HVAC vs Mini Split Systems

[Sunil Kumar]

I just bought a 65 year old single family house. It has 2 wall heaters - one in the 1st floor and 1 in the 2nd floor. No ducts for central A/C and heat.  As installing ducts and central HVAC can be expensive,I am considering installing mini Split Systems in the 5 bedrooms. But I hear that being electric these can be very expensive to operate as electricity is expensive. What is your experience with these? appreciate your feedback.