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Happy to post stuff without checking any facts then.
Proposed new boiler
- Thread starter transam
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D
Deleted member 294929
Who else should pay it Roy?
Are you suggesting Transam or any other heating engineer should suck th cost for every installation of a boiler?
D
Deleted member 294929
In a house they are designed for then they are effective. Most of us don't live in such houses.
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It's not efficient when you realise that the heat pump is not enough to do the job you installed it to do.
Excuse my ignorance, but being 300% efficient doesn't it mean that it produces more energy that it uses?
How is that possible?
By moving /extracting energy that exists elsewhere.
The overall sum doesn't contradict the laws of physics; it's just that [you] only put in X amount of energy, to get 3X energy back........
Someone might tell me different, but I suppose in some ways, a wind turbine has near-infinite efficiency (if calculated in certain ways).
In that, it takes basically no power to "run" it but, on a windy day, it generates kilowatts of power............
In that, it takes basically no power to "run" it but, on a windy day, it generates kilowatts of power............
Massage the figures
Used to be one manu claiming there gas boiler was 106% efficient in there advertising bumpf
Play with the maths ?? I recall years ago some thing about calculating efficiency via wet gas or dry gas
And you get different efficiency figures ???
Afai recall the Uk altered the way it calculated gas boiler efficiency figures years ago so as to alone with EU ?? Standards this caused the efficiency figures to go up ???
It works like a fridge in reverse. The heat pump takes in energy 2*X, adds (electrical) energy X to it, and outputs 3*X. That's how they claim 300%. But it doesn't break the laws of thermodynamics.
By using the lower calorific value (LCV) of the gas for the boiler input. LCV assumes the water produced stays as vapour. But the heat output on the basis of some condensation, so recovering the latent heat. Giving efficiciency > 100%.
when they should declare a CoP Coefficient of Performance.
Some Air Sourced Heat Pumps lose the heat produced in the electric motor driving the air mover in the out door unit.
Agreed.
If I remember right you're also pretty hot on debunking the > 100% claim. It hasn't been discussed on here for a while. Don't know how they manage to clain 127.6%. Double dutch?
Boiler I was thinking of was the Ravenheat CSI primary heat only boiler
Was still being sold recently untill there fairly recent liquidation in the UK
Non pre mix boiler ( atmospheric combustion with there patented secondary heat exchanger / recouperster )