Fix the design basis
Request heating and cooling loads tied to the agreed finished specifications. The old appliance's nominal size is not a complete design for the altered building.
Request heat pump repair & installation for a property in Vaughan. Include the equipment, the problem or planned work, and your location so the request can be reviewed.
A heat-pump design can become outdated if the room layout or insulation plan changes after equipment is ordered. Give the designer the planned finished building and identify which improvements will happen later.
Provide current and proposed heating arrangements, planned envelope work, and the construction schedule. Ask how incomplete stages affect commissioning and supplementary heating.

Request heating and cooling loads tied to the agreed finished specifications. The old appliance's nominal size is not a complete design for the altered building.
Identify duct, electrical, drain, and control work shared with other trades. Each contractor's responsibilities and required access should be settled before those areas are finished.
At handover, retain installed models, backup settings, and commissioning findings. Ask which later building or equipment changes would require the design to be revisited.
Compare proposals using the same renovation stage and finished-building assumptions. Confirm how interim operation, supplementary heat, and final commissioning are handled before accepting a single equipment price.
Cold-climate capability does not prove that one model covers every home heating load. Ask how the selected equipment and supplementary heat meet the actual design requirements.
Send the property location, equipment information, and requested work for review.