Helping my friend make another heating and air conditioning decision

Lately my friend has been asking for help on a particular following subject.

The subject being heating and cooling.

The only problem is, I have no clue on anything involving heat and a/c, like literally no clue. So he has been calling asking for my opinion on what heating system and a/c might be best for his property and I don’t easily know what to tell her. I will also hear him mention words like geothermal heat pump, warm water boiler and mini ductless split. But those words don’t really make sense to me, however recently he has been bringing up zoned heating and a/c, despite me telling him that I don’t know myself, he continues to ask for my help. Since I can also tell he is not going to take no for an answer I decided to call and ask the local heating and A/C corporation’s opinion. They simply asked me some questions about his property and budget, and I answered them, trying to imagine what he would want me to say. They recommended a heat pump for her, and after asking some questions and doing research, I realized that the heat pump sounded like an enjoyable idea. With my newfound know-how, I went and I told my friend. Thankfully, he really liked the idea too, and thanked me for my help. Last I heard, he was scheduling an appointment for heat pump installation; then maybe in the future my modern know-how will help me open out a modern heating system and A/C system myself.

HEPA filter