What output is the heat pump sized on?

On a share of the heat loss at the design temperature, between 40 and 80 %, raised where needed so it covers at least 70 % of the heating demand expressed as an average output over the heating season.

Is the sizing report compliant?

Yes: EN 12831-1, at the outdoor design temperature of the town where the works take place, generated from the data collected during the site visit.

Do the boiler ratings have to be typed in?

No, when the boiler is in the catalogue: energy, rated output, standby loss Qp0, operating temperatures at 30 and 100 %, Rpn and Rpint efficiencies and generation efficiency all come from the product record.

Is the expected coverage rate the same as on an air-to-water pump?

No. On a hybrid heat pump Argile expects coverage between 40 and 80 % of the heat loss, where an air-to-water pump is expected between 80 and 120 %. The sizing alerts are set on those bounds.

Features / Hybrid heat pump sizing

Hybrid heat pump sizing

A hybrid heat pump is sized on its bivalence point

Request a demo

No commitment, 30-minute demo

Camille Martin

Works plan

Installing a hybrid heat pump

Save the job

Home details

Works

Equipment choice

Projected works

Next step

Total cost

Equipment cost

8 146,60 €

Labour cost

4 200,00 €

Accessories cost

640,00 €

Total incl. VAT

12 986,60 €

Annual consumption comparison

642 €

3 210 KWH

Heat pump to install

1 840 €

9 200 KWH

Current system

1 980 €

14 500 KWH

Oil boiler

1 460 €

13 800 KWH

Gas boiler

980 €

15 200 KWH

Biomass boiler

2 310 €

11 550 KWH

Electric radiators

Coverage of the heating load

91 %

Energy delivered by the heat pump

9 %

Energy delivered by the backup

+0,1 °C

Bivalence temperature

86 h

Short-cycling hours / year

Heating load

Heat pump output

Main heating

A hybrid heat pump is not sized like an air-to-water one: the machine carries most of the heating season, the boiler takes over below the bivalence temperature, and it is that split between the two energies that decides the customer’s bill.

Size both at once

the heat pump and the boiler against the same computed load: the machine takes 40 to 80 % of the heat loss at the design temperature

Heat loss at the design temperature (−7 °C)

6,00 kW

2,40 kW

4,00 kW

4,80 kW

The heat pump is placed between 40 and 80 % of the heat loss; the boiler covers the rest.

Vitocal 250-A 04

Viessmann

Heat pump coverage

67 %

Vitodens 100-W 25

Viessmann

Boiler share at the coldest hour

51 %

91 %

Heat pump energy

9 %

Backup energy

+0,1 °C

Bivalence

86 h

Short cycling / year

Heating load

Heat pump output

Main heating

The bivalence point, computed

bivalence temperature, share of energy delivered by the heat pump, share delivered by the backup and short-cycling hours, read above the curve

Vitodens 100-W 25

Viessmann

Energy

Natural gas

Rated output

24 kW

Rpn efficiency

92 %

Rpint efficiency

95 %

Standby loss Qp0

0,10 kW

Generation efficiency

90 %

Boiler share at the coldest hour

51 %

The boiler described like the pump

energy, rated output, Rpn and Rpint efficiencies, standby loss Qp0: the boiler carries its ratings in the catalogue

Roofs

Transmittance W/m².K

1,8

Area m²

65,2

Heat loss W/K

135,0

Façades

Transmittance W/m².K

0,9

Area m²

162,4

Heat loss W/K

151,4

Floors

Transmittance W/m².K

0,6

Area m²

63,0

Heat loss W/K

15,6

Openings

Transmittance W/m².K

1,2

Area m²

5,5

Heat loss W/K

10,9

Sizing report compliant with EN 12831-1

heat loss element by element, the town’s outdoor design temperature and the coverage rate: the report comes out of the journey as one document

Annual consumption comparison

642 €

3 210 KWH

Heat pump to install

1 840 €

9 200 KWH

Current system

1 980 €

14 500 KWH

Oil boiler

1 460 €

13 800 KWH

Gas boiler

980 €

15 200 KWH

Biomass boiler

2 310 €

11 550 KWH

Electric radiators

What the customer sees at the end of the visit

annual consumption compared between the hybrid system and the heating in place, and the outdoor unit projected onto the photo of the facade

They already trust us

+2000

installers

size their heat pumps with Argile

10,000

products

kept up to date in our manufacturer catalogues

The journey

Camille Martin

Works plan

Installing a hybrid heat pump

Save the job

Home details

Works

Equipment choice

Projected works

Next step

Zones to heat

Emitter coverage

105 %

Radiators

Area to heat *

130 m²

/ 151 m²

Add an emitter

Emitters in place and the dwelling’s load

6,00 kW

Heat loss of the home over the heated area

6,30 kW

105 % coverage

Estimated emitter output at the chosen water temperature

The customer’s heating preferences

Indoor set temperature

19°

20°

21°

22°

23°

Economy

Standard

Comfort

Comfort +

High performance

Flow water temperature

35°

40°

45°

50°

55°

60°

65°

70°

75°

Low temp.

Medium temp.

Recommended

High temp.

Home details

Zones to heat and emitters in place, indoor set point and flow temperature: Argile checks the load against the output of the existing radiators and shows the emitter coverage rate before any machine is picked.

Camille Martin

Works plan

Installing a hybrid heat pump

Save the job

Home details

Works

Equipment choice

Projected works

Next step

Type of equipment to install

Split

Monobloc

Number of phases

Single-phase

Three-phase

Boiler

Boiler energy and ratings

Natural gas

Oil

Propane

Butane

LPG

Rated output

−

24 kW

Unit positions

Add the indoor and outdoor units

Outdoor unit

Ground floor

Indoor unit

Ground floor

Cabling

Refrigerant line

−

10 m

Power cable

−

8 m

Works

Configuring the heat pump and the boiler: equipment type, boiler energy among natural gas, oil, propane, butane and LPG, indoor and outdoor units placed on the floor plan, then the refrigerant and electrical runs measured.

Camille Martin

Works plan

Installing a hybrid heat pump

Save the job

Home details

Works

Equipment choice

Projected works

Next step

Choosing the hybrid heat pump

Heat pump coverage

67 %

Viessmann

Vitocal 250-A 04

Heat pump

ηs 35 °C

191 %

ηs 55 °C

148 %

COP

3,40

Output

4,00 kW

Max temp.

60 °C

Phases

Single-phase

Price excl. VAT

5 120,00 €

VAT

5,50 %

Price incl. VAT

5 401,60 €

Viessmann

Vitodens 100-W 25

Boiler

Vitodens 100-W 25

Viessmann

Energy

Natural gas

Rated output

24 kW

Rpn efficiency

92 %

Rpint efficiency

95 %

Standby loss Qp0

0,10 kW

Generation efficiency

90 %

Boiler share at the coldest hour

51 %

Heat loss at the design temperature

6,00 kW

2,40 kW

4,00 kW

4,80 kW

The heat pump is placed between 40 and 80 % of the heat loss; the boiler covers the rest.

Coverage of the heating load

91 %

Energy delivered by the heat pump

9 %

Energy delivered by the backup

+0,1 °C

Bivalence temperature

86 h

Short-cycling hours / year

Equipment

Equipment picked from the catalogues Argile keeps up to date, under the heading « Choix de la pompe à chaleur hybride »: seasonal efficiency at 35°/55°, COP and output for the machine, rated output and efficiencies for the boiler, services and accessories added inclusive of VAT.

Camille Martin

Works plan

Installing a hybrid heat pump

Save the job

Home details

Works

Equipment choice

Projected works

Next step

Total cost

Equipment cost

8 146,60 €

Labour cost

4 200,00 €

Accessories cost

640,00 €

Total incl. VAT

12 986,60 €

Annual consumption comparison

642 €

3 210 KWH

Heat pump to install

1 840 €

9 200 KWH

Current system

1 980 €

14 500 KWH

Oil boiler

1 460 €

13 800 KWH

Gas boiler

980 €

15 200 KWH

Biomass boiler

2 310 €

11 550 KWH

Electric radiators

Coverage of the heating load

91 %

Energy delivered by the heat pump

9 %

Energy delivered by the backup

+0,1 °C

Bivalence temperature

86 h

Short-cycling hours / year

Heating load

Heat pump output

Main heating

Project projections

Total cost including VAT, annual consumption compared with the other energies, and hourly coverage of the load: energy delivered by the heat pump, energy delivered by the backup, bivalence temperature and short-cycling hours over the year.

Cengiz DonmezWhole-home renovationGroupe TILKEO50 employees

“When several teams are involved, everyone needs to work with the same information. Argile helps us standardize our visits and better manage our projects.”

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The Argile building blocks that pair best with this one, from the survey through to the job site.

Air-to-water heat pump

From the site visit to a sizing report compliant with EN 12831-1: Argile guides your teams at every step, calculates the required output, picks the equipment from up-to-date catalogues and shows the customer the energy they will save.

Heat pump sizing note

Calculated to NF EN 12831-1

General information

Beneficiary

Mrs Margaret Hughes

contact@argile.ai

Phone

+44 7700 900457

Works address

7 Rosewood Close, Sheffield

Air-to-water heat pump

Model

Alféa Extensa S. 10

Make

Atlantic

Rated output

10 kW

ηs at 35 °C / 55 °C

195 % / 154 %

COP

3,5

Controller

Classe VI

EPREL no.

2491075

Heat loss of the home

6,0 kW

Output at the design temperature

5,80 kW

3,59 kW

7,78 kW

0 %

60 %

130 %

Coverage of the demand

Equipment output / heat loss of the home

97 %

Sizing of the appliance

Roofs

Transmittance W/m².K

1,8

Area m²

65,2

Heat loss W/K

135,0

Floors

Transmittance W/m².K

0,6

Area m²

63,0

Heat loss W/K

15,6

Thermal bridges

Conductivity W/K/m

0,4

Lengths m

33,4

Heat loss W/K

12,5

Façades

Transmittance W/m².K

0,9

Area m²

162,4

Heat loss W/K

151,4

Openings

Transmittance W/m².K

1,2

Area m²

5,5

Heat loss W/K

10,9

Air renewal

Air change rate h⁻¹

0,8

Heat loss W/K

102,3

Temperature difference

Outdoor design temperature

-7 °C

Heat pump cut-off temperature

5 °C

Indoor set temperature

19 °C

DeltaT

14,0 °C

Construction coefficient

Volume (area × ceiling height)

378,0 m³

Equivalent G value

1,13 W/m³/K

Sizing report

Compliant with EN 12831-1 and built from the data collected during the site visit, the sizing report comes out of the flow with no extra work, ready for the customer's file.

Catalogues

Argile catalogue

Air-to-water heat pump

Argile catalogue

Add a product

Article base

Central articles, shared across all your equipment

Careful, this article is shared

This article is used in 14 products; any change will apply everywhere.

Name / Reference

Brand

Purchase cost

Selling price

VAT

Unit

Used in

Liaison frigorifique 5 m

ATL-LF05

Atlantic

68,00 €

119,00 €

5,5 %

Unit

14 products

Ballon tampon 25 L

ATL-BT25

Atlantic

142,00 €

245,00 €

5,5 %

Unit

9 products

Câble d’alimentation 3G2,5

GEN-C3G25

—

3,10 €

5,80 €

5,5 %

Linear metre

37 products

Support antivibratile

GEN-SAV

—

24,00 €

42,00 €

5,5 %

Unit

22 products

Kit hydraulique 3 voies

ATL-KH3V-08

Atlantic

186,00 €

312,00 €

5,5 %

Unit

6 products

Vase d’expansion 12 L

GEN-VE12

—

31,00 €

58,00 €

5,5 %

Unit

41 products

Tube PER pré-gainé Ø16

GEN-PER16

—

2,40 €

4,60 €

5,5 %

Linear metre

28 products

Filtre magnétique

GEN-FM22

—

54,00 €

96,00 €

5,5 %

Unit

33 products

Catalogues

Argile builds your price library from the catalogues of the brands you distribute: every product carries its price breakdown, equipment, labour and accessories, with technical specifications checked one by one and tariffs carried through at every range change.

FAQ

Browse the answers to the most frequent questions. And if needed, our team is here to help.

Below the bivalence temperature. Argile computes it from the hourly simulation and shows it above the coverage curve, along with the share of energy delivered by the heat pump and the share delivered by the backup.

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