Tecalor heat pumps

Air/water monoblocGround sourceHot waterExhaust air 13 series

tecalor GmbH is a German heat pump and ventilation brand based in Holzminden and part of the Stiebel Eltron group; it sells through heating installers and wholesale, and its heat pumps are largely the same units Stiebel Eltron sells under its own name. The range covers the TTL comfort and eco R290 air-to-water monoblocks, the THZ integral units (heat pump plus ventilation), the TTF and TTC brine-to-water units and the TTA hot water heat pumps, controlled by the WPM heat pump manager with the ISG Connect TEC gateway.

Checked November 2, 2026 · Holzminden, Germany · Manufacturer website

Tecalor TTL comfort

Photo: Tecalor

Grant lists

BAFA WEP (Germany)

11 / 13 checked November 4, 2026

ZUM (Poland)

0 / 13 checked November 4, 2026

Tecalor in Zerofy

Zerofy has no integration for Tecalor yet. Where a series below has an SG Ready input, Zerofy can still switch it through a Shelly relay. The heat pump comparison lists every brand Zerofy supports.

Tecalor heat pump types

Air-to-water monoblock4 Ground-source (brine/water)5 Hot water heat pumps2 Exhaust-air heat pumps2

Tecalor Air-to-water monoblock

The whole refrigerant circuit sits in one outdoor unit; only water pipes run into the house. The most common choice for retrofits, because no refrigerant lines need to be installed inside.

Air/water monoblocR290

Tecalor TTL comfort

8 models

Output
5–14.6 kW
SCOP 35 °C
4.89–5.35
Max. flow
75 °C
BAFA WEP
8 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Air/water monoblocR290

Tecalor TTL eco

5 models

Output
4.7–17.1 kW
SCOP 35 °C
4.55–4.69
Max. flow
75 °C
BAFA WEP
5 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Air/water monoblocR452B / R454CDiscontinued

Tecalor TTL .6 (R454C / R452B)

4 models

Output
4.4–12.6 kW
SCOP 35 °C
4.31–4.35
Max. flow
–
BAFA WEP
4 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Air/water monoblocR410ADiscontinued

Tecalor TTL (R410A)

15 models

Output
4.1–13.5 kW
SCOP 35 °C
4.11–4.87
Max. flow
–
BAFA WEP
15 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Tecalor Ground-source (brine/water)

Draws heat from a borehole or ground loop, so the source stays at a steady temperature all winter. Higher efficiency and no outdoor noise, but boreholes cost money and need a permit.

Ground sourceR454C

Tecalor TTF .6

10 models

Output
4.2–14.8 kW
SCOP 35 °C
5.07–5.59
Max. flow
75 °C
BAFA WEP
10 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Ground sourceR454C

Tecalor TTC .6

10 models

Output
4.2–14.8 kW
SCOP 35 °C
5.07–5.59
Max. flow
75 °C
BAFA WEP
10 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Ground sourceR290

Tecalor TTF comfort (R290)

4 models

Output
7–11.6 kW
SCOP 35 °C
5.21–5.4
Max. flow
70 °C
BAFA WEP
4 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Ground sourceR290

Tecalor TTC comfort (R290)

4 models

Output
7–11.6 kW
SCOP 35 °C
5.21–5.4
Max. flow
70 °C
BAFA WEP
4 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Ground sourceR452BDiscontinued

Tecalor TTF / TTC .5 (R452B)

6 models

Output
7.4–16.7 kW
SCOP 35 °C
4.79–5.09
Max. flow
–
BAFA WEP
6 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Tecalor Hot water heat pumps

A small heat pump built onto a hot water tank. It heats drinking water only and is a good way to turn surplus solar into stored heat – or to add hot water to a house that is otherwise heated differently.

Hot waterR290

Tecalor TTA comfort

3 models

Output
–
SCOP 35 °C
–
Max. flow
–
BAFA WEP
Not confirmed
ZUM
Not confirmed
Zerofy
Via SG Ready
Details and listed models

Hot waterR290

Tecalor TTA topline

3 models

Output
–
SCOP 35 °C
–
Max. flow
–
BAFA WEP
Not confirmed
ZUM
Not confirmed
Zerofy
Via SG Ready
Details and listed models

Tecalor Exhaust-air heat pumps

Take their heat from the ventilation air leaving the house. Compact and quiet, suited to well-insulated houses and small heating loads.

Exhaust airR290

Tecalor THZ .1 integral units

4 models

Output
4.7–6 kW
SCOP 35 °C
4.28
Max. flow
–
BAFA WEP
4 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Exhaust airR410ADiscontinued

Tecalor THZ (R410A)

3 models

Output
5.5–8.4 kW
SCOP 35 °C
4.14–4.21
Max. flow
–
BAFA WEP
3 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Tecalor series at a glance

Series Type Output SCOP 35 °C SCOP 55 °C Refrigerant Max. flow BAFA WEP ZUM SG Ready Modbus EEBUS
TTL comfort Air/water monobloc 5–14.6 kW* 4.89–5.35 3.99–4.07 R290 75 °C 8 models listed No model on the list Yes Yes Yes
TTL eco Air/water monobloc 4.7–17.1 kW* 4.55–4.69 3.79–3.85 R290 75 °C 5 models listed No model on the list Yes Yes Yes
TTL .6 (R454C / R452B) Discontinued Air/water monobloc 4.4–12.6 kW* 4.31–4.35 3.45–3.9 R452B / R454C – 4 models listed No model on the list Yes Yes Yes
TTL (R410A) Discontinued Air/water monobloc 4.1–13.5 kW* 4.11–4.87 3.2–3.75 R410A – 15 models listed No model on the list Yes Yes Yes
TTF .6 Ground source 4.2–14.8 kW 5.07–5.59 4.02–4.42 R454C 75 °C 10 models listed No model on the list Yes Yes Yes
TTC .6 Ground source 4.2–14.8 kW 5.07–5.59 4.02–4.42 R454C 75 °C 10 models listed No model on the list Yes Yes Yes
TTF comfort (R290) Ground source 7–11.6 kW 5.21–5.4 4.05–4.19 R290 70 °C 4 models listed No model on the list Yes ?Not confirmed ?Not confirmed
TTC comfort (R290) Ground source 7–11.6 kW 5.21–5.4 4.05–4.19 R290 70 °C 4 models listed No model on the list Yes ?Not confirmed ?Not confirmed
TTF / TTC .5 (R452B) Discontinued Ground source 7.4–16.7 kW* 4.79–5.09 3.7–3.83 R452B – 6 models listed No model on the list Yes Yes Yes
TTA comfort Hot water – – – R290 – Not confirmed Not confirmed Yes –Not documented –Not documented
TTA topline Hot water – – – R290 – Not confirmed Not confirmed Yes –Not documented –Not documented
THZ .1 integral units Exhaust air 4.7–6 kW* 4.28 3.27–3.28 R290 – 4 models listed No model on the list Yes Yes Yes
THZ (R410A) Discontinued Exhaust air 5.5–8.4 kW* 4.14–4.21 3.28–3.3 R410A – 3 models listed No model on the list Yes Yes Yes

Heating output is the figure in the manufacturer's datasheet; the basis (nominal output at A7/W35 or B0/W35, or design heat load) differs between brands, so check the datasheet before comparing. * = design heat load Pdesignh at 35 °C from the BAFA portal.

Sources

Specifications come from the manufacturer's datasheets linked above, grant status from the official lists below, checked November 2, 2026:

  1. www.tecalor.de/de/produkte/waermepumpe/alle-produkte.html
  2. www.tecalor.de/de/produkte/lueftung/alle-produkte.html
  3. www.tecalor.de/de/produkte/regelung_energiemanagement/kommunikation/isg-connect-tec/isg...
  4. www.tecalor.de/content/dam/tec/de/de/downloads/202505_Kompatibilitaetsliste_ISG_TEC.pdf
  5. www.stiebel-eltron.de/toolbox/content/docs/anleitungen/installation/ISG_Modbus/321798-4...
  6. elan1.bafa.bund.de/zvi-ui/wep/waermepumpen
  7. BAFA Wärmeerzeuger-Portal – Wärmepumpen – checked November 4, 2026
  8. Lista ZUM (Instytut Ochrony Środowiska) – checked November 4, 2026
  9. EEBUS certified devices – checked November 2, 2026

SG Ready is a label of the Bundesverband Wärmepumpe (BWP) e.V.; “Yes” means the manufacturer documents the two-input interface or declares it on the BAFA portal, not that the series carries the BWP label – the label list is at waermepumpe.de. EEBUS is a standard of the EEBus Initiative e.V.; Modbus is a registered trademark of Schneider Electric, licensed to the Modbus Organization. Product names, logos and photos belong to their manufacturers and are shown to identify the products. Grant data: BAFA Wärmeerzeuger-Portal and Lista ZUM (IOŚ-PIB) as of the dates shown; the SCOP at 55 °C in the BAFA tables is calculated by Zerofy from the portal's ηs value.

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