GST classification for HVAC works contracts requires supply as works contract with applicable GST and ITC blocked.
Contracts for supply, installation and commissioning of HVAC as an integrated unit constitute a works contract under the CGST Act definition and are classifiable under the HSN framework for construction-related services, attracting the applicable GST rate; input tax credit for such construction-related HVAC services may be ineligible under the statute's blocked credit provisions, as noted in administrative guidance. (AI Summary)
gst on hvac construction contract
Goods and Services Tax - GST