Heat Pumps

I know this is not directly Thailand related as there is little need for heat pumps,

reversible air-conditioners, except in the northern provinces.

I live in a Mediterranean climate, where temperatures drop to 2-3 C,

so I am looking at fitting a reversible air-conditioner to keep me cool in summer

and warm in winter.

The figures look good. 2kW of electricity can produce 5kW of heat in winter.

I am particularly looking for info on reliable, energy efficient models.

I need two, 9000BTU and 18000BTU

Thanks