when warm air is being circulated properly rather than pooling at the ceiling, the heating cycles less frequently and uses less fuel.
A properly designed destratification solution could lead to up to a 30% reduction in running costs of the system.
When you might need more than fans
Destratification fans solve the stratification problem effectively, but they are not a remedy for every situation. If your heating system is significantly undersized for your space, approaching the end of its serviceable life, or using a fuel type that is no longer right for your site, the system itself will need attention alongside the fans.
The layout and use of your building also matters. If you have substantial ventilation requirements — loading bays that remain open for long periods, for instance — radiant heating may be a better fit than warm air, because radiant heat warms people and objects directly rather than depending on air temperature. The right answer depends on the specifics of your building and how it operates.
This is why a site survey is always the right starting point. It is genuinely difficult to make a reliable recommendation without understanding the space first.
What a Harry Taylor site survey involves
When we visit a site, we assess the building dimensions, ceiling height, insulation, current heating equipment, fuel supply, and how the space is actually used day to day. We also factor in any specific requirements — unusual working environments, dust or chemical exposure, high ventilation demands, and so on.
From that assessment, we put together a clear recommendation: what is causing the problem, what will fix it, and a realistic picture of costs. There is no obligation. If your existing system simply needs a different configuration rather than replacement, we will tell you so — even if it means a smaller job for us.
We have been carrying out this kind of work since 1925. There is a reasonable chance we have seen your exact situation before.
Book your free site survey
If your warehouse or workplace is not reaching a comfortable temperature — or if your heating bills feel disproportionate to the warmth you are getting — a site survey is the fastest way to get a clear, honest answer.
Contact us to arrange yours. We work across the full UK mainland from offices in both the North and South of England, and there is no charge for the survey itself.
Call us on 020 8464 0915 (Southern office) or 0161 308 4550 (Northern office) for more, or click here for your free site survey.