CALCULATORS
For specifying hot water systems
We want to make specifying low carbon sustainable alternatives to gas hot water heating in commercial buildings easier. So we have developed two calculators that help you work out commercial system requirements based on your hot water needs.
Articles On hot water
Replacement options for a diesel boiler or gas boiler.
March 26, 2026
Homeowners across New Zealand – particularly in colder regions, are increasingly searching for alternatives to diesel and gas boilers as fuel prices continue to rise.
Replacing Gas Hot Water with a Heat Pump – Costs, Tips & Plumbers Advice
January 16, 2026
Replacing a gas hot water system (like a califont) with a hot water heat pump is becoming increasingly popular in New Zealand. Rising gas prices,
Why NZ Homes Are Switching to Hot Water Heat Pumps for Energy Efficient Living
September 16, 2025
As households and businesses look for smarter ways to cut energy costs and reduce environmental impact, hot water heat pumps are emerging as one of the most
