Understand the distinction
Walls, openings, heating, cooling and ventilation work within one building context. An isolated improvement claim may omit effects elsewhere. A whole-home approach asks how proposed changes interact and what evidence supports the recommendation.
Put it in your home notes
Create a simple list of known building features and systems, leaving uncertain details unconfirmed. Use it to discuss priorities with a suitable assessor. The list organises information; it is not a design specification or permission to alter ventilation, wiring, gas appliances or structural elements.