When we talk about making a home more energy efficient, insulation and heating often steal the spotlight. But lighting – specifically natural lighting – is one of the most overlooked opportunities for both energy savings and comfort. That’s where Suntrenz comes in, with their range of Suntubes and VELUX skylights designed to transform the way your home feels and functions.
A sun tube (also known as a tubular skylight) is a clever daylighting system that funnels sunlight from your roof into internal spaces like hallways, bathrooms, or wardrobes – all without the need for electricity during daylight hours.
At ceiling level, each Suntrenz Sun Tube features a double-layer PMMA diffuser with a sealed air gap – effectively acting like double glazing. This reduces heat loss where it matters most and ensures your home stays warmer in winter and cooler in summer. In fact, Suntubes can achieve up to R 1.40, putting them on par with many double-glazed windows – View the Thermal Performance Analysis of a Suntrenz Suntube
For homeowners looking to go a step further, additional glazing panels can be added inside the tube to increase insulation even more.
But beyond the technical specs, the real value of a sun tube lies in its everyday impact. Take a hallway that typically runs a 75-watt bulb for most of the day – that’s around $180 per year in electricity. By replacing that artificial lighting with free daylight, a sun tube not only cuts your power bill, but can also reduce the daytime demand if you’re on solar PV systems. That means more of your solar energy can go towards other essentials – improving overall energy efficiency and making your solar investment work even harder.
On the skylight front, Suntrenz works with VELUX, a trusted name in natural lighting and ventilation. Most VELUX skylights installed in New Zealand homes are double glazed as standard, and triple-glazed options are available for even greater thermal performance. With low-E coatings and argon gas between the panes, they’re built with energy efficiency in mind.
Many VELUX models also offer solar-powered or electric opening options, allowing for natural ventilation without needing to power fans or air conditioning. That means less reliance on mechanical cooling, and a healthier indoor environment overall.
While the numbers are important, they don’t tell the whole story. What truly sways most homeowners isn’t the savings on their power bill – it’s how these installations make a space feel.
Natural light has a powerful psychological effect. It opens up rooms, boosts mood, and creates a sense of wellbeing that artificial lighting just can’t match. As one Suntrenz installer puts it,
“It feels more open, more alive – and people genuinely feel happier in the space. That’s the part that sticks.”
