Forum Handle: Pressure
Manufacturer: Daikin
Model:Daikin Altherma 1 Low Temperature Split With Wall Hung Indoor Units
Type: ASHP
Arrangement: Split
Area of Country: Sheffield, South Yorkshire
Home Type: Detached house
Size: Square Metres:
Insulation Level: 8? Pretty damn well insulated
Heat Loss Calculation: kW @ Amb. Temp, of: Don't know!
Type of Controller: Thermostats
Type of Control: Room Temperature
System Type: UFH
Total Output of Heat Emitters: 16kW
Buffer Tank or Low Loss Header: Used two have a low less header but "no longer needed"; big water tank
Secondary Pumps: 1 upstairs
Solar PV System: 5.6KW
Power Diverter: Not connected - Daikin didn't like it
Battery System: Not yet
Built house with 16kw gen-1 Daikin heat pump in 2008. Installed replacement 3rd-gen 9kw Daikin heat pump 2025. 5.6kw solar. Heat recovery and ventilation. UFH. Massive insulation.
Forum Handle: GGW
Manufacturer: Grant
Model: Grant 10kW Aerona 3 - 250L HP Cylinder, Warmflow.
Type: ASHP
Arrangement: Monobloc
Area of Country: Northern Ireland
Home Type: Detached House, 2 Storey
Size: Square Metres: 250m2
Insulation Level: 2022 Block Construction EPC 92A. 400mm Roof/Attic, 150mm Fully Bead Filled Cavity - 50mm insulated plasterboard, 150mm poured insulation - 50mm Liquid Screed. Air permeability 2.9 m³/(h.m²) @ 50 Pa
Heat Loss Calculation: 7.2kW @ Amb. Temp, of -1.5Deg
Type of Controller: Thermostats for each room, currently bypassed.
Type of Control: Fixed water Temp 30Deg using Grant controller in main kitchen
System Type: UFH both upstairs and down.
Total Output of Heat Emitters: kW Unknown
Buffer Tank or Low Loss Header: 30L Volumizer only.
Secondary Pumps: None.
Solar PV System: No, hopefully some day
Power Diverter: No.
Battery System: No, Hopefully some day.
Other information: MVHR, 2.4 air changes/hour equivalent.
Rod
Forum Handle: Rod
Manufacturer: Mitsubishi
Model: Ecodan 11.2KW
Type: ASHP
Arrangement: Mono
Area of Country: Kent
Home Type: Bungalow
Size: 140 sqm
Insulation Level: 6
Heat Loss Calculation:
Type of Controller: Wundasmart Thermostats in all rooms
Type of Control: Weather Compensation / Flow Temperature / Room Temperature max
System Type: UFH
Total Output of Heat Emitters:
Buffer Tank or Low Loss Header: No
Secondary Pumps: 2 pumps at UFH manifolds
Solar PV System: 3KW
Power Diverter: Yes, Eddi to Immersion
Battery System: No
Forum Handle: Denevil
Manufacturer: Grant
Model: 17kw Grant Aerona³ (HPID17R32)
Type: ASHP
Arrangement: Mono, Split, High Temp, Bivalent etc.
Area of Country: Herts
Home Type: Detached 1920's (full refurb)
Size: 220m2 (orig 130m2, extension 90m2)
Insulation Level: 130mm celotex in ceiling, 70mm external celotex on original walls, 150mm mineral wool in new cavity wall
Heat Loss Calculation: kW @ Amb. Temp, of: ?C (pending)
Type of Controller: Rad thermostat, UFH 2 zones
Type of Control: Adaptive, Weather Compensation, Flow Temperature (max 40 heating, 55 DHW), Room Temperature 19-20.
System Type: extension UFH, existing house Radiators
Total Output of Heat Emitters: kW (pending)
Buffer Tank or Low Loss Header: LLH
Secondary Pumps: 3
Solar PV System: No
Forum Handle: Thylacine333
Manufacturer: airwell (aka Midea unit rebranded)
Model: 12kw Welles monobloc R32
Type: ASHP
Arrangement: Mono?
Area of Country: Kent
Home Type: Detached 1960s with 2005 extension
Size: 200m2
Insulation Level: ?
Heat Loss Calculation: kW @ Amb. Temp, of: ?C (pending)
Type of Controller: salis thermostats x2, 1 for Rads 1 for UFH
Type of Control: weather comp Flow Temperature (max 40 heating, Room Temperature 18-19).
System Type: extension UFH, Radiators
Total Output of Heat Emitters: kW (pending)
Buffer Tank or Low Loss Header: ?
Secondary Pumps: ?
Solar PV System: No
Airwell Wellea 12 kw monobloc ASHP (rebranded Midea unit - feeling lonely)
200 sq m detached 1960s bungalow with 2006 extension
mix of rads and ufh
Handle: Salilah1173
Mitsubishi Ecodan 8.5kW
Type: ASHP
Arrangement: No idea - 2 zones, one UFH, other radiator
Area of Country: East Anglia
Home Type: House
Size: Square Metres:no idea - 4 bedrooms, 3 downstairs rooms
Insulation Level: 8? should be good - 20year old
Heat Loss Calculation: kW @ Amb. Temp, of: ?C - no idea
Type of Controller: upstairs thermostat
Type of Control: Weather Compensation (curve)
System Type: UFH, Radiators
Total Output of Heat Emitters: kW no idea
Buffer Tank or Low Loss Header: BT, LLH or No - huh?
Secondary Pumps: no idea but assume no?
Solar PV System: No
Power Diverter: huh?
Battery System: No
Handle: johnmo
Maxa i-32V5 6kW
Type: ASHP
Arrangement: 2 zones UFH, only one zone can call for heat, one zone in house other zone in garden pod. Both heating and cooling in floor.
Area of Country: NE Scotland
Home Type: House plus pod
Size: Square Metres: 192m2 plus 17m2
Insulation Level: excellent new build
Heat Loss Calculation: 3.9kW @ Amb. Temp, of: -5C for both buildings
Type of Controller: builtin to ASHP, plus thermostat in house and pod
Type of Control: Weather Compensation (curve) for heating, fixed temp for cooling
System Type: UFH
Total Output of Heat Emitters: matched to heat demand
Buffer Tank or Low Loss Header: BT, LLH or No - no
Secondary Pumps: no
Solar PV System: yes
Power Diverter: yes
Battery System: No
Maxa i32V5 6kW ASHP (heat and cooling)
6.5kW PV
13.5kW GivEnergy AIO Battery.
Forum Handle: dangermousie
Manufacturer:Vaillant
Model: 5kw AroTherm
Type: ASHP
Arrangement: ASHP can go to buffer or HW tank. Buffer can feed downstairs or upstairs but not both. (Is that what arrangement means?)
Area of Country: Berks
Home Type: Detached 2014
Size: 136m2
Insulation Level: 2014 standards I suppose!
Heat Loss Calculation: kW @ Amb. Temp, of: ?C (pending)
Type of Controller: Thermostats x2, Upstairs and downstairs
Type of Control: weather comp Flow Temperature
System Type: Radiators (replaced with larger)
Total Output of Heat Emitters: kW (unknown)
Buffer Tank or Low Loss Header: Buffer 200L
Secondary Pumps: No
Solar PV System: coming soon, with batteries
My tale of the tape...
Manufacturer: Mitsubishi
Model: Ecodan 8.5kw
Type: ASHP
Arrangement: Monoblock
Area of Country: Nth Lincolnshire
Home Type: Bungalow (detached, 3-bed)
Size: Square Metres: 145
Insulation Level: ~7
Heat Loss Calculation: 5.51kw @ -2.2c
Type of Controller: Main control panel but also Mitsu Wireless Room Thermostat, TRVs
Type of Control: Weather Compensation (45 @ -3c; 25 @ 19c)
System Type: 11 Radiators
Total Output of Heat Emitters: not known
Buffer Tank or Low Loss Header: No
Secondary Pumps: No
Solar PV System: 3kw (12 x 250w), south facing
Power Diverter: No
Battery System: No
Mitsubishi Ecodan 5kW ASHP - PUHZ-W50VHA2
Ecodan 210L Pre-plumbed Cylinder - EHPT21X-UKCHW
Ecodan FTC5 Controller with Wireless Room Stat and MELCloud WiFi remote monitoring & control
System is on a small bungalow with 7 radiators.
Handle: @dockray
Manufacturer: Mitsubishi
Model: Ecodan 8.5kw
Type: ASHP
Arrangement: Monobloc
Area of Country: Lake District (400m above sea level)
Home Type: Converted industrial building (one level plus mezzanine)
Size: Square Metres: 131m2
Insulation Level: 8
Heat Loss Calculation: Between 4.4kW & 4.9kW at -3.4*
Type of Controller: FTC main control panel, OMNIE wired room thermostats, MELCloud
Type of Control: Weather Compensation (28* flow temp @ -2c; still adjusting/guessing warm end of the curve yet but currently 20* flow temp at 10* outside) to maintain room temp of 19.5*
System Type: UFH 1 zone plus 2 radiators on the mezzanine.
Total Output of Heat Emitters: 5.6kW
Buffer Tank or Low Loss Header: Buffer tank
Secondary Pumps: Pump to get DHW to taps/showers so we don't have to leave them running for ages before they go hot (don’t know what its called!)
Solar PV System: No
Power Diverter: No
Battery System: No
Forum Handle: timatheronwood
Manufacturer: Daikin
Model: 3HT HT_767 High Temperature split (R32)
Type: ASHP
Arrangement: Split, High Temp, Bivalent (at the moment)
Area of Country: South Central
Home Type: House
Size: Square Metres: 305
Insulation Level: Scale of 1 to 10 possibly? Not sure but the ASHP installer and insulation consultant gave us
Heat Loss Calculation: 12.5 kW @ Amb. Temp, of: ?C – in the RHI calculation the estimated output required was 15000kWh for space heating and 4999kWh for water heating.
Type of Controller: Thermostats, TRV's
Type of Control: Adaptive, Weather Compensation, Flow Temperature designed for , Room Temperature etc.
System Type: Radiators
Total Output of Heat Emitters: kW
Buffer Tank or Low Loss Header: Not known
Secondary Pumps: Number or No
Solar PV System: 3.8kW
Power Diverter: No
Battery System: No
The EPC says that the house is a C!
I hope that this information helps someone understand our system.
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