Heat Pumps Explained: Efficient Hot Water, Heating & the All-Electric Home (Part 1)

Heat Pumps Explained: Efficient Hot Water, Heating & the All-Electric Home (Part 1)

From The Built Environment by Dean Ipaviz

March 3, 2026 · 49 min · Season 1 · Episode 12

About this episode

Dean Ipaviz interviews Tom Stephenson to discuss heat pump technology and its impact on modern electrified homes.

Dean sits down with Tom Stephenson from Stiebel Eltron to unpack heat pump technology and the role it plays in electrifying modern homes. Tom explains how heat pumps work, why they’re significantly more efficient than gas systems, and how pairing them with solar PV changes the way homes consume and store energy. They explore why improving building fabric should come before adding mechanical systems, and how architects, builders and developers are starting to rethink energy systems in residential construction. The conversation explores: How heat pumps work What Coefficient of Performance (COP) means Why heat pumps can produce 3–4x more heat energy than the electricity they use Air-to-air, air-to-water and ground-source heat pumps Why Australia’s plumbing systems have traditionally relied on gas The shift toward all-electric homes Solar PV, thermal storage and hot water as a “thermal battery” Why building fabric and insulation matter before mechanical systems Tom’s own all-electric home and how it performs in practice Links and Resources: Stiebel Eltron Australia: stiebel-eltron.com.au Your Home - Guide to Environmentally Sustainable Homes : yourhome.gov.au Hosted by Dean Ipaviz…

People in this episode

Host: Dean Ipaviz

Guest: Tom Stephenson

Topics covered

  • heat pumps
  • energy efficiency
  • electrification
  • residential construction
  • solar energy

Keywords

  • Coefficient of Performance
  • thermal storage
  • all-electric homes
  • building fabric
  • insulation

Mentioned in this episode

Products: heat pumps, solar PV

Books & works: Your Home - Guide to Environmentally Sustainable Homes

Places: Australia

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