Public Health England recommends the following levels:
- 21 degrees C for living areas
- 18 degrees C for bedrooms
- Below 16 degrees C, breathing may be affected
- At 12 degrees C, blood pressure starts to rise
Comfort cannot be defined absolutely, but the World Health Organization's standard for warmth says 18C (64F) is suitable for healthy people who are appropriately dressed. For those with respiratory problems or allergies, they recommend a minimum of 16C (60.8C); and for the sick, disabled, very old or very young, a minimum of 20C (68F).
**********
Living room temperatures
- 18 to 21 C = comfortable temperature
- 9 to 12 C or 24+ C = risk of stroke and heart attack
- 21 to 24 C or 16 to 18 C = some discomfort
- 12 to 16 C risk of respiratory disease
- Less than 9 C = risk of hypothermia
