The first question is not “what should we buy?”
The first question is whether the existing installation can realistically reach the required future performance with a technically coherent upgrade. That requires an engineering review of the cremator, combustion, secondary chamber, filtration, mercury abatement, extraction, monitoring, automation and energy interfaces.
Some installations may justify a targeted retrofit. Others may need a major abatement upgrade. Others may have reached the point where replacement is more technically and economically coherent than continuing to modify an ageing platform.
Four possible strategies
Optimise the existing installation
Combustion tuning, air distribution, control sequences, instrumentation, extraction and operating strategy can sometimes improve performance without major equipment replacement.
Retrofit selected systems
Automation, burners, refractory, charging, filtration, extraction, heat recovery or other subsystems can be modernised while retaining the main cremator structure where it remains technically sound.
Upgrade flue-gas treatment
Mercury abatement, reagent dosing, filtration, gas cooling, monitoring and draft control may need to be re-engineered independently of the cremator itself.
Replace the cremator
Replacement becomes relevant where the main thermal equipment no longer offers a credible long-term route to required performance, reliability, maintainability or future energy strategy.
What should be assessed before deciding?
1. Refractory and mechanical condition
Structural condition, refractory wear, door systems, charging interfaces, secondary chamber and mechanical auxiliaries determine whether the current unit still has meaningful residual life.
2. Combustion performance
Burners or heating system, combustion air, oxygen control, temperature stability, residence time, draft and cycle regulation should be reviewed as a complete thermal process.
3. Mercury abatement and filtration
Reagent type, dosing, gas temperature, mixing, filtration media, pressure loss, residue handling and extraction must be checked against the future operating objective. Explore flue-gas treatment & filtration →
4. NOx strategy
Where NOx reduction is required, the project may involve combustion optimisation and, depending on the application, a dedicated reduction technology. This must be assessed with the existing furnace architecture.
5. Automation and monitoring
Legacy control hardware, obsolete HMIs, incomplete instrumentation or poor data quality can make a technically viable cremator difficult to operate, diagnose or demonstrate as compliant.
6. Site and building constraints
Plant-room footprint, duct routes, stack, access, electrical capacity, gas connection, maintenance space and the need to keep the crematorium operational can be decisive.
A practical decision matrix
| Condition | Optimise / retrofit | Major abatement upgrade | Replacement |
|---|---|---|---|
| Main furnace condition | Good residual life | Good residual life | Ageing, worn or technically limiting |
| Combustion / thermal process | Can be tuned or modernised | Acceptable with downstream upgrade | Fundamentally constraining performance |
| Flue-gas treatment | Existing line broadly suitable | Insufficient for future target | Best redesigned with new cremator |
| Automation | Upgradeable | Upgradeable with treatment line | Obsolescence may support full replacement |
| Energy strategy | Current architecture still relevant | Current cremator retained, energy systems modernised | Opportunity to move to gas, electric or hybrid strategy |
| Best project question | What can be retained safely and effectively? | Can emissions performance be upgraded around the existing furnace? | Is further retrofit still rational over the remaining lifecycle? |
Mercury abatement can be the dividing line.
For many crematoria, the strategic question is not whether the cremator can still perform a cremation cycle. It is whether the complete installation can meet future emissions requirements once mercury abatement, filtration, monitoring and pressure-loss constraints are considered.
A technically sound cremator can still justify a new treatment line. Conversely, a worn cremator may make a large abatement investment difficult to justify if the main furnace is likely to need replacement soon afterwards.
Replacement can also be an opportunity to change energy strategy.
If replacement is already technically justified, the project becomes an opportunity to reconsider gas, electric or hybrid architectures, electrical infrastructure, heat recovery and future operating strategy rather than simply replicating the existing design.
Read Electric vs Gas vs Hybrid Cremators →
Heat recovery should be assessed at the same time.
Where flue gases need to be cooled before filtration, an upgrade or replacement programme can create a practical opportunity to recover heat. Hot water, steam or power generation may be considered depending on the real thermal profile and local energy demand.
Explore waste-heat recovery & energy valorisation →
CFI Systems approach
CFI Systems approaches a 2029 project as an asset-and-process assessment rather than a catalogue selection exercise. The objective is to determine what should be retained, what should be modernised and what should be replaced.
A credible retrofit should extend the useful technical life of the installation. A credible replacement should solve constraints that retrofit can no longer solve economically or reliably.
Frequently asked questions
Does PG5/2(25) mean every existing cremator must be replaced?
No. The correct strategy depends on the existing cremator, abatement system, monitoring, controls, residual equipment life and site constraints. Some installations may be suitable for optimisation or retrofit.
Can a new filtration system be fitted to an existing cremator?
Potentially yes. The engineering study should check gas flow, temperatures, cooling, pressure losses, extraction, available space, reagent systems and the remaining life of the cremator.
When does replacement become more sensible than retrofit?
Replacement becomes increasingly relevant where the main cremator is structurally or mechanically ageing, technically limits emissions performance, has obsolete controls or conflicts with the site’s future energy strategy.
Should heat recovery be studied during a PG5/2(25) upgrade?
Yes, where the gas temperature and local energy demand justify it. A major filtration or replacement project is often the right time to assess whether useful heat can be recovered without compromising treatment performance.
Can CFI Systems assess an existing crematorium before a final investment decision?
Yes. CFI Systems can review the thermal process, filtration, automation, extraction, energy systems and practical site constraints to develop retrofit, upgrade and replacement scenarios.