Kolant heat technologies specialize in heat pumps for house & pool heating/Chilling for many years .Products are well sold to all over the world especially Europe. with 20 years experience in refrigerant industry , our heat pumps are excellent in performance with serious quality grade, and expressly, our price is very competitive because we are manufactory, You are welcome to visit our website ***** which includes our company profiles and products information We use the best components in every heat pumps , SWEP /Titanium heat exchanger , Japanese scroll compressor , Emerson thermal expansion valve , Siemens electronic parts Etc ***** components are tested and inspected carefully before assembly ., such as 72 hours pressurized for heat exchanger and pressure gauge , 3 times gas leakage inspection during the production., water immersed inspection for evaporator etc .Every step of the process on each unit will have 2-3 person checked and marked before packing to ensure quality