Mini split system

Hello all,

Thank you for any help and/or advice, I am a novice to HVAC.
I am purchasing a 2300 sq ft home that was built in the 70's. It has a mini-split system with this tiny ports going into each room. There is an outdated 20 year old heat pump providing the cooling for the mini split (I think). The owner says this is only for cooling, as she plugs up the ports during winter.

The ceilings have electric radiant heat.

My initial plan was to install natural gas in the house, and get a goodman package, like in the link below.

https://www.nationalairwarehouse.com/wholesale-air-conditioners/gas-electric-split-systems/4-ton-goodman-16-seer-r-410a-80-afue-80-000-btu-two-stage-vertical-gas-furnace-split-system.html

Question is: is a furnace even possible to tie in with the mini split ports? The goal is to change the homes dryer, water heater, furnace, stove, and BBQ grill line over to natural gas. I would stop using the radiant electric systems completely and just blow both hot and cold air through the duct system.

Thanks for all input, suggestions, and slaps in the face.

submitted by /u/Revolv0
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