Brewery heat-loss · ASTM C680

Where a brewery loses heat — and what it costs

Updated 14 September 2026 · ASTM C680 / ISO 12241 method

Select your equipment to compare heat loss before and after insulation. Use your operating data to calculate energy and cost savings. Jump to: Brewery estimate · Brewhouse · Boilers & utilities · Packaging. Find a site on the BreweryAtlas map.

Surface ≤45 °C touch-safe Up to 96% heat-loss cut Payback <2 years ASTM C680 method
Annual savings
$117,300
vs. uninsulated baseline
Payback
< 1.5 yr
average, recent projects
Energy saved
2,012 MWh
fuel not burned
CO₂ reduction
433 t
0.215 t per MWh gas

Reference site: UK mid-size brewery, full-site Inzonex Modular Insulation (boiler house + brewhouse + packaging + process pipework). Natural gas ≈ $58/MWh, 95% heat-loss reduction.

01 / Where your brewery loses heat

Brewery equipment by area

Choose an area, then select the equipment you want to calculate.

Select your equipment and enter its exposed area, quantity and surface temperature. Adjust the fuel price and ambient temperature below. The calculation uses the operating hours and insulation cost assumptions shown here. You can send the equipment list to us for a quotation.

Assumptions: Operating hours: brewhouse 6,600; boiler house 8,000; packaging 4,000 per year. Payback assumes $250/m² installed insulation cost.

Get a tailored assessment for your brewery

Send the equipment and operating data you want assessed. We will return a quotation and a PDF breakdown of kW, MWh/year, CO₂ and payback.

What would you like us to look at?
Boiler house Brewhouse Packaging CIP / process lines Whole site

Kettles and tuns hold large hot surfaces for hours each brew. Covering the tops — conical, domed, dished or flat — holds wort temperature and cuts kettle energy.

Choose your equipment. Compare it before and after insulation, then enter your dimensions and operating data to calculate heat loss and annual savings.

Steam boiler and its fittings

Steam boilers

Doors, burner flanges, manholes and boiler fittings.

Calculate heat loss
Plate heat exchanger with frame and plate pack

Plate heat exchangers

Set the exchanger dimensions, temperature and quantity.

Calculate heat loss
Valves, a Y-strainer and connecting pipework

Valves, strainers & pipework

Add individual valves, filters and pipe lengths to one calculation.

Calculate heat loss
Steam header with branch valves

Steam headers

Header body, branch valves and connecting pipes.

Calculate heat loss
Boiler installation examples and insulation details Bosch boiler installation. Photographs and thermal images of the insulated door, burner flange and steam valves, with recorded surface temperatures of up to 190 °C before → approximately 30 °C after. View the result Boiler-house utilities case. See the FLIR-verified Cochran result, including the measured surface-temperature drop after removable insulation. View the utilities case ->

Calculate heat loss from pasteuriser and bottle-washer roofs. Enter the exposed area, surface temperature and operating hours for your equipment.

Put a number on a single item

Pick any hot surface, enter its size and temperature, and see the energy, money and CO₂ that Inzonex modular insulation would save — with payback. ASTM C680 method, no sign-up. Not a brewery? Run the whole-plant industrial heat-loss & CO₂ calculator.

Open the calculator
02 / Why Inzonex

Construction and maintenance access

Fasteners, a replaceable insulation core and panels shaped to the equipment. Product & tech specs

Easy installation

Snap-button fastening

Stainless snap buttons open and close by hand. Remove the insulation for maintenance or inspection, then refit it without drilling into the equipment.

Replaceable core

Zip-out insulation core

Unzip the outer shell to remove the mineral-wool core. The core can be replaced separately, without replacing the shell.

Made to fit

Follows the equipment's shape

Sections are made to the equipment dimensions, with openings for pipe connections, instruments and controls.

03 / Methodology & buyer questions

Brewery heat-loss — FAQ

How much heat does an uninsulated brewery lose?
A small-to-mid brewery loses tens of kilowatts continuously from bare kettles and tuns, the boiler door and valves, pasteuriser roofs and feed-water lines. In the example calculation (ISO 12241, convection + radiation, lightly-ventilated hall at 25 °C with 0.5 m/s air) a bare wort-kettle face loses ≈1,100 W/m² at 99 °C, and a Bosch steam boiler's bare fittings alone ≈25 kW. Removable insulation cuts each by ~90–95%.
What temperature are the main vessels?
Wort (brew) kettle ≈99 °C at the boil, mash tun ≈68 °C, lauter tun ≈77 °C at mash-out, whirlpool ≈92 °C, cereal/adjunct cooker ≈95 °C; steam and condensate lines and boiler fittings run 120–300 °C. The surface temperature drives the loss — each is modelled at its real operating temperature.
Which equipment is worth insulating first?
The hottest, longest-running surfaces: the boiler door and steam-side fittings (≈180–300 °C), then the wort kettle and whirlpool, then the pasteuriser roof and feed-water pumps. The boiler house usually shows the fastest payback.
How much can it save, and how fast is the payback?
Up to 96% heat-loss reduction, with an insulated-surface design target of ≤45 °C. For a full brewery (brewhouse + packaging + boiler house) payback is typically around 13 months on the figures in this tool, and well under 2 years for most single items.
How is Inzonex different from insulation jackets / blankets?
Inzonex Modular Insulation is made to the dimensions of each piece of equipment. Snap-button fasteners open by hand for maintenance access. The outer shell unzips so the insulation core can be replaced separately. Shell materials include silicone-coated or PTFE-coated fabric, selected for the operating conditions.
Do you replace our metal cladding / lagging?
Existing sheet-metal cladding can remain in place. The assessment identifies exposed valves, doors, flanges, manholes and other fittings that need removable insulation.
Does insulating hot surfaces lower the brewhouse temperature?
Insulation reduces the heat released from equipment into the room. The resulting room temperature depends on ventilation, other heat sources and the building. This tool calculates equipment heat loss, not room temperature.
Is the insulation removable for cleaning and inspection?
Yes. Snap-button fasteners open by hand so sections can be removed for inspection, cleaning or valve access and refitted afterward. The zipped shell allows the insulation core to be replaced separately.
What is the lead time?
End-to-end — production + delivery + installation — about 4–6 weeks in Europe and 8–12 weeks worldwide (sea freight). As a breakdown: production 2–6 weeks, EU delivery under a week, sea delivery roughly 4–6 weeks. Minimum order 100 pieces.
How long does it last, and what's the warranty?
The outer shell lasts on the order of 15 years; the PAROC stone-wool core is independently replaceable, so a cover is renewed rather than scrapped. Rated for service up to +600 °C. Covers carry a 3-year warranty (excluding leaks and similar process faults), and an optional annual paid service.
Kettles & tunsHeat loss from brewhouse vessels and how to cut it Boiler houseDoor, valves, flanges & steam traps Steam & condensateThe hidden losses in F&B pipework
Want the maths? Every figure comes from the same ASTM C680 / ISO 12241 model — read the full methodology