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Vaillant AroTHERM Plus Quotes Seem Inflated – Am I Being Overcharged for Controls & Installation?
I was not expecting product labelling in the ASHP industry to be so obfuscated. Are these products not meant to have been assessed specifically on energy efficiency (for consumer awareness) and MCS "best practice" fitting?
I was not expecting product labelling in the ASHP industry to be so obfuscated. Are these products not meant to have been assessed specifically on energy efficiency (for consumer awareness) and MCS "best practice" fitting?
These are a bit hard to read but the information is in there.
Yes, thanks. Bosch 5800 is here. My point is about the product naming. Essentially a 7kw Vaillant is acceptable to installers for our home but a Bosch engineer did not think the Bosch 7kw would be powerful enough (and I said I would need 6-7kw).
They provided a new design using the 5800. It does not use a buffer but has a wall unit which I am not clear if it isolates the rad flow from the ashp flow. My guess is that it does, since it needs an additional pump for the rads.
Below is the table with the bill of materials:
Product, Description, Part Number
1* Bosch compress 5800i 7kW 1P ASHP The Compress 5800i AW is a high temperature heat pump system that uses R290 as a refrigerant. 8738213466
2* Intatec Gate Valve Bore valves are used to control the flow of water, allowing for isolation and maintenance HPBV114X2
1* Intaflex Pre Insulated Heat Pump Hoses - 1" BSP F Swivel Elbow x 28mm Comp x 750mm Pair A flexible hose used for connecting the outdoor unit to primary pipework. It will reduce vibration through pipework. HPHOSE750B
1* Diversitech Flexi Foot Kit Anti-vibration feet serve to reduce vibrations and noises that occur during the operation of the heat pump. FF-600-S150-KIT-TBOLT
1* CS5800i AW E The all new 5800i AW wall hung unit brings simplicity and technology perfectly together. 8738214990
1* Greenstar system filter 28mm Magnetic filter to remove debirs and protect the system 7733600237
1* Heating circulation pump Pump after a buffer to circulate system water Third party
1* Bosch CANbus cable 15m The CANbus cable allows for communication between the outdoor unit and the indoor unit 8738206183
1* DHW cylinder sensor Temperature sensor for hot water cylinder 7735502289
1* Bosch CR20RF wireless Wireless room thermostat, which works alongside the Connect-Key K30 (included with CS800i AW E) 7738112943
1* Telford Indirect Heat pump cylinder TSMI300/HP
8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC
They provided a new design using the 5800. It does not use a buffer but has a wall unit which I am not clear if it isolates the rad flow from the ashp flow. My guess is that it does, since it needs an additional pump for the rads.
It might be a 'split' rather than a monobloc. That's where some of the functions are put in a separate box. There are various ways to split but the most common are hydrosplit, where all the refrigerant bits plus the heat exchanger are outside, but the rest of the hydraulics are inside, and a split where the compressor and heat exchanger are inside in addition. The diagram suggests it might be a hydrosplit in which case there shouldn't be a water pump in the odu.
That's odd and concerning. Unless the pipework between odu and idu is refrigerant not water then that suggests system separation with all that goes with it
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
That's odd and concerning. Unless the pipework between odu and idu is refrigerant not water then that suggests system separation with all that goes with it
The heat exchanger is my guess, as I cannot see what else could allow a third party pump in the rad circuit.
8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC
They provided a new design using the 5800. It does not use a buffer but has a wall unit which I am not clear if it isolates the rad flow from the ashp flow. My guess is that it does, since it needs an additional pump for the rads.
This spec already saved some time. An estimate that caught my eye was (after I shared the Bosch spec..) quickly replaced by another joining the long tail of fantasyland offerings.
It's unfortunate that Bosch was not able to fit everything (like the circulating pump) in the external unit. It seems the more is left for the installer, the less affordable the models will be.
The installer guide here suggests that the ODU has no pump and the IDU has a pump but, so far as I can see, no heat exchanger. So its just like a monobloc but split over two modules
Several heat pump manufacturers split this way, a variety of packaging options makes sense to fit a variety of available spaces. Its just a way of differentiating.
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
The installer guide here suggests that the ODU has no pump and the IDU has a pump but, so far as I can see, no heat exchanger. So its just like a monobloc but split over two modules
Several heat pump manufacturers split this way, a variety of packaging options makes sense to fit a variety of available spaces. Its just a way of differentiating.
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
Several heat pump manufacturers split this way, a variety of packaging options makes sense to fit a variety of available spaces. Its just a way of differentiating.
Differentiation makes sense, but so would including the rad circulation pump...
8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC
Differentiation makes sense, but so would including the rad circulation pump...
I guess it depends on whether they can pack it into the space without creating another case size. Also leaving the water pump out gives the installer the option to fit a more powerful one in marginal cases. Horses for courses!
