Envirotube manifold systems are supplied to suit the application. Low temperature heat pump systems will normally have a circulating pump integral to the system suitable for supporting the Underfloor Heating System without the need for additional pumps. Boilers will require blending valves and circulation pumps on the manifold. To comply with underfloor heating installation standards a “high limit” thermostat must also be fitted. All Envirotube high temperature manifolds include these as standard items.