From one reading to a useful pattern
Measure home humidity. Then work out why it changes.
A digital hygrometer measures relative humidity. Place it away from direct heat, sunlight, windows and moisture plumes, record temperature and humidity at consistent times for seven days, and judge the pattern—not one peak.
Free measurement tools
Turn readings into evidence.
01Record humidity for seven days
Keep temperature, relative humidity and room observations together. The log stays in your browser and can be downloaded as CSV.
Check condensation conditions
Compare room temperature and humidity with a measured surface temperature to see how close that surface is to the calculated dew point.
Estimate a dehumidifier capacity band
Use room volume, temperature, measured humidity and moisture load before comparing appliance sizes.
Step 1
Measure humidity correctly
Start with the right instrument, placement and timing so the number describes the room rather than a radiator, window or short-lived moisture plume.
01How to measure humidity at home: a room-by-room method
How to measure and test humidity in a room with a hygrometer, including where to put it, when to take readings and a seven-day logging method.
Best humidity monitor UK: 3 indoor humidity sensors compared
Compare three indoor humidity monitors by stated accuracy, display, logging, CSV export, Bluetooth and remote-access options.
Step 2
Understand the pattern
Read relative humidity alongside temperature, cold surfaces, condensation and how long the room takes to recover after cooking, showering or laundry.
01What should humidity be in a UK home? Room-by-room guide
A practical UK guide to normal home humidity, the 30–50% reference range, persistent readings above 60% and room-by-room checks.
Dehumidifier specifications explained: capacity, watts, airflow and noise
Read litres per day, watts, airflow, noise, tank size and operating range correctly before comparing dehumidifiers.
Step 3
Choose a proportionate response
Rule out leaks and building defects, improve source control and ventilation, then compare dehumidifier technology and capacity only when the evidence supports it.
01Desiccant vs compressor dehumidifier: which type suits your room?
Compare desiccant and compressor dehumidifiers by room temperature, electricity use, laundry performance, noise and current model evidence.
What size dehumidifier do I need? 10L, 12L, 20L and 25L explained
Compare 10L, 12L, 20L and 25L dehumidifier classes using room volume, temperature, moisture load, airflow and condition-specific extraction.