heatpump — boards.ie - Now Ye're Talkin'

My Irish Heat Pump Odyssey - high SCOP monobloc install Heat Geek/Urban Plumber style

marcexec — Fri, 27 Mar 2026 19:58:58 +0000

Content warning: I compulsively over-research and am probaly addicted to the Heat Geek & Urban Plumber YT videos.

I'll document my experience with installers that I have for what should be the crowning upgrade to our house and probably have a bit of a rant as well.

The objectives:

True monobloc unit to minimize noise as the DHW cylinder and boiler are in the master bedroom.
System designed for a flow temperature of 45°C or lower
Open-loop system with no buffer tank
External monitoring for https://heatpumpmonitor.org/

Property:

1960s ex-council end of terrace, 115m2, MVHR (DIY'ed by myself)
5kW heat loss, have (DIY) heat loss calculation with Heat-Engineer.com
~10m pipe run to preferred location on top of kitchen extension
BER B1, HLI is 2.206 W/K·m2, so SEAI grant is possible
Relatively new condensing gas boiler from the Warmer Homes scheme
Radiators are mostly P+, so some will need to be replaced
5 people, ~200-250l cylinder for DHW
This will coincide with a dormer extension & chimney removal in the attic, so more intrusive works can be accommodated

From my research, the best option would likely be the refreshed Vaillant Arotherm Plus: https://renewableheatinghub.co.uk/forums/renewable-heating-air-source-heap-pumps-ashps/new-vaillant-arotherm-plus-in-black-when-will-it-come-to-the-uk/ , but others like

Daikin Altherma 4 MT, Samsung EHS Mono R290, Ideal HP290, Grant Aerona R290, Panasonic Aquarea L or even the Midea M Thermal Arctic (R290) should be OK. It has to be supported afterwards and I guess we're all used to a bit of compromise for being at the end of the supply chain…

Method:

I contacted installers that are SEAI registered, have a website and some reviews, don't just promote boilers and are close by
they got a version of the property details above and documents like the BER and HLC
I'm (naturally) tracking them in a spreadsheet
some only focus on brands that don't tick the boxes (like indoor units with the circulation pump), I tried to exclude them
others don't "have capacity" (likely not doing domestic installs), which is fair - so far #4 & #14

Daikin heat pump and weird water tank temp drop

sharkufc — Fri, 21 Feb 2025 14:52:06 +0000

Hi all,
I have a Daikin heat pump quite recent (model ebvh11s23dj6v installed in May 2023) with a 230lt tank. I've noticed a weird trend where the water temperature sometimes dips to 30-35 degrees and obviously if you go have a shower all you get is cold water.

I noticed this happens even more often when I do a bath to my kids more often. More precisely when that happens I don't fill the bathtub fully (ofc) but only a 15-20 cm.

The original temperature was set 50 degrees, so I tried to increase to 55 but with no luck.

I wonder if this is the normal behaviour or I should be worried that something is happening. You can see below I have the tank temperature recorded and, although the drop has always been there, it got worse recently.

Anyone with some experience and/or technical knowledge can suggest what to do?

For the laugh, I've asked chatgpt at how many degrees should the tank temp be after I fill half a standard bathtub with a 230lt tank with a 50degrees temp inside and here's its answer

The water tank temperature will decrease from 50°C to roughly 46,1°C

Asking here as Daikin doesn't have a good warranty support as you have to call in external companies that charge around 200 euro and I'm pretty sure they will get in and say "all looks good"..

Glycol leak in domestic air to water heating system - no hot water

shanoh — Sun, 12 May 2024 12:45:59 +0000

Anyone got advice for who could fix a leaking Joule system? (Apparently Joule don't do service jobs)

I heard a bang and leaking water sound and found a pipe had disconnected from the device above it (white pipe in the middle isn't attached to brass fitting in photo). The blue glycol poured out and came through ceiling below. Thankfully there was a socket below it which tripped the switch when it got wet and shut down the system, or it would have been much worse.

We moved in 2 years ago and no trouble up to now, but with this we are now without hot water. I could try and just pop it back in but worried it would just leak again. Who usually fixes these things, as we need the whole system serviced as pressure may be too low now too.

heat pump and pv solar panels

westmeathDude — Fri, 06 Jan 2023 14:13:36 +0000

Hi All

Just looking for some feedback about a company I'm considering to use to get daikin heat pump and longi solar panels installed, they are called "east coast energy" but parent company is "Mulvany Electrical Contracting Ltd" based in Meath - quote I got for both heat pump and solar panels is good and wanted to know if any of you has ever had any dealings with them.

Thanks for your time

Heat Pump Service Specialists - Dundalk

ShiverinEskimo — Tue, 13 Dec 2022 22:20:36 +0000

I'm in dire need of someone to figure out issues I'm having with my heat pump and underfloor heating system located just outside Dundalk. It's been acting up for a while but the current cold snap has us essentially without heat or hot water. The plumber who installed it 10 years ago has since retired.

Can anyone recommend a good servicer of heat pumps in the area?

High temperature heat pumps, any experience?

realmoonunit — Thu, 25 Apr 2019 10:45:33 +0000

We are looking at an older property and ideally we will replace the old oil boiler with a heatpump (air to water) I have seen a couple of the high heat output pumps but wonder if they are any good.

We will also be installing a solar roof system with an aim to reduce the houses foot print as much as possible. The house will need a re-plumb and rewire so we figure that we had better do all the core work while we have boards lifted. Ideally a new highpressure system and zoned heating.

The house we are looking at is 3 stories, 2 over basement (half underground) and we want to make it as comfortable as possible with as small as possible running costs. House is c 1870. Down the road we would like to install original (cast iron) rads that would suit the property. We would also like to install a stove, if possible with back boiler so when we do light the fire it can assist to heat rads / water.

We will endeavor to bring the house back to its original state with the modern tech there but not highly visible.

Anyone in the know that could throw some ball park figures at the items listed below?

House is 2500 sq ft.

1. Replumb to include larger hotwater tank and high pressure system.
2. high heat output air to water heat pump.

We will also in time replace all the crappy aluminum windows to timber sash (cost is a factor here) and will take full advantage of seai grants available.

I will do a lot of the dog work myself in the property when it comes to the rewire (i.e. pulling cables and lifting boards, chasing walls etc) to keep the cost down. I will also be running a full data network to facilitate future modernization.

Any thoughts appreciated

re Neura heatpump

richardwhl — Thu, 23 Oct 2014 01:20:13 +0000

Hi, the electricity went off the other day and when it came back on my heatpump wasn't working right.
It keeps saying that the temperature has been reached, yet it shows 17 degrees.
When I turn up the thermostat the system calls for water but nothing happens.
The pump turns on, but there is no water going through the pipes.

I would be grateful for any help

Heatpump in Offaly

Havov — Wed, 01 Oct 2008 18:29:12 +0000

Hi All,

First of all, I am quite new to this messaging. I bought a heatpump from a company in the midlands, being less than happy with the service, I wondered what are the possibilities to get the system serviced as they seems to be the only importer of Thermia heatpump. Any idea welcomed.