You already have an oil or gas boiler in good condition, but want to escape fuel costs? Replacing only the burner with an analog pellet burner is the most economical solution, you keep your boiler (body, heat exchanger, chimney, connections) and change only the unit that produces the flame.
When a Pellet Burner Makes Sense (Instead of a New Boiler)
- Your existing boiler is under 10 years old and in good condition
- You want to avoid the cost of purchasing + installing a new boiler
- Oil or gas costs are high but your system works well
- You have space for a pellet tank near the boiler room
If the boiler is old (>15 years) or in poor condition, better to go for a complete new pellet system like the PELIT PL20.
How Many kW You Need for 120 sqm
| Building characteristics | Burner Power |
|---|---|
| Good insulation, Zone A–B | 15–20 kW (AP20) |
| Medium insulation, Zone B–C | 20–28 kW (AP20 or AP30) |
| Older construction, Zone C–D | 28–35 kW (AP30) |
Important: The burner must “match” the existing boiler power. If you have a 32 kW boiler, a 20 kW burner won’t utilize the entire heat exchanger and will run continuously without meeting demand. If you have a 24 kW boiler and install a 35 kW burner, it will overheat and generate smoke.
Recommended AXINAR Burner Models for 120 sqm
1. AXINAR APOPLIM AP20, Analog 20 kW
Ideal for homes of 100–130 sqm with good/medium insulation.
- Analog power modulation based on demand
- Automatic auger cleaning, minimal maintenance
- Digital control with weekly schedule
2. AXINAR APOPLIM AP30, Analog 30 kW
For larger boilers or homes with low insulation/cold zones. Covers 120–150 sqm in Zone C/D.
- 50% more maximum power than AP20
- Automatic auger cleaning
- Same control and warranty
What the Pellet Conversion Includes
- Removal of the old burner (oil or gas), ~30 minutes
- Installing the pellet burner on the boiler flange, adaptable to standard flanges
- Installing the pellet tank (200–500 kg depending on space)
- Auger connection (transfer screw) from tank to burner
- Electrical connection and combustion parameter adjustment
- Test operation and flue gas measurement for combustion certification
Overall, one installation takes 1 working day by a technician specialized in pellet burners.
Indicative Pellet Consumption (120 sqm)
- Zone A: 900–1,100 kg/year
- Zone B: 1,100–1,500 kg/year
- Zone C: 1,400–1,850 kg/year
- Zone D: 1,750–2,300 kg/year
Want to See If Conversion Fits Your Case?
Send us the basics of your setup and we’ll get back within 24 hours with a specific model recommendation and indicative installation cost.
For a detailed picture of power calculation and comparison with complete pellet systems, see the complete boiler selection guide.
