Matthew Mallett Photography image of north wall clad in recycled steel roofing

September comfort and cost report

As the days and nights become warmer, less mechanical heating is required to assist passive solar heating (plus insulation) to maintain a comfortable temperature indoors. Increased solar power exports and decreased grid imports reduced the energy bill to 50c per day.

Miglas Windows image of curved window wall for August report

August comfort and cost report

In August, our high performance home maintained a comfortable indoor temperature within the target range of 18 to 21oC. The month’s energy bill was $47 or approximately $1.50 per day, ...

North facing living area windows for July report

July comfort and cost report

Analysing the temperature monitoring and electricity consumption data for July is an opportunity to review the comfort and cost of living in a passive solar, all-electric home.

Thermal mass in living room heated by sunlight

Living with thermal mass

Learning how to help the passive solar design features keep us warm in Winter is a useful exercise. Sunlight is all we need on clear, cold days. When it's cloudy, we use the heat pump to stop the concrete slab thermal mass cooling too much.

Passive solar and Passive House are different

Passive solar and Passivhaus

While discussing sustainable home design with others, I realised the word "passive" mu;st be used carefully. Passive solar design is different to Passive House design. It's important to understand the differences and similarities.

Outdoor and indoor temperature graph

Testing outdoor versus indoor temperature

While the indoor temperature felt comfortable during hot summer days, I was left with the nagging feeling that wishful thinking was keeping me cool. Passive solar design should minimise the need for mechanical cooling for everything but a run of very hot days. Temperature monitoring data confirmed this is the case for our design.

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