How Hardwood Pellet Compares
to Alternative Fuels
Fuel purchasing decisions based on price per ton alone often miss the full picture. The charts below compare the physical characteristics of common industrial boiler fuels, indexed against hardwood pellet as a baseline. Prices are not shown because they fluctuate, but the energy and ash ratios between these fuels are stable engineering facts.
Energy Density Comparison
Calorific value, indexed to hardwood pellet = 100. Higher is more energy per kilogram.
Source: standard fuel specifications (ISO 17225-2 for wood pellet, EN 14961-2, typical published values for coal and LPG)What this means: Rice husk pellet contains roughly 35% less energy per kilogram than hardwood pellet. To produce the same amount of heat in your boiler, you need to burn proportionally more mass, which affects fuel storage, handling frequency, and logistics cost.
Ash Content Comparison
Ash produced relative to hardwood pellet = 100. Lower is less residue and less boiler cleaning.
Hardwood pellet: typically ≤2% ash. Rice husk pellet: typically 15–20% ash. Coal: typically 10–20%.What this means: Rice husk pellet produces 8 to 10 times more ash than hardwood pellet per unit of fuel burned. Higher ash means more frequent boiler cleaning cycles, more downtime, and higher maintenance labour cost. Ash content is often a larger operational cost driver than fuel price.
Mass Required for Equivalent Heat Output
How much fuel (by mass) you need relative to hardwood pellet to produce the same amount of heat. Lower is more efficient.
Based on published calorific values. Actual values vary by batch and testing method.What this means: To produce the same heat output as 1 tonne of hardwood pellet, you would need approximately 1.5 tonnes of rice husk pellet. The higher the mass required, the higher the handling, transport, and storage volume per unit of heat.
What Each Fuel Means in Practice
These are the characteristics most relevant to industrial boiler operations, based on published fuel specifications.
Hardwood Pellet
Our productHigh energy density. Very low ash content. Renewable biomass with documented supply chain.
Rice Husk Pellet
Lower energy density means more mass required per unit of heat. High ash (15–20%) increases cleaning frequency significantly.
Coal
High energy density but non-renewable. High sulfur and ash emissions. Subject to growing carbon tax and ESG scrutiny.
LPG / Diesel
Cleanest combustion and lowest ash, but fossil-based and typically the highest fuel cost per unit of heat. Subject to oil price volatility.
Still Comparing?
The charts above use published calorific values and typical ash content ranges. Your actual numbers depend on the specific batch, your boiler efficiency, and current market prices for each fuel in your region. If you want to work through the comparison for your specific consumption volume and current fuel cost, that is a conversation worth having.