Decarbonize efficiently with a heat pump without replacing your existing installations.

The integration of heat pumps (HP) into existing buildings involves potentially major technical transformations. In addition, this transition often uses the new heat pumps at high temperatures (55... 60°C), which reduces their performances.

The Heat 4T° solution simplifies and optimizes the installation of a heat pump.

No modifications to existing hot/cold water systems

Efficiency of the new heat pumps improved by 30% by operating at low temperatures (~ 40°C) throughout the winter

Simple - Innovative - Effective

Heat 4T° is a patented control switching system that allows the entire existing chilled water distribution network and its terminal units to be used as a low-temperature heating network.

To improve your building, all you have to do now is :

Replace your chiller with a reversible hot/cold model

Equip your HVAC terminal units with the Heat 4T° solution

You get a hybrid building, which can be heated both via the new heat pump and by the conventional boilers that have been retained (in case of heat pump fail or periods of extreme cold)

The Heat 4T° solution facilitates greatly the integration of heat pumps into existing buildings while operating them in optimal conditions temperature and efficiency.

How does it work ?

SUMMER

the new reversible heat pump operates in "cold" mode

the Heat 4T° is inactive

= conventional operation of the installations: cooling of the premises with the chilled water network and the terminal units (fan coils, chilled beams, etc.)

MID-SEASON & WINTER

The new reversible machine switches to the "heating" mode

Heat 4T° detects the “hot” working mode of the HP and activates the switching of the necessary terminal controls

= use of the chilled water network and the cold coils of the terminal units as a low-temperature heating network (~ 40°C) via the heat pump

EXTREME COLD or MACHINE BREAKDOWN

if the external conditions are no longer favorable for the proper functioning of the heat pump = the machine stops

Heat 4T° goes back to inactive mode

= return to conventional heating via boilers and the high-temperature hot distribution network

Choose a more efficient operation at low temperatures

example of efficiency improvement (heat pump 300/230 kW – R32)

		Machine performance factor (COP)
T° outs.	use rate	Heat 4T° : HP at 42°C	classical solution: HP at 55°C	gain with Heat 4T°
~ +10°C	25%	4,76	3,43	+39 %
~ +5°C	50%	3,81	2,84	+34 %
~ +0°C	75%	2,54	2,00	+ 27 %
< 0°C	max	2,44	1,94	+26 %