AHSP in Old House

[Home Farm]

Our air source heat pump has now been operational since the spring. It’s time to see how it performed over the course of the past three months as part of our autumn air source heat pump review.

To see how it performed over the autumn, including a very cold November, please check out this video.

[offthegridandy]

This is surely spam again. When you go to this blokes web site there is a advert for ASHP as supplied by a direct competitor to Navitron. I'm sure I've flagged this bloke up before he's taking the Peeess in my humble opinion.

Andy

[TT]

Are you advertising startomatic generators?
It's your email signature

[Home Farm]

Are you advertising startomatic generators?
It's your email signature

It’s not spam Andy. Sharing relevant content with users on this board that are interested in ASHPs and renewable energy.

[regen]

Topic Summary
Posted on: Today at 09:09:05 PM Posted by: Home Farm
Insert Quote
Quote from: TT on Today at 08:34:08 PM
Are you advertising startomatic generators?
It's your email signature

"It’s not spam Andy. Sharing relevant content with users on this board that are interested in ASHPs and renewable energy."

And hoping they will respond to your adverts prominently positioned on your website! ASHP+old building+wet wales don't mix very well!

[TT]

Ah someone else  promoting other non navitron products

[Home Farm]

This is merely a hobby and thought it would be of interest to people here, which it’s clearly not. Message received, and will no longer post here.

[rogeriko]

You say you are heating your entire house with 100 pounds a month electric, thats 22 kilowatt hours a day times a cop of 2.5 equals 55 kilowatts of heat per day. If I came to your house and plugged in 2 or even 3  one kilowatt electric heaters your house would be freezing. Remember energy cannot be created or destroyed. You cannot heat an old victorian farmhouse with an air source heat pump. I hope you kept your oil boiler connected for the next 3 months because you are going to need it. Air source heat pumps do not work in old wet Welsh houses.

[GarethC]

Air source heat pumps do not work in old wet Welsh houses.

Why not, if heat pump and emitters are sized correctly?

Also, presume the wet comment refers to lots of freeze defrost cycles, impeding performance. I've heard this a lot, but seen no empirical evidence sizing it. Can anyone point me in the right direction?

[Countrypaul]

If you read his web site, he indicates that for October with an average temperature of 11C they used 900kWh of electricity for heating and achieved a COP of 2.66 which cost him £130 in electricity costs. That equates to about 80kWh per day of heat and about £4.50 per day. The electricity used includes a proportion from their PV system. I assume his £100/month is the average cost and not that over winter. An 18kW ASHP would easily produce 55kWhrs of heat (in about 3 hours) so would seem to me to make little sense in having one that large if only used for 3 hrs - it would only run for about 10 mins per hour average.

The house appears to use bottled gas for cooking and also has two WBS for heating (as well as the ASHP) something I would have though is esential as a backup in case of severe weather and a power cut.

A quick scan of his site seems to suggest he reviews everything, all DY gadgets and even down to work gloves (though I didn't bother to read these).

It seems a little strange that we have some on here telling him his system won't work just by looking a set of possibly unrepresentative figures. It should be intresting to review things next spring once he has completed a winter, where it may be possible to say "I told you so", or say "well done".

[TT]

Who says the old Victorian farmhouse hasn't had extensive insulation work done?

I've enjoyed watching his videos, better than watching the person fest here

[offthegridandy]

very sorry if I've got this wrong but I've always assumed that as a courtesy to our (free) hosts that we do not abuse the Navitron site by promoting products that are in direct competition to our host. https://myhomefarm.co.uk/air-source-heat-pump-efficiency-and-performance-reviews. this link to the my home farm site is clearly an advert as it specifically mentions a price reduction for using his site. Ie £200 quid off and an Amazon ticket, sorry but in my book that is spam javascript:void(0);

Whether his installation is good or bad or feasible or if his data is reliable is irrelevant, the post is not in the spirit of which Navitron has operated for many years.

Andy

[TT]

Yawn
 

[benseb]

IMO banning people from talking about competing products is nonsense

If the Navitron products are good then people will buy them. Banning talk of all other products doesn’t mean they stay a secret. People do their research anyway. Why not allow an open and frank discussion which benefits everyone

And yes you can heat a big old farmhouse. Ours is 250sqm, built in 1800s. No DPC. 15kW Mitsubishi Ecodan. You just size things correctly.

[ecogeorge]

IMO banning people from talking about competing products is nonsense

Discussion is fine , using a free forum to promote a competitor product is not. Be fair !