Gas vs Diesel Heaters: Understanding the Key Differences
When heating large industrial spaces like warehouses, construction sites, and workshops, the choice between gas and diesel heaters can significantly impact your operating costs, safety requirements, and heating efficiency.
Quick Comparison Table
| Feature |
Gas Heaters |
Diesel Heaters |
| Power Range |
10-50kW |
20-100kW+ |
| Fuel Type |
Propane/LPG |
Diesel/Paraffin/Kerosene |
| Fuel Cost per kWh |
Higher |
Lower |
| Indoor Use |
With ventilation |
Indirect-fired only |
| Portability |
Excellent (no fuel tank) |
Good (integrated tank) |
| Heat-up Speed |
Fast (radiant) |
Fast (forced air) |
| Maintenance |
Low |
Moderate |
Gas Heaters: Pros and Cons
Advantages
- Cleaner combustion - lower CO2 emissions
- Radiant heat - warms objects and people directly, not just air
- Excellent for outdoor/semi-outdoor use (patios, loading bays)
- No fuel storage needed - connect to propane cylinders
- Quieter operation than diesel
Browse our complete range of gas heaters from 10kW to 50kW.
Best Applications for Gas Heaters
Diesel Heaters: Pros and Cons
Advantages
- Lower fuel cost per kWh - diesel is cheaper than propane
- Higher maximum output (up to 100kW+)
- Integrated fuel tank - no external cylinder needed
- Indirect-fired models can duct heat to specific areas
- Better for very large spaces and extreme cold
See our diesel heater collection for industrial models.
Best Applications for Diesel Heaters
Safety Considerations
Gas Heater Safety
- Always ensure adequate ventilation
- Use models with oxygen depletion sensor (ODS)
- Check gas connections regularly
- CE-certified models include tip-over protection
Diesel Heater Safety
- Direct-fired models must only be used in well-ventilated areas
- Indirect-fired models are safe for enclosed spaces (exhaust vented outside)
- Use only approved diesel/paraffin fuel
- Regular filter and nozzle maintenance required
Running Cost Comparison
Running costs depend on fuel prices in your region, but as a general guide:
-
Propane: ~€0.12-0.15 per kWh
-
Diesel: ~€0.08-0.10 per kWh
Diesel is typically 20-30% cheaper to run per kWh of heat output, making it the preferred choice for continuous, high-demand heating.
When to Choose Gas vs Diesel
Choose Gas If:
- You need portable heating that can be moved easily
- The space has good ventilation or is semi-outdoor
- You want radiant heat (warming people directly)
- You're heating a patio, loading bay, or workshop
Choose Diesel If:
- You need maximum heat output for a very large space
- You want lower running costs for long-term heating
- You're on a construction site with limited infrastructure
- You need to duct heat to specific areas (indirect-fired)
Related Resources
Still unsure? Contact our heating experts for personalised advice. We'll help you choose the right heater based on your space, budget, and heating requirements.
