Hot Water Heat Pumps
Case Studies
Gas hot water replacement saving Christchurch home $972 per year
Ecobulb replaced the gas hot water heater for a Christchurch family of four with an Emerald heat pump water heater. They are saving an estimated $972 per year on their hot water heating costs through the ultra-high efficiency of their Emerald heat pump water heater, combined with its smart controls that allow the savings to be maximised and monitored in real time.
Christchurch electric upgrade saving $800 a year
"Just sending you an email to follow up on the Emerald HWHP installation today. Firstly, thank you, great to have the unit installed. Overall a great experience with the plumber and electrician, everything working, the unit is impressively quiet, super low electricity use and everything was going in time for the kids to have a hot bath this evening".
Wellington piped gas upgrade saving $1,200 a year
Our partners OVP Plumbing and Gas upgraded this home from piped gas to an Emerald Hot Water Heat Pump. It sits perfectly into a key area of the property and will help this family save $1,200 a year.
A Queenstown couple recently needed to replace their ageing electric storage cylinder.
Instead of opting for a like-for-like replacement, they chose to upgrade to an Emerald Pro hot water heat pump.
The result? Increased storage space in their home and annual savings of approximately $330 compared to a standard replacement.
The installation process exceeded expectations, with the homeowner commenting:
“Great installation yesterday. Really happy with that. Very thorough.”
Queenstown couple savings $330 a year
Installed by Laser Plumbing, this home made the switch from gas to an Emerald Heat Pump Water Heater – cutting energy use and reducing hot water costs.
Blenheim hot water upgrade
Installed by our partners at Aquapro, this Christchurch home upgraded from gas bottles to an Emerald Hot Water Heat Pump and will save around $700 a year from their hot water bills.
Haswell home saving $700 per year
Installed by our partners at Aquapro, this Christchurch home upgraded from an electric hot water cylinder to an Emerald Hot Water Heat Pump and will save around $330 a year on their hot water bills.
Hornby home saving $330 per year
Installed by our partners at Aquapro, this Christchurch home upgraded from gas hot water to an Emerald Hot Water Heat Pump and will save around $1,400 a year on their hot water bills.
Halswell home saving $1,400 annually
Cashmere, Christchurch – gas hot water replacement
A homeowner in Cashmere upgraded from an ageing gas hot water system to an Emerald Heat Pump Water Heater to reduce ongoing energy costs and future-proof their home against rising gas prices.
The new system now provides reliable, energy-efficient hot water with significantly lower running costs, quieter operation, and no need for gas supply or bottle deliveries.
Lincoln, Christchurch – mains pressure electric cylinder replacement
An older mains pressure electric hot water cylinder in Lincoln was replaced with an Emerald Heat Pump Water Heater to improve efficiency and lower power bills.
Estimated annual savings: $730 per year
The homeowner now benefits from fast-recovery hot water, quieter operation, and significantly reduced electricity usage.
Parklands, Christchurch – low-pressure electric cylinder replacement
A homeowner in Parklands replaced an older low pressure electric hot water cylinder with an Emerald Heat Pump Water Heater to modernise their hot water system and reduce energy costs.
Estimated annual savings: $360 per year
The upgrade also improved hot water pressure and overall household efficiency.
Hei Hei, Christchurch – low pressure electric cylinder replacement + whole home water filter
A homeowner in Hei Hei upgraded from an older low pressure electric hot water cylinder to an Emerald Heat Pump Water Heater.
As part of the project, a whole-home water filtration system was also installed to improve water quality throughout the property.
Estimated annual savings: $550 per year
The result is cleaner water, improved efficiency, and significantly lower hot water running costs.
Auckland home upgrades from gas to Emerald Heat Pump Water Heater
Auckland home upgrades from gas to Emerald Heat Pump Water Heater
This Auckland homeowner replaced their existing gas hot water system with an Emerald Heat Pump Water Heater to reduce household energy costs and improve efficiency.
Installed by Laser Plumbing & Electrical, the new system is expected to save approximately $1,450 per year in hot water energy costs compared with the previous gas setup.
Upper Hutt – Gas Hot Water Replacement
This Upper Hutt homeowner replaced an older gas hot water system with an Emerald Heat Pump Water Heater to reduce energy costs and improve efficiency.
Estimated annual savings: $1,944 per year
Upper Hutt – Electric Cylinder Replacement
This Upper Hutt homeowner upgraded from an older electric hot water cylinder to an Emerald Heat Pump Water Heater for improved efficiency and lower running costs.
Estimated annual savings: $359 per year
This home near Queenstown, upgraded from gas hot water to an Emerald Hot Water Heat Pump and will save around $870 a year from their hot water bills.
Kingston home now saving $870 per year on hot water bills
Christchurch gas upgrade saving $1,100 a year
This family upgraded from gas bottles to an Emerald Hot Water Heat Pump, saving around $1,100 a year on their hot water bills. Tucked neatly on a concrete paving slab, this install shows that most homes can easily find a spot outside for a heat pump system.
Installed by our partners at Aquapro, this Christchurch home upgraded from gas bottles to an Emerald Hot Water Heat Pump and will save around $900 a year from their hot water bills.
Christchurch gas upgrade saving $900 a year
Sumner, Christchurch, gas hot water replacement saving $880 per year
Installed by our partners at Aquapro, this Christchurch home upgraded from gas bottles to an Emerald Hot Water Heat Pump and will save around $880 a year from their hot water bills.
An electric hot water cylinder replacement, resulting in annual savings of $660.
Kaiapoi home saving $660 per year
After upgrading their electric hot water cylinder to an Emerald hot water heat pump, this family are saving $840 per year.
Rangiora home saving $840 per year
Installed by our partners at Aquapro, this Christchurch home upgraded from gas bottles to an Emerald Hot Water Heat Pump and will save around $1,170 a year from their hot water bills.
Kaiapoi home saving $1,170 per year after gas hot water replacement
Christchurch home saving $1,185 per year on their hot water costs
Ecobulb replaced the gas hot water heater for a Christchurch family of four with one of their heat pump water heaters. Despite having four heavy hot water users and programming their heat pump water heater to run just seven hours per day to maximise their savings, they never run out of hot water and are saving $1,185 per year on their hot water costs.
Lincoln, Christchurch – old gas hot water system replacement
This Lincoln homeowner replaced an older gas hot water system with an Emerald Heat Pump Water Heater to improve efficiency and reduce household energy costs.
Estimated annual savings: $515 per year
The upgrade delivers lower running costs, reduced carbon emissions, and more efficient hot water heating for the household.
Wigram, Christchurch – mains pressure electric cylinder replacement
This Wigram property upgraded from a traditional mains pressure electric hot water cylinder to an Emerald Heat Pump Water Heater.
The new system provides improved energy efficiency, lower ongoing power consumption, and reliable hot water performance for the whole household.
Northwood, Christchurch – mains pressure electric cylinder replacement
This Northwood installation involved replacing an ageing mains pressure electric cylinder with an Emerald Heat Pump Water Heater.
Estimated annual savings: $730 per year
The homeowner now enjoys lower electricity bills, reliable hot water, and one of the most energy-efficient hot water systems available in New Zealand.
Wigram, Christchurch – gas hot water replacement
This Wigram homeowner replaced their gas hot water system with an Emerald Heat Pump Water Heater to reduce energy costs and eliminate reliance on gas.
Estimated annual savings: $970 per year
The Emerald system now delivers highly efficient hot water heating with lower emissions, quieter operation, and substantial long-term savings.
Emergency heat pump installation in Christchurch
On Monday this Bromley, Christchurch customer called about their failed electric hot water cylinder – and on Tuesday our partner Aquapro installed a brand new Emerald heat pump water heater in their home
Porirua – Electric Cylinder Replacement
An older electric hot water cylinder was replaced with an Emerald Heat Pump Water Heater, helping this Porirua household significantly reduce hot water heating costs.
Estimated annual savings: $1,100 per year
Tawa – Gas Hot Water Replacement
An ageing gas hot water system was replaced with an Emerald Heat Pump Water Heater, helping this Tawa household reduce energy consumption and ongoing costs.
Estimated annual savings: $1,555 per year