Getting heating right

Furthermore there is apparently a theoretical calculator based sqm, location etc to give a minimum kilowatt output for your heating source. The outcome of this assessment on my properties is supposedly the existing heat pumps are under capacity and can’t be topped up with a secondary heat source so I am required to install a second heatpump in the same room. Both of the rooms assessed aren’t large (less than 15m2) both are modern and insulated and have heat pumps that professionals recommended adequate to heat that area and now I have to spend another $4k at each location to install a second heatpump when the first was more than adequate. Not sure how it has come to this. Surely this needs reviewing to at least test existing heating can heat a room to 18 degrees rather than a rely on a calculator.

For these sort of applications the online calculators are very conservative, and have many worst case assumptions. Usually we would do an onsite trial early on a cool morning, measure the rate at which the room warms and the temperature achieved. This can be used as evidence of compliance later and might save you $8k ! MR (mechanical Engineer)

A few lines out of documents on the Tenancy Services website that may assist with your dilemma I have an undersized heater, can I top up with an electric heater? A landlord may be able to install an electric heater to make up the difference between the required heating capacity and an existing undersized heater(s). An undersized heater(s) can be topped up by an electric heater of up to 1.5 kilowatts. However, this can only be done where the required heating capacity for the main living room is more than 2.4 kilowatts and the existing heating device(s) were installed before 1 July 2019. What if I have already installed a heater in the living room? A landlord will need to determine whether the current heating device is an acceptable device and if the heating device will be able to heat the main living room to 18˚C. Landlords can use the online heating tool to determine the kilowatts required to heat the main living room to 18˚C. If a landlord has installed a heating device before 1 July 2019 and the heating output is within 10% of the kilowatts required to heat the main living room, that heating device will meet the standard.