Heating Installation
What would you ask before approving heating installation work in Perth?
Asked by Logan Millerin Perth, Western Australia· 3/29/2026· 1880 views
I'm in Perth, Western Australia and dealing with a 18-year-old new heating system in our small commercial unit. Over the last three days, it has been coming in with wildly different replacement recommendations and we're now noticing the upstairs stays noticeably worse than the main floor.
One contractor quoted A$280 for repair, while another jumped straight to a A$8,899 replacement because of the age. The weather here has been dealing us hot afternoon cooling demand, so I do not want to wait too long, but I also do not want to approve the wrong scope.
If you were comparing bids on this, what would you want checked first? I especially want to know how much weight you would give to load calculation, venting requirements, duct sizing, and equipment staging.
replacementquotessizing
3 Answers
34
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If this landed on my schedule, I would want to document the core readings first and then explain exactly why the repair does or does not make economic sense. For a new heating system that is coming in with wildly different replacement recommendations, the first things I would ask for are load calculation, venting requirements, duct sizing, and equipment staging. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Perth, Western Australia, pricing can move around, but the diagnostic process should still be clear.
18
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If you can, ask whether they checked airflow before recommending equipment. We nearly replaced a system when the bigger issue was elsewhere. We had a related issue with our new heating system in Perth. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Benjamin Mitchell·3/29/2026
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We had something similar and the turning point was asking each company for the actual readings in writing instead of a verbal explanation. We had a related issue with our new heating system in Perth. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Logan Miller·3/29/2026