Good day,
I am currently planning a new heating system in North Rhine-Westphalia and have received several quotes.
At the moment, a gas heating system is in use, which will soon need to be replaced. The plan is to replace it with a heat pump.
The heat distribution system is underfloor heating covering 190 m² (2,045 sq ft) over two levels, and radiator heating for an outbuilding of about 40 m² (430 sq ft), which is usually only heated minimally (maintained between approximately 4 and 8°C (39°F to 46°F) during winter).
Additionally, a photovoltaic system of around 10 kWp, with the option to expand in the future, will be installed.
Currently, I have the following five estimates, which differ greatly both technically and in price.
(All prices include VAT.)
As a layperson, I naturally have little knowledge in this area and would appreciate advice on which offer is reasonable.
Furthermore, the various proposed heat pumps use different refrigerants: What should I pay attention to in this regard?
And more generally: What would you recommend?
Which brand is considered the best? Are there any that you would advise against?
Thank you very much in advance!
Best regards,
Lukas
1) Chofu with 16 kW (18,000 €)
(Installable this year)
CHOFU monoblock heat pump 16 kW
Refrigerant: R32
Switching valve
35 m (115 ft) piping
35 mm (1.4 inch) fittings
Including connection materials and installation
2) Bosch with 14.8 kW (26,400 €)
(Installable next January)
BOSCH split heat pump SAS 13-2 ASE, 14.8 kW, monovalent
Refrigerant: R410A
2x BOSCH remote controls/room controllers CR 10 H
BOSCH refrigerant lines SAS 3/8" and 5/8"
Wall mounting brackets for air/water heat pump
JUNKERS hot water switching valve 22-1 for heat pumps
Membrane expansion tank 25 l (6.6 gallons), silver, max. 3 bar
FLAMCO Flexcon suspension frame type MB 3
Logafix cap ball valve MK 3/4"
XStream vent-clean (DN20) K22
Pump group UK 1", without pump
Pump group MK 1", without pump
BOSCH mixing module MM 200 for 2 heating circuits
2x Grundfos circulation pumps Alpha1 25-60 180230V
2x Grundfos Alpha right-angle plugs, 4 m (13 ft) cable
Distributor bar for up to 3 heating circuits
BWT storage connection set 3/4" M KS 1267-34 M with 6 bar safety valve
Various pipes, fittings, and connectors
System filling according to ÖNORM
Work time: installation and connection of heat pump including accessories
Commissioning by factory service
3) IDM with 10 to 24 kW (45,000 €)
(Installable next March)
IDM AERO ALM heat pump 10-24 kW, modulating
Accessories AERO AL 10-24 (buffer tank, etc.)
Refrigerant: R290
3 x large-surface radiators
Various materials
Commissioning
Underfloor heating manifold
Small materials
Work time
4) IDM with 8 to 17 kW (30,000 €)
(Installable next December)
IDM AERO SLM heat pump 6-17 kW, with NAVIGATOR 2.0
Equipment variant HGL
Refrigerant: R410A
Commissioning
Room unit for one heating circuit to NAVIGATOR
EIB-KNX module
Air separator
Magnetic sludge separator
Refrigerant connection lines, length 5 m (16 ft)
Distributor for underfloor heating
5) Saunier Duval with 12 kW (25,000 €)
(Installable this October)
Saunier Duval heat pump with 12 kW
Refrigerant: R410A
3 x large-surface radiators
Various materials
Commissioning
Underfloor heating manifold
Work time
I am currently planning a new heating system in North Rhine-Westphalia and have received several quotes.
At the moment, a gas heating system is in use, which will soon need to be replaced. The plan is to replace it with a heat pump.
The heat distribution system is underfloor heating covering 190 m² (2,045 sq ft) over two levels, and radiator heating for an outbuilding of about 40 m² (430 sq ft), which is usually only heated minimally (maintained between approximately 4 and 8°C (39°F to 46°F) during winter).
Additionally, a photovoltaic system of around 10 kWp, with the option to expand in the future, will be installed.
Currently, I have the following five estimates, which differ greatly both technically and in price.
(All prices include VAT.)
As a layperson, I naturally have little knowledge in this area and would appreciate advice on which offer is reasonable.
Furthermore, the various proposed heat pumps use different refrigerants: What should I pay attention to in this regard?
And more generally: What would you recommend?
Which brand is considered the best? Are there any that you would advise against?
Thank you very much in advance!
Best regards,
Lukas
1) Chofu with 16 kW (18,000 €)
(Installable this year)
CHOFU monoblock heat pump 16 kW
Refrigerant: R32
Switching valve
35 m (115 ft) piping
35 mm (1.4 inch) fittings
Including connection materials and installation
2) Bosch with 14.8 kW (26,400 €)
(Installable next January)
BOSCH split heat pump SAS 13-2 ASE, 14.8 kW, monovalent
Refrigerant: R410A
2x BOSCH remote controls/room controllers CR 10 H
BOSCH refrigerant lines SAS 3/8" and 5/8"
Wall mounting brackets for air/water heat pump
JUNKERS hot water switching valve 22-1 for heat pumps
Membrane expansion tank 25 l (6.6 gallons), silver, max. 3 bar
FLAMCO Flexcon suspension frame type MB 3
Logafix cap ball valve MK 3/4"
XStream vent-clean (DN20) K22
Pump group UK 1", without pump
Pump group MK 1", without pump
BOSCH mixing module MM 200 for 2 heating circuits
2x Grundfos circulation pumps Alpha1 25-60 180230V
2x Grundfos Alpha right-angle plugs, 4 m (13 ft) cable
Distributor bar for up to 3 heating circuits
BWT storage connection set 3/4" M KS 1267-34 M with 6 bar safety valve
Various pipes, fittings, and connectors
System filling according to ÖNORM
Work time: installation and connection of heat pump including accessories
Commissioning by factory service
3) IDM with 10 to 24 kW (45,000 €)
(Installable next March)
IDM AERO ALM heat pump 10-24 kW, modulating
Accessories AERO AL 10-24 (buffer tank, etc.)
Refrigerant: R290
3 x large-surface radiators
Various materials
Commissioning
Underfloor heating manifold
Small materials
Work time
4) IDM with 8 to 17 kW (30,000 €)
(Installable next December)
IDM AERO SLM heat pump 6-17 kW, with NAVIGATOR 2.0
Equipment variant HGL
Refrigerant: R410A
Commissioning
Room unit for one heating circuit to NAVIGATOR
EIB-KNX module
Air separator
Magnetic sludge separator
Refrigerant connection lines, length 5 m (16 ft)
Distributor for underfloor heating
5) Saunier Duval with 12 kW (25,000 €)
(Installable this October)
Saunier Duval heat pump with 12 kW
Refrigerant: R410A
3 x large-surface radiators
Various materials
Commissioning
Underfloor heating manifold
Work time
L
Lukas453627 Aug 2022 17:51I have received several quotes, as mentioned, and they were within this range. However, most of them stated 17 kW.
L
Lukas453627 Aug 2022 18:18I have checked again: the heating load is 17 kW. What does high electricity costs AND short service life mean?
Lukas45362 schrieb:
I can’t provide specific insulation values, except that the walls are very thick, there is very thick polystyrene on the outside, the intermediate ceiling is thicker than usual, and the windows have triple-glazed insulating glass.
So far, the heating load calculations for the heat pump have always been between 12 and 17 kW. So the walls, top floor ceiling, and windows have good insulation? Did I understand that correctly?
If so, I find the calculated heating load of 17 kW at design outdoor temperature (NAT) clearly too high and I have doubts about it.
What do you mean when you say your gas boiler is about to give up?
Is there a hydraulic balancing in place?
Is there a basement, and is the ceiling insulated?
Why is there only frost protection for the outbuilding? Do you only need that temporarily? How many rooms does the building have?