ASHP Advice: High Temperature vs. Low Temperature Heat Pump For Microbore
I fully agree with James that a HT heat pump will probably be no more costly to run than a LT heat pump when operating at the same LWT.
If the reason for installing a HT heat pump is because a LT heat pump would not be able to supply LWT at sufficiently high temperature to meet demand, then a HT heat pump is likely to be more expensive to run.
This is why improved insulation, larger heat emitters and other ways of lowering the required LWT should be the primary objective.
As I have stated repeatedly 'if you don't require the thermal energy in the first place, then it is not necessary to produce it'.
Hi - we have a Daikin 16kW HT ASHP installed which was the choice of our builder when we did our renovation. We heat around half the (300 sqm detached) house with 7 new aluminium radiators averaging 1.5kW each at T40, and half with wet UFH. The radiators have a mix of 10, 12, and 15mm copper piping which is connected to a Caleffi coplanar manifold which results in each radiator being on its own loop. Our LWT on the coldest days in winter is around 45C, and the house is a constant 21C in winter. The only time the system uses the HT functionality as far as I can see is the weekly legionnella cycle (to 60C). Total grid consumption for the year is around 11000 kWh with solar consumption adding around 5000 kWh. After four years of ownership, I think we probably could have gotten away with a LT system but we are happy with the HT system overall, skinny piping and all.
- 26 Forums
- 2,118 Topics
- 46.6 K Posts
- 43 Online
- 4,523 Members
Join Us!
Latest Posts
-
Watched the latest homeowners qa and they mentioned som...
By AdamK , 9 hours ago
-
-
The sad end of my ECO4 installation.
This afternoon I was advised by a charity that was help...
By Dwynwen , 12 hours ago
-
RE: Replacing Refrigerant on Mitsubishi Heat Pump
@davidalgarve It should just be recovered by both servi...
By dgclimatecontrol , 16 hours ago
-
RE: Who's your electricity provider and what's your tariff?
Aggregators have been recognised for many years, and it...
By Transparent , 16 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
Great news I edited my previous post (probably af...
By JamesPa , 20 hours ago
-
RE: Double or Triple Glazed Windows?
@toodles Glad to hear things are progressing well for y...
By TRBob , 20 hours ago
-
RE: 300 Liter Tank - Do I have to heat it all?
I agree with @morgan. You can turn down the target t...
By JamesPa , 22 hours ago
-
How to waste energy (and time) playing with AI.
A friend of mine who subscribes to an AI service was ex...
By Toodles , 2 days ago
-
RE: Heat Pump Books For Beginners – Bodge Buster & From Zero To Heat Pump Hero
@topher you’re more than welcome to, yes. I’ll send you...
By Mars , 2 days ago
-
RE: Fitting new shower valve ..........
I’ve never taken a chance when fiddling and changing ou...
By Mars , 2 days ago
-
You should contact the council and report the unsatisfa...
By JamesPa , 3 days ago
-
RE: Benefits of an extra horizontal loop for GSHP
I would deffo install an additional slinky run, especia...
By Transparent , 3 days ago
-
RE: Say hello and introduce yourself
@editor fab - thanks Mars, and keep up the great work o...
By normpang , 3 days ago
-
RE: Compressor and Evaporator Stratification
@trebor12345 So I think the 1st zigzag section shows so...
By ASHP-BOBBA , 4 days ago
-
RE: Is this just haze or something more?
@majordennisbloodnok I was giving a talk to primary sch...
By Toodles , 4 days ago
-
RE: Tesla Powerwall – More of a ‘Luxury’ Than an ROI Winner!
We had our Tesla Powerwall 3 (and Gateway) installed ea...
By Old_Scientist , 4 days ago
-
Indeed. With a battery its presumably the battery con...
By JamesPa , 4 days ago
-
RE: No-code, plug-and-play monitoring for your heat pump
To update an ESP device using ESPHome in Home Assistant...
By Grantmethestrength , 5 days ago