By PJ Timmins, The Alternative Board Ireland
When I first met Bill Quigley, Managing Director of NZEB Technologies (now rebranded as GreenRefits.ie), I was struck not just by his deep technical skill, but by his humility and long-term vision. For nearly 40 years, Bill and his team have been designing and installing advanced solar energy systems, long before the “green retrofit” concept became commonplace.
But technical mastery alone wasn’t enough. Their challenge was making that expertise understandable and compelling to homeowners, architects, and the retrofit trade. That’s where TAB entered the picture.
Thinking Differently with TAB
As a TAB member, Bill gained a space to see the business from a broader angle. We worked on clarifying the message: What’s the real value? How do you explain it simply? How do you structure for scale? Those conversations were critical, helping shift the mindset from “we engineer green systems” to “we transform homes for comfort and efficiency.”
Out of that came their new consumer-facing brand: GreenRefits.ie. The name captures the mission—“green refits” is both descriptive and memorable. It resonates with homeowners while retaining credibility in the professional circles of installers and engineers.
The “No Move-Out Deep Retrofit” That Changed My Home
One of the most radical, homeowner‑friendly innovations from GreenRefits is their “No Move-Out Deep Retrofit” approach. Instead of forcing residents to vacate during major works, the methodology is designed so your home can be sealed, ventilated mechanically, and fully reworked while you still live in it. It’s a huge advantage in terms of cost, disruption, and peace of mind.
I was so impressed by what I witnessed and learned that I adopted GreenRefits’ principles when remodelling my own home. The result has been astonishing: a home that maintains a constant, comfortable temperature year-round. The radiators rarely come on. Summer is cool, winter is warm. Honestly, I check the weather apps and step outside to feel the seasons now because inside feels so steady.
In our case, the roof geometry wasn’t ideal for panels, but GreenRefits identified an overgrown area behind the house that was underutilised—and that’s now where our solar array sits. Combined with a battery and AI-powered system, we optimise energy usage and even sell back to the grid when surplus is available.
See It in Action: My Home Case Study
If you’d like a deeper dive into exactly how this transformation worked for my house—from a BER rating of E1 to C1, and aiming for B2—check out the full case study here:
Transforming a Home from E1 to C1 — and Soon to B2 Green Refits
That page details the steps taken, the technologies used, and the comfort and efficiency gains we’ve experienced already.
Expertise, Passion, and Real-World Results
What sets Bill and his colleague Mark apart is not just their engineering acumen, but their deep commitment. They don’t just build systems—they teach, enable, and collaborate with the trade community. Their aim now is to empower top-tier installers, architects, designers, to understand and adopt this next level of retrofit, with superior ROI compared to many of the popular (but often disruptive) approaches out there.
Because the truth is: a retrofit that’s expensive, inconvenient, or confusing will stall. But one that’s elegant, clear, and high-performing? That’s the future.
What It Means for Homeowners and Trade Partners
- Homeowners get better comfort, lower energy use, and minimal disruption.
- Trade professionals gain access to proven systems and methodologies that differentiate them in a competitive field.
- Investors and policymakers see a path for retrofits that are economically viable, scalable, and genuinely sustainable.
Final Thoughts
GreenRefits is more than a rebrand—it’s a rethinking. The GreenRefits approach represents a smarter way to retrofit: elegant, efficient, and people-first. Bill Quigley has always been ahead of his time. Now, thanks to his work with TAB and the new branding, his vision is primed to reach a much broader audience.
And as someone who’s experienced it firsthand in my own home—this is more than theory. This is how the future of sustainable living works.
Learn more about GreenRefits.ie
Visit: www.greenrefits.ie
About TAB
Curious how TAB can help your business think differently and scale meaningfully? Let’s talk: