MVHR ASHP DHW SOLAR UFH FAN COILS

[Nic]

Working together as a team !

 I know a little about the above …but building a small 110m2 ( passive based) house see attached . I know what I’d like but can’t seem to find anyone who can design a whole system ( I get the “we only do ashp or we only do solar or only MVHR” etc) 

 

I’m going to be building in Devon .
Anyone know someone who can look at it holistically and make sure everything works together? 
 

looking at a single zone for UFH ground floor ( primarily all open, so keep it simple) solar panels on the south side of the roof, to do electrical and DHW if required . I like the Panasonic ashp compact J type and the zhendar  q 350 ( in a small loft) a DHW cylinder 180-210 size( three of us, two like baths) fan coils for bedroom? For summer cooling, cool the slab for downstairs in summer .internal dimensions are 9300mm x 6000

kitchen and utility have change slightly but no drawings yet for that 

 

we will have an insulated raft  foundation and triple glazed probably blown cellulose 

 

planners were a pain in the !!! So we have what we have and need to work with it 

 

id be grateful for any recommendations on someone to look at this and make sure the builders ( or installers ) know what’s what and a plan to work to 

 

 

[Dave Jones]

you basically have the same setup we have. 

 

panasonic aquera

Zehnder Q350

UFH loop

fancoils ran off UFH loop.

towel rads with electic element and smart breaker to control them all at same time.

 

you could lose nearly all the kit under your stairs i would think. Pozi joists 305mm no smaller or you wont get the mvhr duct in, and dont do what I did and fit the pozi's thinking i could get the ducting in after, you cant! poke in the lengths of tube as you go and cut them to fit later.

 

Also look at tile vents if you have accessible roof space for the mvhr intake/exhaust to save punching unsightly holes in the walls.

[JohnMo]

2 hours ago, Nic said:

Working together as a team !

MVHR is just ventilation, leave it to get on with ventilation, no heating or cooling coils, they work a bit, but not really worth the faff and huge cost.

 

Solar PV, again pretty much leave it as stand alone, ASHP and MVHR will naturally use any electric before it gets exported. Install a diverter to immersion if you don't get paid for export.

 

ASHP leave it to do either DHW or heat and cool via a 3 port diverter.

 

That gives 3 stand alone projects, nothing is lost in translation, all should be pretty basic installs.

 

And everything @Dave Jones said.

[Nic]

Zehnder ComfoAir Flex250 …….Not the

350 

[Alan Ambrose]

>>> dont do what I did and fit the pozi's thinking i could get the ducting in after

 

You didn’t like the flexible duct?

[Dave Jones]

22 hours ago, Alan Ambrose said:

>>> dont do what I did and fit the pozi's thinking i could get the ducting in after

 

You didn’t like the flexible duct?

 

its poor substitute to rigid steel.