The Dream class of monobloc heat pumps

One species of http://wiki.diyfaq.org.uk/index.php/Heat_Pumps

These are purchaseable by non-professionals so are useable for DIY projects. Most professional installers would not use them. They are a chinese import offered on ebay.

They come in four types: air-to-water or ground-to-water, either for domestic or swimming pool heating.

The domestic ASHP has inch male BSP threads for water in-out pipes. It needs a dedicated 240 volt supply from a circuit-breaker in your electric consumer unit runiing to an isolation switch near the unit. It has no pump. It has a key-pad to change seasonal settings but no useable controls except the run-standby button. You can't control the unit from inside the house, so no programmer or thermostat.