I'd think long and hard about a Sanyo air to water.... In the event of a compressor failure you will need a new unit, I spoke to Sanyo with a view of training for repairing them....
Sanyo have only had 4 compressors fail world wide.
If the compressor fails you don't and cant repair them,the outdoor unit is removed and replaced by sanyo and only sanyo. The faulty unit is then quarinteened and sent back to japan.the factory in japan is the only place that can test and identify the faults within both stages of the compressor.
The compressor is the only one o it's kind,patent held by sanyo and with out this compressor technology no other manufacturer can get co2 heat pumps to operate correctly.
Anyone that tells you the install cost is high compared to other ashp is talking ****,its the same as any air/water heat pump except you don't need any fridge pipework between in and out,so a cost saving there.
The reality is it costs More to purchase the materials.3 times the price on average if you go for the acv tank.
As for cost compatability the only think its not cheaper than is gas,as an off gas alternative ashp will always win.what you have to understand is the difference between how hfc and co2 units operate through out the temp and pressure range.
the sanyo unit will produce useable heat through out its working range all the way down ast-26 to a cop above 2 at those low temperatures,a HFC unit by virtue of the refridgerent will start a dfrost cycle a 7degc, any lower and the unit will use all its generated heat just to stop it self freezing.HFC only produces transferable heat during 2 period of gas transision and will there have a lower cop as at a certain point the heat production becomes stagnent whilst the gas is inbetween stages.
as a domestic product the sanyo is way over priced and wont take off,commercialy its in a league of its own.the technology isnt new,google eco cute for the first solution in japan, as a co2 product all supermarket fridges use co2 as the refridgerent for its cooling properties.the technology is so right its just the box cost that is scary,about £5600 for a 9kw unit and 500litre acv plus install.pipework between outdoor and acv is water so thats easy for a plumber,the inside is standard plumbing,no wonder the fridge guys are scared of it,good product,good cop and no need for a fridge guy.
If you have 25years in the AC indusrtry and you want another 25 then sanyo's products will take you to another level and add longevity,as well as their heat pump you should be looking at VRF ac heat pump units which have a useable waste heat by product whilst the unit is in heat or cool.Another first
