Air con units

I agree with previous person, change your units only when you have to. Ours are in 19 years. I changed one recently During the winter, It’s not cold during the day in Spain, only gets cold when the sun goes down. We turn ours on early before the room gets cold and find it very cosy. On occasion we subside it with an oil heater. I wouldn’t care what it cost to run the aircon in the summer as it makes my life bearable! When you consider what we spend at home on oil fired central heating and compare it to the amount it costs to use the inverter, it’s a no brainier. No tumble drier bills either. If you find it difficult to hear your lounge in the wintertime,check for draughts and install double glazing if necessary. Keep doors in the house/ apartment closed, have an electric blanket on your bed and install a tv in the room. Go to bed early and enjoy a movie or whatever you fancy. Put rugs onto the floors, a wall heater in the bathrooms. Use them sensibly but don’t do without heat or you’ll end up ill. I keep hats, scarves, coats and a umbrella for the odd occasions that they are necessary. The climate in Spain is usually wonderful but it has its moments ! Invest in decent slippers as tiles are cold in the winter. Oh, dressing gowns too.
Some people keep a good wool rug to put over their legs. Same as people always did years ago. Also, if planning to spend winter months in Spain, invest in pure wool/ cashmere sweaters. You’ll never be warm in acrylic!
I can’t believe we bought our house 20 years ago when I was only 52. We love it even more today as there are some wonderful restaurants and shops close by. No need for taxis at night.
Invest in internet and Netflix/ Amazon. Perfect for winter months.
I hope you have many years to enjoy your place. Sincere good wishes Rosemary.