How to Calculate the Right Heater Size for Your Room

As temperatures drop, ensuring your living spaces remain warm and comfortable becomes essential. Selecting the correct heater size is crucial for both energy efficiency and maintaining a cozy environment. This guide will help you calculate the required heating power for your room and recommend suitable Mill heaters available at Solenco.

Understanding Heating Requirements

The amount of heat needed to warm a room depends on several factors, including room size, insulation quality, and the desired temperature increase. A commonly used method to estimate the required heating power is:

Required Power (kW) = Room Volume (m³) × Insulation Factor

• Room Volume (m³) = Length × Width × Height
• Insulation Factor:
  • Poor insulation: 0.035
  • Average insulation: 0.030
  • Good insulation: 0.025

Example: A room measuring 5m × 4m × 2.5m with average insulation would require:

Room Volume = 5 × 4 × 2.5 = 50 m³
Required Power = 50 × 0.030 = 1.5 kW

Mill Heater Sizing Guide

Based on our supplier’s updated recommendations of approximately 100W per m², here’s a selection of Mill heaters suited for various room sizes. These figures align with industry standards and are consistent with what competitors can realistically promise under the same conditions.

• Mill PTC Fan Heater (1800W)
  Compact and powerful, ideal for rooms up to 20 m². Features PTC ceramic heating for fast, safe warmth with active airflow.
• Mill CO1200WIFI3BLACK GEN3 Convection Heater (1200W)
  A silent convection heater suitable for rooms up to 12 m². Ideal for bedrooms or small lounges, with app-based WiFi control.
• Mill Invisible WiFi Panel Heater (1500W)
  Stylish and slim panel heater designed for rooms up to 15 m². Silent operation with smart scheduling via the Mill app.
• Mill 2000W Instant LED Portable Heater
  Portable heater ideal for rooms up to 20 m². Offers instant heat and adjusts down to 1200W when surface temperatures get too high.
• Mill Gentle Air WiFi Oil Filled Radiator (2000W)
  Silent and long-lasting warmth for rooms up to 20 m². App-controlled and designed for energy-efficient heating.

Heater Selection Table

Final Thoughts

Choosing the right heater ensures not only comfort but also energy savings. Use the calculation method above to estimate the kilowatts required for your space and match it with one of our efficient Mill heaters. We’ve based these recommendations on updated international benchmarks, so you can feel confident you're getting the right solution for your home.

Still unsure? Contact our team — we’re happy to help you find the perfect fit.