I've got a Mitsubishi Ecodan 6KW with a 170 litre slimline pre-plumbed unit with an FTC7. 

Forum Handle: Odd_Lion

Manufacturer: Samsung

Model: Samsung Mono R290 12kW

Type: ASHP

Arrangement: Split, low temperature

Area of Country: London

Home Type: Semi-detached

Size: 143 sq m

Insulation Level: Insulated loft and under GF, Solid brick walls, 1896 build.

Heat Loss Calculation: 10.13kW

Type of Controller: 1 thermostat zone for whole house

Type of Control: Weather Compensation plus thermostat

System Type: Radiators throughout house (11 total, mostly triple Stelrads)

Total Output of Heat Emitters:

Buffer Tank or Low Loss Header: NA

Secondary Pumps: No

Solar PV System: Yes, 19 420W panels (13 on roof, 6 on south facing wall)

Power Diverter: No

Battery System: Yes, 16.8kWh Solax battery array

Forum Handle: Odd_Lion

Manufacturer: Samsung

Model: Samsung Mono R290 12kW

Type: ASHP

Arrangement: Split, low temperature

Area of Country: London

Home Type: Semi-detached

Size: 143 sq m

Insulation Level: Insulated loft and under GF, Solid brick walls, 1896 build.

Heat Loss Calculation: 10.13kW

Type of Controller: 1 thermostat zone for whole house

Type of Control: Weather Compensation plus thermostat

System Type: Radiators throughout house (11 total, mostly triple Stelrads)

Total Output of Heat Emitters:

Buffer Tank or Low Loss Header: NA

Secondary Pumps: No

Solar PV System: Yes, 19 420W panels (13 on roof, 6 on south facing wall)

Power Diverter: No

Battery System: Yes, 16.8kWh Solax battery array

My turn, this describes the future installation, only the heat pump and UFH are operational at the moment.

Manufacturer: LG

Model: HM163HF.UB60

Type: ASHP 16kW Monobloc R290

Arrangement: Low temp HP + wood boiler backup

Area of Country: Lyon, France

Home Type: House

Size: Square Metres: 380

Insulation Level: R=5.7 walls, R=7 roof

Heat Loss Calculation: 8-12kW @ Amb. Temp, of: -7C

Type of Controller: Modulating

Type of Control: Weather Compensation, Flow Temperature, Room Temperature

System Type: UFH, Radiant ceilings, Fan coils for cooling

Total Output of Heat Emitters: Way more than necessary. Concrete slabs alone can store at least 30kW and release through the day.

Buffer Tank or Low Loss Header: 1000l tank with instant DHW coil used as Buffer on wood boiler, heat pump will heat it for DHW also. For regular heating, heat pump direct to slabs & radiant ceilings.

Secondary Pumps: 2 most likely

Solar PV System: 12kWp

Power Diverter: Yes for EV charging, soon for heat pump

Battery System: 20kWh

Forum Handle: Alan(alan22)

Manufacturer: Valiant

Model: 7kw

Type: ASHP.

Arrangement: No idea.

Area of Country: Ayrshire Scotland.

Home Type: Cottage. 

Size: Square Metres: 185 square m. 

Insulation Level: 8 heading to 9/10

Heat Loss Calculation: I'd need to go check

Type of Controller: black box on the wall, no idea how it works yet.

Type of Control: Adaptive.

System Type: Radiators. 

Total Output of Heat Emitters: ?

Buffer Tank or Low Loss Header: don't know, it's got a small tank on the wall?

Secondary Pumps: No

Solar PV System: No

Power Diverter: No

Battery System: No

Forum Handle: ispookie666

Manufacturer: Vaillant

Model: 10Kw

Type: ASHP.

Arrangement: Monoblock + single zone + Unistor 250L tank

Area of Country: Cambridgeshire

Home Type: Detached. 

Size: Square Metres: 150. 

Insulation Level: 8

Heat Loss Calculation: 8.07

Type of Controller: Vaillant Sensocomfort

Type of Control: Weather compensation 

System Type: Radiators. 

Total Output of Heat Emitters: 12

Buffer Tank or Low Loss Header: No

Secondary Pumps: No

Solar PV System: 9.2 KWp Enphase micro inverters  and export limit of 10.Kwh

Power Diverter: Yes  (disconnected - iBoost) + EV Charger

Battery System: 8.2KWh * 2 Givenergy AC coupled + 2.4KWh * 2 Renogy - Victron Mulplux 2 GX

Posted by: @davec

↑

Forum Handle: @davec

Manufacturer: Peak Energy

Model: 11kW V-Therm S-Maxi

Type: ASHP

Arrangement: Monobloc

Area of Country: North West England

Home Type: House, semi-detached

Size: Square Metres: 122m2

Insulation level: loft insulation, some suspended floor insulation, no cavity insulation

Heat Loss Calculation: 7kW @ Amb. Temp, of: -2C

Type of Controller: external EPH Thermostat, each radiator with TRV

Type of Control: Weather Compensation, Flow Temperature, Room Temperature via EPH thermostat

System Type: Radiators

Total Output of Heat Emitters: 11 triple column radiators and 2 towel rail radiators

Buffer Tank or Low Loss Header: BT, I think built in to the water cylinder

Secondary Pumps: No

Solar PV System: SunSynk 3.6kW Inverter with 3.5kWh panels

Power Diverter: Yes solar diverter, but switched off

Battery System: 10kWh house battery

Peak system has now replaced with a Grant Aerona r290 12KW and a Grant quick recovery 210l water tank.

Full Weather Compensation control.

No buffer tank or volumiser.

Manufacturer: appliances direct/superheat

Model: 7Kw

Type: ASHP.

Arrangement: Monoblock + single zone, open loop. No hot water

Area of Country: Schleswig-Holstein, Germany

Home Type: Detached, long bungalow. 

Size: Square Metres: 120. 

Heat Loss Calculation: 6

Type of Controller: supplied with heatpump

Type of Control: Weather compensation 

System Type: Radiators. 

Buffer Tank or Low Loss Header: No

Secondary Pumps: No

DIY installation cost w/o grant: £1400

Ecodan 14Kw R32

Vaillant arotherm plus 12kW.  Installed March 2025.  Excellent performance.  I rarely use its full capacity as it is designed to cover the whole house and as I live alone and have the Honeywell controller system with 12 zones to select the temperatures of each zone.  Despite being more powerful than necessary it still is efficient in my 1975 bungalow, which wasn't built to modern standards, and I get a SCOP of 3.6, including heating my water.  Thanks to solar panels, batteries and Octopus Intelligent Go my bills are much lower than when I had gas heating and, in fact, owing to a generous export tariff my energy use costs me nothing, including car charging.

orum Handle: alincork

Manufacturer: Midea

Model: Mono R32 6kW

Type: ASHP

Arrangement: monobloc

Area of Country: South

Home Type: detached

Size: 120 sq m

Insulation Level: 7/10

Heat Loss Calculation: 5kw

Type of Controller: 2 zones plus hot water

Type of Control: Weather Compensation only

System Type: Radiators throughout house 

Total Output of Heat Emitters:

Buffer Tank or Low Loss Header: NA

Secondary Pumps: No

Solar PV System: 10kw 22 panels 5.5kw inverter 

Power Diverter: No

Battery System: 32kw 

Forum Handle: GotGordon

Manufacturer: Samsung

Model: 16kW EHS Mono Outdoor Unit AE16OCXYBEK/EU

Type: ASHP

Arrangement: Gas Boiler replacement: DHW converted from gravity feed to mains pressure system

Low temperature (55 C) Two UFH zones with Thermostats & 2 port Valves

+ two radiator circuit loops with 8 radiators + 250 L Tempest  Horizontal DHW Cylinder in loft

Area of Country: Hampshire

Home Type: 4 Bedroom Detached Chalet Bungalow + annexe

Size: 2,152 sq m

Insulation Level: Insulated cavity walls, 2014 refurbished house 

Heat Loss Calculation: Energy requirement for heating and hot water total 18045 kWh per year

Type of Controller: Wired controller & WiFi access to Samsung Smart Things

Type of Control: Weather Compensation plus thermostats on 2 x UFH zones

System Type: 2 x UFH zones downstairs, 8 radiators upstairs with TRV's

Total Output of Heat Emitters: 14.5 kW

Buffer Tank : CALEFFI Buffer tank

Secondary Pumps: 2 (UFH manifold mixing valves probably not now necessary)

Solar PV System: 18 panels 5kW SolarEdge Invertor

Power Diverter: EDDI hot water immersion divertor (considering SolarEdge Home Hub off grid divertor)

Battery System: 10kWh SolarEdge