Propane Heat Pumps
https://streckverband.wixsite.com/thebuzzingfeeds/post/propane-heat-pumps-11-things-you-need-to-know-before-you-buy-the-wrong-system
{Refra develops efficient propane-based heat pumps for industrial and commercial projects requiring reliable thermal solutions. As an experienced European manufacturer, the company specialises in safe refrigerant solutions engineered for regulatory compliance, supplying R290 heat pumps, R290 chillers and advanced refrigeration equipment to customers worldwide.