Posted by: @rusty

@prjohn

Wouldn’t you also need the heat loss estimate for the house, or the W/m2, to take into account the construction/insulation?

If Homeowners are prepared to provide the information, then maybe a spreadsheet containing the following information would be of most use from the comparison, and highlighting of possible problems, point of view.

Forum Handle:

Manufacturer:

Model:

Type: ASHP, GSHP, Other

Arrangement: Mono, Split, High Temp, Bivalent etc.

Area of Country: General Location

Home Type: House, Bungalow, Cottage etc.

Size: Square Metres:

Insulation Level: Scale of 1 to 10 possibly?

Heat Loss Calculation: kW @ Amb. Temp, of: ?C

Type of Controller: Modulating, Thermostats, TRV's etc.

Type of Control: Adaptive, Weather Compensation, Flow Temperature, Room Temperature etc.

System Type: UFH, Radiators etc.

Total Output of Heat Emitters: kW

Buffer Tank or Low Loss Header: BT, LLH or No

Secondary Pumps: Number or No

Solar PV System: Size or No

Power Diverter: Yes or No

Battery System: Size or No

Anything else that anyone can think may be useful. Please feel free to rearrange the order.

For my personal viewing only, bank account details and all necessary passwords and access codes. 😀 

I might as well add info in the way @derek-m described for future reference, but in short I have an 8kW Daikin EDLA model.

Manufacturer: Daikin 

Model: EDLA08E2V3

Type: ASHP

Arrangement: Mono

Area of Country: Midlands

Home Type: House - detached

Size: Square Metres: 145

Insulation Level: Maybe a 7/10? Built in the last 10 years so pretty good but nothing special 

Heat Loss Calculation: kW @ Amb. Temp, of: 5.9kW at -3.4C

Type of Controller: Pure LWT control with a couple of TRVs in bedrooms. Might add custom modulation at some point. 

Type of Control: Weather compensating

System Type: Radiators (with 10mm copper microbore) 

Total Output of Heat Emitters: 6.3kW at DT25 (20.8kW at DT50) 

Buffer Tank or Low Loss Header: No 

Secondary Pumps: 1 (to boost flow through microbore) 

Solar PV System: 7.5kW (to be installed on Jan)

Power Diverter: No(t yet) 

Battery System: No

Best I can do with this - 

Forum Handle: redbuzzard

Manufacturer: Mitsubishi

Model: Ecodan 11.2kW with pre plumbed cylinder & FTC6 controller

Type: ASHP

Arrangement: Monobloc

Area of Country: West Herts

Home Type: House

Size: Square Metres: 212 heated area

Insulation Level: 2021 Timber framed, masonry cladding. EPC 87B.  Wall U-value 0.13 W/m²K. Air permeability 2.9 m³/(h.m²) @ 50 Pa

Heat Loss Calculation: 6.47kW @ Amb. Temp, of NOT STATED

Type of Controller: Thermostats for each room.

Type of Control: Weather compensation 40c – 30C.

System Type: UFH.

Total Output of Heat Emitters: kW UNKNOWN

Buffer Tank or Low Loss Header: UNKNOWN

Secondary Pumps: UNKNOWN

Solar PV System: No

Power Diverter: UNKNOWN

Battery System: No

Other information:  MVHR, 2.4 air changes/hour equivalent.  

Hi, Here's my info

Forum Handle: gfletcher

Manufacturer: Mitsubishi

Model: Ecodan 8.5kW with mixergy cylinder

Type: ASHP

Arrangement: Monobloc

Area of Country: Leicester

Home Type: Detached house

Size: Square Metres: 132

Insulation Level: Maybe 7/10 - external wall insulation.

Heat Loss Calculation: 8.15kW @ -3.4

Type of Controller: Thermostat in middle of house and digital TRV's in most rooms

Type of Control: Weather compensation

System Type: Radiators

Total Output of Heat Emitters: 8.6kW 

Buffer Tank or Low Loss Header: No

Secondary Pumps: No

Solar PV System: 3.2kW

Power Diverter: Yes

Battery System: No

Cheers

Gavin

Am I the only person here with a cascade system?

Forum Handle:TomMcL

Manufacturer: Mitsubishi

Model:2 X 11.2 KW Ecodan Cascade system

Type: ASHP,

Arrangement: Mono,

Area of Country: Cheshire

Home Type: House,

Size: Square Metres: 281

Insulation Level: 7

Heat Loss Calculation: 16.5 kW @ Amb. Temp, of: ?C

Type of Controller:Mitsubishi FTC and wireless remote controller

Type of Control: Weather Compensation,

System Type: Radiators not upgraded

Total Output of Heat Emitters: kW

Buffer Tank or Low Loss Header: LLH

Secondary Pumps: Number or No

Solar PV System: 6 KW coming soon

Power Diverter: Yes

Battery System: Not Yet

Anything else that anyone can think may be useful. Please feel free to rearrange the order.

For my personal viewing only, bank account details and all necessary passwords and access codes.  

Posted by: @tommcl

↑

Am I the only person here with a cascade system?

 

I think you might be.  How much energy do you use when it's cold, i.e. as in mid-December? Have you got near your 16.5kW design power?

@kev-m Hi Kev.  Not sure how to calculate that.  In the cold week at the start of December (0 to -8 C all week) the HP system drew an average of 70 KWh per day peaking at 105 KWh.  The house was reasonably warm all that time and I did not have the sense that the ASHP were near their limit to supply energy (though some rads should probably be upgraded) One of the issues I have is that there does not seem to be a measure of output energy in this system.  The standard Ecodan system does show output but apparently the cascade does not!

@tommcl 

I didn't know the cascade system didn't give you the numbers.  105kWh at a COP of 2.5 (what I got in the cold snap) is a constant 11kW (105*2.5/24) over 24 hours. 

What flow temp are you using?  

Ok So here is where I need a better manual.  The Summary Settings screen says 45C.  Melcloud says the flow temperature is 50C when the room thermo is calling for 20C (actual 18.5), but then drops to 42 When thermo at 18C (actual 18) and 25 when the thermo at 16 (actual dropping towards 17).

If I try to get to the point to set the flow temperature by working my way through the screens on the controller I get to a point when the controller asks if I want to shut the system down.     Should I say yes at this point?

Manufacturer:Mitsubishi 

Model: 2 x 14kw Ecodan R32

Type: ASHP

Arrangement: Cascade

Area of Country: north Staffs

Home Type: House detached 

Size: Square Metres:485

Insulation Level: 8

Heat Loss Calculation: 23 kW 

Type of Controller: Salus with in room thermostats x17 

Type of   Control : flow temp plus room stats with smart learning 

System Type: UFH 

Total Output of Heat Emitters: 

Buffer Tank or Low Loss Header: BT

Secondary Pumps: Number 6

Solar PV System: not yet

Power Diverter: 

Battery System: not yet

Just adding in my details here, or as much as I can remember/look up!

Forum Handle: Bob77

Manufacturer: Daikin

Model: Altherma 3 R F, 8 kW (ERGA08EAV3A outdoor unit, EHVH08SU23EA6V indoor unit)

Type: ASHP

Arrangement: Split, low temperature

Area of Country: Hampshire

Home Type: House

Size: 117 sq m

Insulation Level: 7? Insulated cavity walls, 1960s house with extension to 2022 regs

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

Type of Controller: 2 thermostat zones to UFH downstairs, 1 thermostat zone for 3 bedrooms + TRVs

Type of Control: Weather Compensation plus thermostats

System Type: UFH downstairs, radiators upstairs. Plus legacy electric rads/UFH in bathroom and WC

Total Output of Heat Emitters: 5.52 kW

Buffer Tank or Low Loss Header: LLH

Secondary Pumps: 2

Solar PV System: No

Power Diverter: No

Battery System: No

BTW will the forum name ever be corrected from "heap pumps"? 🙂