Results - Indoor environment improvements in the Rotorua NOW Home®

Back to New Homes



Relative humidity affects the comfort and health of the occupants of the house. Humidity levels within a house vary depending on the temperature, but levels between 20–70% relative humidity are generally classed as acceptable.

The average daily humidity level was generally below 70%. However the master bedroom has tended to have a relative humidity in the early mornings of above 70%.  Relative humidity, however, is directly linked to temperature – warm air holds more moisture than cold air, and the cold temperatures in the bedrooms overnight will have led to higher humidity levels.



The World Health Organisation recommends a minimum temperature of 16ºC in bedrooms and 18ºC in living areas for good health.  In the family living areas the Rotorua NOW Home® has had acceptable temperatures in daytimes and evenings, but dropped below 16ºC. for a small proportion of the time. The bedrooms however have been below healthy temperatures over half the time, and have been particularly cold during winter nights.

The recommended range for comfortable living is between 20ºC and 25ºC. This comfort range was only achieved for a small proportion of the time.

Our analysis suggests factors causing these lower-than-expected temperatures were:

  • the covering of the concrete floor, preventing full heat absorption 
  • not using the pellet fire to its best advantage
  • a change in siting the pellet fire to a less optimal position
  • not installing the heat transfer system as recommended


Rotorua NOW Home

Rotorua NOW Home®