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Headshot of Joanna O'Loan, Knowledge Manager at Energy Saving Trust

Joanna O’Loan

Knowledge Manager

Since 2019, I’ve been helping people understand and adopt energy efficiency and zero-carbon technologies through research, analysis, writing, training, and advice at Energy Saving Trust. I’m especially excited about the opportunities net zero brings to improve our homes, not just in terms of carbon, but in comfort, health, and quality of life.

My background is in chemical engineering and with a lifelong curiosity about how things work, I’m passionate about making complex topics accessible.

I enjoy being outdoors – whether it’s Munro bagging, forest and coastal walks, or just enjoying a coffee al fresco – and practicing yoga.

Areas of expertise

  • Making homes zero carbon – from heat pumps and electric heating to solar panels
  • Everyday energy use – helping people understand how their appliances and habits affect energy bills
  • Warm, energy-efficient homes – advice on insulation and ways to make homes more comfortable and efficient
  • Media spokesperson

 

Articles by Joanna O’Loan

How our experts save energy in the kitchen

6 October 2026

Here are our five energy saving cooking tips to help you save and money in the kitchen.

Top tips to save energy and money in the bathroom

6 October 2026

Saving water can not only reduce your water bill (if you’re on a water meter), but it can also reduce your energy…

How to save energy if you’re renting (according to our experts)

6 October 2026

Here are some quick free and low-cost energy saving tips for renters to cut their energy bills without needing landlord permission.

Five things you should do to prepare your home for winter

6 October 2026

It might still be summer, but you can still prepare your home for winter by reducing reduce heat loss around your home.

Top energy saving upgrades to make if you’re renovating your home

6 October 2026

Already having some work done? Save yourself some money and limit any disruption by installing these energy efficient home improvements too.

Retrofit explained

6 October 2026

We talk about what the term ‘retrofit’ means, why UK homes need it and how you can start your retrofit journey.