... Compact design 4. R22, R410a,R407c,R134a Heat pump heat exchangers are made of top quality titanium pipes ... They are suited to the use by swimming pool, seafood markets, and electroplating, chemical and medical ... -R, stainless steelExcellent PVC plasticCompact design with high heat transfer ability.Suitable for R22, R134a, R410a,, R407cWorking ... water/antifreeze 10.5kw Spa pool heat pump heat exchanger