AirCal Crystal Inverter swimming pool heater used the similar principle as reverse cycle air conditioners.

pool heater
Talent Air swimming pool heater
56KW air
Super air 56KW Air Source Swimming Heat Pump Pool Heater
victory inverter 150
Victory inverter 150 Swimming pool heat pump
vigor 210
Vigor 210 WIFI ON-OFF Pool Heat pump for Swimming pool

Aircal King Heat Series DC Inverter Heat Pumps utilize advanced heat pump technology to achieve high efficiency.

evi 80kw king
EVI 80KW King Heat DC Inverter Multifuctional Heat Pump
12kw multifuntional dc inverter
6-9kw DC Inverter Heat Pump water to heater
18kw dc inverter
18KW DC Inverter EVI Multifuctional Heat Pump
40 kw dc inverter
40KW Dc Inverter EVI Heat Pump for Low temperature -25 degree

The Double energy System by air-water technology and smart electric water integrated technology, to achieve a short period of time.

200L heat pump
All in one 200L WIFI Hot Water heat pump for home use
100L heat pump
100L All In One Heat Pump Water Heater provide hot water
200L heat pump
All in one 200L WIFI Hot Water heat pump for home use
100L heat pump
100L All In One Heat Pump Water Heater provide hot water