Space saving design

System divider with heat exchanger

Flexible shunt unit for heating or cooling

TTM Shuntopac® 20-200 VÅV

Shunt unit for combined shunt units

TTM Shuntopac® 20-200 VÅV is a combined shunt unit for both heat recovery and heating to a ventilation system.

The heat exchanger in the supply air is used to transfer heat both from the exhaust air and the heating primary side circuit. The traditional heat exchanger is removed as heat is transferred via a plate exchanger in the shunt unit’s supply air circuit.

TTM Shuntopac® 20-200 VÅV is supplied in dimensions DN 20 up to DN 200 with each circuit adapted for the current flow.

TTM Shuntopac® 20-200 VÅV is supplied with a fire and corrosion-proof housing in aluzinc sheet. Standard insulation is AF/Armaflex AF-4. The shunt unit has a stand with two legs and foot plates for floor set-up and attachment.

The standard version pipe package consists of fully-welded pressure vessel pipe SS-EN 10216-2, rustproofed with grey primer. Pipe packages in other qualities or with another surface treatment can be supplied to order.

The shunt unit is environmentally approved.


1. Control valve
2 pcs seat valves in a choice of make and type.

2. Adjustment valves
3 pcs in a choice of make. Make TA STAD/F supplied as standard. Installed on pipe package with conical coupling or flange. Can also be supplied with dynamic adjustment valves, flow regulators or differential pressure regulator.

3. Shut-off valves
3 pcs ball valve DN 20-50 with full throughflow and extended stem or 3 pcs butterfly valve DN 65-200. Designed to act as end valves if the shunt unit is removed from the system. Installed on pipe package with conical coupling or flange.

4. Pumps
Choice of make and type with “wet” or “dry” motor.

5. Plate heat exchanger
Welded, choice of make and type. Make: Swep supplied as standard. The heat exchanger is positioned on the front of the unit group to facilitate service. Other
positioning is available on request, provided the heat exchanger’s size and configuration permits it.

6. Non-return valve
1 pc with sprung disc.

7. Drain plug
Version with hose screw connection.

8. Thermometers
6 pcs, graduated -40 – +40 °C or 0-120 °C.
Insulation: AF/Armaflex AF-4.

9. Connection R 1/2” for frost protection sensor
on heat exchanger.

10. Vacuum and safety valve

Dimensions TTM Shuntopac®  20-200 VÅV DN20-50

Connection DN2025324050
Weight, approx. kg9095100110180

Dimensions TTM Shuntopac®  20-200 VÅV DN65-100

Connection DN6580100
Weight, approx. kg260340480

TTM Shuntopac® 20-200 VÅV


The heating primary side can be supplied with a choice of shunt connection. The heat exchanger is installed on the front of the shunt unit to facilitate service.

Example of Shuntopac with combined heat recovery and heating function.

Customised design
  • Pipe package in choice of material, e.g. stainless steel, copper etc.
  • Anti-corrosive painted pipe mixing loop, e.g. epoxy enamelled. 

Contact TTM to discuss your requirements.

TTM SHUNTOPAC® Green Line is a category of shunt units equipped with low-lead valves. Green Line is intended for customers with high demands for improved environmental assessments


TTM SHUNTOPAC® Dynamic gives correct regulation even in systems with varying differential pressures or where the differential pressure is unknown.


TTM SHUNTOPAC® EM is a category of shunt units equipped with ultrasound energy metering equipment according to EN 1434 class 2 and MID 2004/22/EC.

Floor stands for shunt units

Robust floor stands with small foot-print made of epoxy-coated RHS tubes 50 × 30 mm.


Simonsland in Borås

When Kanico created a new district in the town of Borås, they chose TTM to supply shunt units for the HVAC systems. The area is called Simonsland and contains 60,000 m2 of buildings.


TTM Energiprodukter was one of the suppliers in the construction of the prestigious Copenhagen Opera House Together with their reseller, the company succeeded in winning the deal and delivering 98 different shunt units.


NCC are building their new head office at Järva Krog in Solna. The new head office has a strategic and easily accessible position adjacent to the E4 motorway.