A roastery cut its energy bill 15–30% — by wrapping the drum it already owns.
No new machine. No rebuild. Just GPOWER Rouhe® nanoceramic aerogel wrapped around the roaster drum and exhaust. The result: a cooler, safer workshop and a retrofit that paid for itself in 6–18 months.
Your roaster is a radiator you pay to run
A drum roaster burns fuel mostly to heat metal and the room — not the beans. The hotter the drum skin and exhaust, the more energy escapes as wasted heat, higher gas bills, and an uncomfortably hot workspace.
Fuel is your second-biggest cost
Thermal efficiency of an uninsulated roaster is often under 50%. Most of the gas you burn leaves as heat through the drum skin and exhaust — every shift, every batch.
Bare metal burns people
An exposed drum and duct run painfully hot. Burn risk, a sweltering roast room in summer, and forced ventilation that wastes even more energy.
Temperature drifts between batches
Heat bleeding off the drum makes the thermal environment unstable, so profiles are harder to repeat and charge-to-charge consistency suffers.
Same roaster. Bare drum vs GPOWER-wrapped.
Drag the handle. On the left: the drum as it ships — glowing, radiating heat, hot to the touch. On the right: the same machine wrapped in GPOWER nanoceramic aerogel — the outer surface stays cool and safe while the roast chamber holds its heat.
Before · bare hot drum
After · GPOWER wrap
Figures are representative of a documented specialty-roastery retrofit. Exact savings vary with machine, existing insulation, roast profile and local fuel price; certified third-party testing is in progress.
Wrap the heat where it lives
GPOWER Rouhe® is a flexible, ceramic-fiber-reinforced aerogel composite. On a roaster it goes on as a precision jacket around the drum and the exhaust duct — capturing the heat that used to escape, so less fuel is needed to hold temperature.
- Thin & light — adds millimetres, not inches; no bulky refractory mass on a moving machine.
- Cool exterior — the wrap surface stays safe to the touch while the chamber stays hot.
- Same-day fit — wraps during a scheduled maintenance window; no machine modification.
- Stable profiles — steadier drum temperature between batches, easier repeatability.
What the roastery actually got
Less fuel, a cooler room, and a payback measured in months — not years.
“The drum holds temperature between batches now, the room stopped cooking in summer, and the gas bill dropped enough that the wrap paid for itself in well under a year.”
— Plant manager, specialty coffee roastery (field case)
The savings math, simply
Every unit of heat that used to leak through the bare drum is now kept in the roast. With 15–30% lower energy per kg of beans and no change to cup quality, the wrap's cost is recovered from fuel savings alone in 6–18 months — and it keeps saving for the life of the jacket.
Want the same number on your machine?
Send us your roaster model, drum size and fuel cost. We'll size a retrofit kit and estimate your payback before you buy.
Get my roaster payback estimateQuestions roasters ask us
In a documented specialty-roastery retrofit, GPOWER nanoceramic aerogel insulation reduced overall roaster energy consumption by 15–30%. Actual savings depend on the machine, existing insulation, roast profile and local fuel price.
It stabilises the thermal environment: the drum holds temperature more steadily between batches, reduces warm-up energy, and keeps the outer skin cool. Most roasters report more repeatable profiles, not a change in cup character.
The flexible roll form wraps the drum and exhaust duct like a jacket — typically a same-day install during a scheduled maintenance window, with no modification to the machine itself. Custom-cut jackets are available for specific models.
Based on documented field cases, payback from energy savings alone is typically 6–18 months, after which the insulation continues to save fuel for the life of the wrap.
Start your roaster retrofit
Tell us your machine and fuel cost — we'll send a retrofit kit proposal and a payback estimate, plus a free sample.