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A successful factory or warehouse heating project starts with an accurate description of the site, before any equipment list. Floor area matters, but a single square-meter figure is not enough if ceiling height, insulation, doors, loading arrangements, machinery, racking, where people work and shift patterns are not taken into account. Capacity and layout are not two separate tasks either. Where and when heat is needed determines the number of heaters, their positions and how they are controlled, all at once.
This guide sets out a decision sequence you can follow in factory and warehouse projects. It does not replace a site survey or engineering calculation. Its purpose is to make clear what data the project owner should prepare, what outputs to look for in quotes and which risks to close off before installation.
Define the project objective in one sentence
At the first meeting, set a measurable usage objective instead of simply saying “we want to heat the space.” Is an even temperature expected throughout the enclosed volume? Will only the production lines where people work be heated? Is the priority frost protection for goods, shift comfort or fast warm-up? Are the warehouse’s dispatch doors open all day? These questions change the system approach.
The objective should include the following:
- Which parts of the building will be heated
- The hours those areas are in use
- Fixed and mobile workstations
- Process temperature or ventilation requirements
- How doors and loading areas operate
- Problems experienced with the existing system
- The level of control and monitoring expected
If the objective is unclear, the project may try to compensate for uncertainty by oversizing heater capacity. That is not a sound approach in terms of either investment or operation. BUGASS’s Project Design & Site Survey approach is designed to build decisions on site data.
Collect survey data in a standard file
Measurements and observations made during the survey should not stay in meeting notes. The floor plan, section, roof height, column spacing, door and window dimensions, building materials and existing service routes should be recorded in a shared project file. Photos should be matched to locations, with mounting areas, the gas line, electrical panel and flue routes documented in particular.
For a factory, production lines, crane runways, machinery, extraction and fresh air points should be added to the plan. In a warehouse, rack height, forklift routes, fire protection systems, loading doors and the temperature sensitivity of goods are important. Existing building drawings should be checked against the situation on site, and any partitions or services added later should be recorded separately.
This preparation does not just serve the capacity calculation. The feasibility of the layout, installation access and future maintenance all draw on the same data.
Assess the factors that drive heat loss together
Heat demand depends on how the building interacts with the outside. Wall and roof construction, glazing, doors, air leakage and mechanical ventilation are the main factors. A high ceiling increases the volume to be heated even when the floor area stays the same. Opening large doors can cause significant air changes in a short time.
Machinery, ovens, motors or processes running in a factory can create heat gains. But those gains may not be constant throughout the day. The temperature requirements of stored goods may also differ from human comfort. That is why calculation inputs should be linked to the facility’s actual operating schedule rather than a single general assumption.
Generic online tables or capacity ratios taken from another facility should not be used as project evidence beyond a first impression. The right approach is to assess the building envelope, air changes, target conditions and hours of use with local data. For the general principles of system selection, see our guide to choosing an industrial heating system.
Think about distribution, not just total capacity
The calculated total demand does not on its own tell you how the heaters should be distributed. The same total capacity can be delivered by different numbers of heaters in different positions, but the results may not be the same. Where heat is generated, the direction it travels and the target zones determine the quality of distribution.
When warm air heaters are used, discharge directions, return air, column and rack obstructions, door drafts and where people work are all considered together. A heater with a powerful discharge does not guarantee even results across the whole area if the airflow is blocked by obstructions. Heaters need to be positioned so they support one another, and cold spots need to be anticipated.
In a radiant approach, the layout is built around radiation reaching target surfaces, coverage of work zones, mounting height and safety clearances. Ceramic radiant and radiant tube options have different layout geometries. The same arrangement may not suit a linear production line, a picking area and a loading point.
You can see how the system families differ in more detail in our industrial heating systems comparison.
Zoning brings the operating pattern into the project
If not every part of the factory or warehouse is used at the same time, a single control zone can be inefficient. Production lines may run on different shifts, the dispatch area may be busy only at certain times of day, and the maintenance department may be used only when needed. Zoning is how these differences are reflected in the control system.
Zone boundaries are not drawn by walls alone. Hours of use, target temperature, system type and the air or radiant distribution within the area are also taken into account. A zone sensor placed right next to a door or directly under a heat source can give false readings. Sensor location is as important as heater layout for reliable control logic.
The control strategy should define the following situations:
- Normal shift start and end times
- Weekend and holiday operation
- Temporary use of specific zones
- Dispatch periods when doors stay open for long periods
- Faults, safety shutdowns and the restart procedure
- Settings that authorized users are allowed to change
A clear control setup reduces the need for operators to keep correcting the system by hand and makes performance easier to monitor.
Resolve installation routes on paper
A layout plan should consist of more than heater symbols. Gas, electrical, control and flue or exhaust lines, hanger and support details, service access and work platforms should all be shown on the plan. Going to site without a clash check can lead to heaters being moved during installation and the calculated distribution being compromised.
Cross-discipline coordination is needed particularly where there are cranes, sprinklers, lighting, ventilation ducts or cable trays under the roof. In warehouses, ask whether the racking may change in future. Combustible materials and minimum clearances around radiant heaters must be maintained not only for the layout on day one, but for the way the facility is actually used.
The load-bearing capacity of the mounting point must be confirmed by qualified people, and hangers and connections chosen in line with the manufacturer’s instructions. If no data sheet is available, request the correct document rather than proceeding with values from a similar product.
Make service access part of the layout
It should be accepted from the outset that equipment installed under the roof will need maintenance. Safe access must be provided to inspect filters, fans, heat exchangers, burners, controls, reflectors, tubes or connections. The space for opening service panels around the heater, the approach for platforms and the points where power can be safely isolated should all be planned.
A layout without maintenance access may look tidy at installation, but in the event of a fault it causes longer downtime and additional work-safety requirements. That is why showing service clearances and the access method on the quotation drawing is a good acceptance criterion. For your existing system, you can use our Technical Service channel, and for the general framework of planned maintenance, see our radiant heater maintenance guide.
What should the quotation file include?
A professional heating project quote should be more than a list of models and quantities. To make the decision traceable, the quote or its attachments should include:
- The survey data and project assumptions used
- A definition of the heating objective and zones
- The reasoning behind the proposed system family
- Heater capacity, quantity and layout plan
- The scope of gas, electrical, control and flue infrastructure
- Hanger, installation and safety clearance requirements
- The scope of commissioning and user briefing
- The technical documents to be handed over
- Warranty and service responsibilities
- A clear list of work not included in the quote
This structure makes it easier to compare different quotes on the same scope. Missing items become visible before they turn into cost or schedule risks later on.
Commissioning is the project’s final check
Finishing the installation does not mean the system is ready for use. During commissioning, connections, safety devices, the control sequence, fan or combustion behavior, the flue arrangement and sensor readings must be checked by qualified people. Whether the heaters match the layout plan, and the results in the work zones, should be observed.
The user should be shown normal operation, shutdown, fault warnings and when to call an authorized service technician. Current operating and maintenance documents should be handed over and the settings made should be recorded. During the first period of operation, the system should be monitored under different outdoor and production conditions, and control times adjusted by the authorized team if necessary.
Measure and keep records after installation
A project’s success is not measured by the statement “the heater is working.” Temperature behavior in the defined zones, run times, user feedback and the effect of door traffic should be monitored. Measurement points should be chosen to match the project objective; never assume a single sensor represents the entire building.
Maintenance and fault records make recurring problems visible. When racking, partitions, machinery or shifts change, the layout and control strategy should be reviewed. The heating system may be a fixed investment, but the operation it serves can change over time.
Make sure you receive a complete project close-out file
When the installation is complete, receiving the invoice and warranty certificate alone is not enough. The as-built heater layout, connection routes, control zones, commissioning settings, product label details and current operating documents should all be in the project close-out file. If changes made on site have not been recorded, the maintenance team may work from an outdated drawing. The file should also include the authorized service contact details, periodic inspection responsibilities and a record of the training given to users.
An owner for the file should be assigned within the organization, and a digital copy kept accessible. New maintenance staff, the facility manager or an external service team can then understand the system’s history from this record. Whenever heater positions or the operating pattern change, the same file should be updated. This discipline prevents project knowledge from leaving the facility along with the installation team.
At the close-out meeting, the project objectives should be re-read and any open items assigned to a responsible person with a date. If a zone’s settings are not finished, a document is missing or user training needs to be repeated, these should not be left as verbal notes. The acceptance record should clearly state the outstanding work, who is responsible and how it will be verified. This stops a temporary fix from becoming permanent and lets facility management know which points are being followed up.
Conclusion: capacity, layout and control are one project
In factory and warehouse heating, the right capacity is determined by the building’s volume, heat losses, air changes and operating pattern. The right layout carries that capacity to the target zones. Zoning and controls ensure the system runs according to the facility’s actual schedule. Treating these three topics separately can lead to solutions that look adequate on paper but perform unevenly on site.
You can share your project’s floor dimensions, ceiling height, hours of use and existing services through the Get a Quote form. Reading our product series guide before comparing BUGASS product families will help you start the discussion with a common framework. The final decision should always be based on current technical documents, a site survey and authorized installation conditions.
Keeping the approved project file up to date makes the impact of on-site changes on capacity, layout and control decisions clearly traceable in later reviews.
