Run a Quick Estimate
Fill the inputs and calculate the full timeline.
Inputs
This tool estimates warm-up time plus a conservative hold time. Real outcomes depend on airflow, cold spots, and sensor placement.
Safety note: Avoid overheating electronics, aerosols, plants, and pressurized containers. Follow local safety guidance and use professional equipment when possible.
Example Data Table
These are sample scenarios to help you sanity-check inputs.
| Scenario | Room (m) | Start (°C) | Target (°C) | Heater (kW) | Insulation | Load | Estimated total time |
|---|---|---|---|---|---|---|---|
| Small shed | 3 × 2 × 2.4 | 18 | 50 | 6 | Average | Light | ~3–5 hr |
| Bedroom | 4 × 3 × 2.6 | 20 | 52 | 9 | Average | Medium | ~4–7 hr |
| Packed storage | 6 × 4 × 2.8 | 15 | 54 | 18 | Poor | Heavy | ~6–10 hr |
Formula Used
The calculator estimates the time to raise air, contents, and structure from the starting temperature to the target temperature, then adds a conservative hold time.
Heat load (kJ) ≈ (m_air·Cp_air·ΔT + m_contents·Cp_contents·ΔT + m_structure·Cp_structure·ΔT) · LossFactor
Effective power (kW) ≈ Heater_kW · Efficiency · FanFactor
Heat‑up time (hours) ≈ HeatLoad_kJ ÷ EffectivePower_kW ÷ 3600 · (1 + SafetyMargin)
Total time ≈ Heat‑up time + Hold time + Buffer
Effective power (kW) ≈ Heater_kW · Efficiency · FanFactor
Heat‑up time (hours) ≈ HeatLoad_kJ ÷ EffectivePower_kW ÷ 3600 · (1 + SafetyMargin)
Total time ≈ Heat‑up time + Hold time + Buffer
- LossFactor increases time for drafts and heat loss.
- Contents load estimates how much material must be heated.
- Hold time depends on the chosen target temperature.
How to Use This Calculator
- Measure the space length, width, and height.
- Enter the starting temperature and your target temperature.
- Add the combined heater output and select insulation level.
- Choose contents load and enable air circulation when possible.
- Set a safety margin, then calculate the estimated timeline.
- During treatment, monitor the coolest spots with probes.
- Keep the target temperature for at least the hold time shown.
- Download CSV or PDF for your records and comparisons.
© 2026 Bed Bug Heat Time Calculator. Use estimates responsibly.