If you have common hot water for your apartment block it can be powered a number of different ways.
Cogeneration systems are rated the most efficient central hot water systems to install. After this gas-boosted solar, heat pump systems, electric-boosted solar and then gas.
It is a major infrastructure project to change your common hot water system type after the property developer has installed it.
At Freesia Gardens, we investigated changing our system from gas with 3 storage tanks to solar + gas.
Unfortunately, the new piping to get the water from the ground floor up to the roof, 7 storeys above to run it through a new solar system on the roof was not feasible. This also would have added additional water pumping costs to our energy bill.
Instead, we are going to invest in a new roof to put over out outdoor boilers to extend their life. With each of the 3 boilers costing $11k to replace it is an important piece of infrastructure which we need to protect.
The problem we face is rising gas prices in the state of NSW.
Wattblock assists strata buildings reduce energy costs by up to 80%