Thread: ASHP running costs

Hi All,

With the forum being rather quiet this time of year, I thought I would see if those with ASHP's would be willing to comment to the questions below, to give those without them, including myself, an insight into how people are finding them coping. I'm curious how they are performing.

With the current weather having been with us a few days now, and low daytime temperatures looking to stay with us for a few days more, I was wondering how those running ASHP are finding them coping to maintain water temperatures.

Perhaps you could tell us a little about :

Where in the Country you live ?
Your pond gallonage ?
If there was any insulation used when building the pond ?
Is the pond covered ?
What filtration you have running ?
What make ASHP you are running ?
What size ASHP you are running ?
Do you run all year, or just over winter ?
What temperature you are maintaining ?
The Daily running costs ?
Anything other information you would like to include.

Regards

Clive.

Where in the Country you live ? South East
Your pond gallonage ? 3200+
If there was any insulation used when building the pond ? No
Is the pond covered ? Yes, late October to April, 25mm polycarb.
What filtration you have running ? Drum
What make ASHP you are running ? Thermotec
What size ASHP you are running ? 17kw
Do you run all year, or just over winter ? All year - 20C May, 22-23C June to September, Reducing 0.1C per day from October to December, currently 10.7C

What temperature you are maintaining ? Working my way down to 10C. Lowest ASHP can go (overriden from 10C) is 8C, but I want to keep wiggle room in case of power cut as the pump will not fire up if water temp falls below its minimum.

The Daily running costs My first year with ASHP (Since May) and changed electric supplier mid year so can't give accurate figures. I'd estimate a maximum of £30 per Month but usually closer to £20. Increased costs were more noticeable during cold spells in early summer where pump would fire up 2-3 times per day. Currently despite freezing ambient temps it is only coming on once every other day for about 3 hours each time. During warm spells between October and present time there were times when it didn't come on for a week, but remember I have been reducing target temp by 0.1C per day throughout that period.

My aim is to maintain comfortable temps during winter (10C ish) in the hope it stops the issues I get when temps start fluctuating wildly in early Spring, and then heat for growth throughout summer.

Before installing the ASHP my pond was terrible at holding temps. In the 2022 heatwave when we saw record 40C+ day time temps, my pond averaged 20 - 21C and only reached a high of 22C. On average this pond is typically 2C cooler than my previous ponds at any time of year, it really suffers from wind chill so I felt the ASHP was badly needed.

Where in the Country you live ?: Derby
Your pond gallonage ?: 3400
If there was any insulation used when building the pond ?: 1'' kingspan
Is the pond covered ?: Pond balls went on Jan 1st
What filtration you have running ?: Drum, bio & shower in filter house, second shower outside
What make ASHP you are running ?: Thermotec
What size ASHP you are running ?: 9kW (bought for a smaller pond, but is coping)
Do you run all year, or just over winter ?: all year
What temperature you are maintaining ?: 10C
The Daily running costs ?: No idea (better not to know ). But I do run solar and a battery which offsets costs.