Chilled Water AC System
hi all. if any one can point me in the right direction. im looking for a water chilled air handlers for domestic ie same as wall hung ac unit except using chilled water instead of gas as i have ecodan ashp and i belive can chilled water.
I think what you're talking about are Fan Coil Units or FCUs. They're basically a pipe with metal fins to transfer the heat, with a fan to blow air through them. There is additionally a condensate drain pipe to collect moisture that comes out of the air as it cools.
You can get them in ducted versions, which fit in a service space somewhere and the cool/hot air is ducted out (if you've been in a modern hotel room with A/C you may well have had one above the hallway), in cassette versions that fit in the ceiling (like in shops, offices, etc), and in wall hung units that are either mounted high (like an internal A/C unit, but with water) or low (like a radiator).
They are a bit unusual outside of commercial settings in the UK, but they're popular in other countries such as Italy. This thread has likes to various models and sources:
(I'm looking to replace a couple of radiators with FCUs and pondering ordering from Italy or China...)
With your Ecodan, you would need to enable cooling mode and typically water would come out at 7degC. Then your heating loop becomes 'cold'. Depending on how everything is plumbed, you might need a separate zone for just your FCUs or to change your radiator/UFH controls (with mechanical TRVs, they may decide the room is too hot and stay closed. When the temperature is cooler than their set temperature, they decide to open to allow more water into the radiator to 'heat things up' - which of course will cause the room to get colder. So you can't have useful thermostatic control). You would also need to ensure your internal pipes are insulated otherwise they're at risk of condensation.
One thing to take in to consideration when using chilled water is condensation.
All of the pipework must be very well insulated without any gaps, anywhere warm air contacts the now chilled pipework will cause condensation and drips. With heating you can get away with this but with cooling it can cause water damage is inaccessible places!
But otherwise a good way to cool a property, especially if you can get a central FCU and ducting to make is almost silent.
hi. i have been looking at this but cant find any where on web that sell this???
You will probably need to talk to distributors, since they aren't typically a part stocked in everyone plumbing warehouse. Orion Air Sales have the FWT-CT, for example (I'm not clear on the difference).
Otherwise Italy is a good source (search 'ventilconvettore'). ShopClima have the FWT-GT, and will ship to the UK (or would last year before Brexit border checks):
- 22 Forums
- 2,084 Topics
- 46 K Posts
- 24 Online
- 3,378 Members
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
@editor Mars if you have any recommendations for down s...
By abam48 , 12 hours ago
-
RE: Surface mount or bury primaries for heat pump installation?
@tomasmcguinness HI, The rules is a best practise, the ...
By ASHP-BOBBA , 15 hours ago
-
RE: Vaillant AroTherm Plus 7kW
@scalextrix if your under unit heater is like our Myson...
By Judith , 17 hours ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@cathoderay how did you get a script to run for that- d...
By benson , 18 hours ago
-
RE: Renewable Heating Hub Homeowners' Q&A Podcast
@ashp-bobba thank you, and equally so, thank you for ta...
By Mars , 2 days ago
-
@judith good to know… I’ll continue to feed Wattson, an...
By Mars , 3 days ago
-
RE: My misgivings about installing ASHP and solar panels via the ECO4 scheme...
@editor great article re accreditation. I note ISO/IEC ...
By Bart , 3 days ago
-
RE: Renewables & Heat Pumps in the News
Here’s a little more technical detail/p>
By Judith , 4 days ago
-
RE: Who's your electricity provider and what's your tariff?
I don't (yet), but my PW3 is due to be installed shortl...
By Old_Scientist , 4 days ago
-
RE: MCS and NAPIT complaints process
@chrislay, is your heat pump complaint still unresolved...
By Mars , 4 days ago
-
RE: ASHP Install from hell - help please
@saf1973 I’ve been going through old cases on the forum...
By Mars , 4 days ago
-
RE: RDSAP10 effect on existing heat pump EPC rating?
@aaron There's the rub, the database does not list my ...
By AF1 , 5 days ago
-
RE: Commencing on an ASHP Installation Process
Yes, it's "doable" if everything goes to plan, they arr...
By Old_Scientist , 6 days ago
-
RE: How not to install a heat pump
You are right. Thinking on this has evolved over the p...
By JamesPa , 7 days ago
-
RE: DHW SET UP with Samsung gen 5
Thats good news indeed, you are very likely almost ther...
By JamesPa , 7 days ago
-
RE: Plate heat exchanger considerations
As far as I can tell my vented system would have a peak...
By Scalextrix , 7 days ago