THAV/THFV roof terminals

General

EXHAUSTO roof terminal THAV is for air exhausts and THFV is for outdoor air intakes.

The roof terminals are for use where an architecturally attractive and technically sound roof termination is required for duct systems. The roof terminals are easy to mount on different roofing constructions.

The low-noise design makes them particularly suitable for built-up areas with high environmental requirements.

THAV's vertical air exhaust prevents polluted exhaust air from being deposited over surrounding areas or soiling the roof surface.

Technical description

THAV/THFV technical data

Materials
External scroll	Hot-galvanised sheet, black lacquer RAL7021 Available in other RAL colours on extra payment
Insulation	50 mm mineral wool
Internal scroll	Perforated sheet (sound damping)
Support fixture	A mounting fixture for fixing under flashing is available for extra payment Warranty is void If the support fixture is not used in accordance with the instructions.

Flashing
Without flashing	Where roof terminals are supplied unpainted
PERFORM	Standard black PERFORM Grey and red are available as an accessories.
Zinc	Used for mounting under roofing felt

PERFORM tolerates temperatures from -40 °C to 90 °C and is resistant to UV radiation.

THFV

THFV roof terminals are for outdoor air intakes with a round inlet, giving minimal pressure drop. THFV has an integrated bird net.

THAV

The THAV roof terminal is for vertical exhaust and has an integrated damper. A bird net is mounted on top to prevent unwanted objects entering the duct system.

Dimensional drawing

THAV/THFV

Dimensions E, F and G apply only to PERFORM flashing.
With zinc, the flashing is always 100 mm.

PERFORM flashing can cater for +/- 2.5° relative to the given roof pitch.

THAV-THFV-Dimensions-GB

THAV/THFV size	Dimensions				Weight* kg	Max. roof pitch V
THAV/THFV size	C1 Ø mm	C Ø mm	L mm	L1 mm	Weight* kg	Max. roof pitch V
160-600	Ø160	Ø270	600	760	16	30°
160-900	Ø160	Ø270	900	1060	18	45°
160-1200	Ø160	Ø270	1200	1360	21	60°
200-600	Ø200	Ø305	600	785	12	30°
200-900	Ø200	Ø305	900	1085	14	45°
200-1200	Ø200	Ø305	1200	1385	17	60°
250-600	Ø250	Ø375	600	835	14	30°
250-900	Ø250	Ø375	900	1135	19	45°
250-1200	Ø250	Ø375	1200	1435	22	60°
315-600	Ø315	Ø440	600	905	19	30°
315-900	Ø315	Ø440	900	1205	24	45°
315-1200	Ø315	Ø440	1200	1505	29	60°
400-600	dia. 400	Ø510	600	1015	25	30°
400-900	dia. 400	Ø510	900	1315	30	45°
400-1200	dia. 400	Ø510	1200	1615	35	60°
500-900	dia. 500	Ø610	900	1440	35	40°
500-1200	dia. 500	Ø610	1200	1740	42	50°
630-900	Ø630	Ø738	900	1550	56	35°
630-1200	Ø630	Ø738	1200	1850	61	45°

* Weight incl. 30° PERFORM flashing.

Angle V	A	E	F	G
0° < V ≤ 2°	300	100	100	100
2° < V ≤ 60°	250	250	300	250

Sound data

THAV / THFV

THAV / THFV size	Insertion loss dB
THAV / THFV size	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz	8000 Hz
160-600	1	6	22	23	22	12	5
160-900	2	8	23	27	28	17	8
160-1200	4	11	25	28	33	22	10
200-600	3	5	15	25	24	13	5
200-900	5	6	20	29	30	18	7
200-1200	7	11	26	31	34	23	9
250-600	4	7	13	19	12	7	4
250-900	5	9	20	26	18	10	6
250-1200	6	11	25	30	23	13	7
315-600	4	5	11	15	9	4	4
315-900	5	8	15	20	12	5	5
315-1200	7	10	20	25	15	7	6
400-600	2	5	9	11	6	4	3
400-900	2	6	14	20	9	6	5
400-1200	4	7	14	22	11	7	7
500-900	2	3	12	17	8	4	4
500-1200	2	5	14	21	10	6	5
630-900	1	4	12	10	7	5	3
630-1200	1	5	16	12	8	6	3

Pressure drop

THAV/THFV

THAV for exhaust air

THAV tryktab

P_t = total pressure drop
Temperature: t = 20°C
Density ℓ = 1.2 kg/m³

THFV for outdoor air intake

THFV tryktab

P_t = total pressure drop
Temperature: t = 20°C
Density ℓ = 1.2 kg/m³

Throw

THAV throw

The THAV roof terminal has an upward airflow with the throw indicated on the diagram. The throw is the distance from the top of the roof terminal to the point on the centre line where the speed has fallen to 2.0 m/s.

The vertical exhaust also directs noise upwards, thus limiting the sound level in surrounding areas.

THAV kastelængde

Flue gas resistance

THAV/THFV flue gas resistance

If the duct system has smoke ventilation, e.g. in apartment buildings, flue gas resistance in the duct system must be calculated from the following diagram. The THFV roof terminal has a fixed flue gas resistance.

THAV has an integral stop plate for insertion for smoke ventilation.