Efficient underfloor heating pack. Allows for a comfortable indoor climate, created by low operating temperatures. Includes Grundfos pump pack with thermostatic mixing valve, which regulates water temperature in the heating loops. Programmable thermostat can be controlled using the Purmo app. 22mm Compression Fittings Connections Easy to Install 2 Year Manufacturer's Guarantee (T&Cs Apply) 22mm Compression Fittings Connections Easy to Install 2 Year Manufacturer's Guarantee (T&Cs Apply)