Can I claim buying and installing a split system AC for my home based clinic as an instant asset write off?

I have a home based clinic in a detached room from my home which needs an AC for hot days. I just wanted to confirm if I can claim the cost of installing an AC as an instant write for this tax year. I both own and live in my property as well if that info helps.

Would I also be able to claim a massage table as well as an instant write off?

TIA