Advice on heating in a new build property

[slacky]

Hey guys

looking for abit of advice on my heating system in a house I’ve just moved into. Last week I had to bleed a few radiators which I thought was normal but today I’ve had to go round bleeding them again and there was quite abit of air in them. How often should they need to be bleed? The down stairs toilet needed bleeding first time round but now it’s stone cold but doesnt need bleeding. What could be wrong with this? Also a few radiators are hot to touch but if I put my hand over the top it doesn’t feel like much heats coming off them and lastly for a new build property it’s costing anything from £4-6a day for gas and the heatings only on a few hours a day but doesn’t seem to reach temperature. For a new build property it seems abit excessive my old house was built In 1960ish and didn’t cost this much to run.

any help would be appreciated

thanks

 

[centralheatking]

I’ve put all that in on both Stelrad and plumbnation calculators but get very different results

I have just put new heating system into one of my let’s so I know it’s adequate so did the sitting room on both the calculators you mention. The Plumbnation one is rubbish way too low, the stelrad is nearer the mark . I can use btu or kw but kw is easier to understand as it translates into 1 bar electric fires as a comparison. The stelrad one came up with 2.2kw I put in 3kw as I can always turn it down, always put in enough heat for very cold xmas day when the kids are up early and running around in pyjamas. That gaff has 3 bedrooms two bathrooms two reception ..kick space in kitchen rarely used.8 rads and 24 kw combi is just dandy. House comes up to heat real fast boiler rarely run above half unless it’s real cold. Centralheatking

 

[slacky]

just redone each room on the stelrad website which gave a few different results and then done the same on plumbnation but they havent got as many room types so just did what i could. Could you cast your eyes over it see if there about right before i show the builders

 

[Scott_D]

I have just put new heating system into one of my let’s so I know it’s adequate so did the sitting room on both the calculators you mention. The Plumbnation one is rubbish way too low, the stelrad is nearer the mark . I can use btu or kw but kw is easier to understand as it translates into 1 bar electric fires as a comparison. The stelrad one came up with 2.2kw I put in 3kw as I can always turn it down, always put in enough heat for very cold xmas day when the kids are up early and running around in pyjamas. That gaff has 3 bedrooms two bathrooms two reception ..kick space in kitchen rarely used.8 rads and 24 kw combi is just dandy. House comes up to heat real fast boiler rarely run above half unless it’s real cold. Centralheatking

2 bathrooms and a 24kw combi ?????

 

[centralheatking]

2 bathrooms and a 24kw combi ?????

One is just a bog and basin. Lecky shower as well. Deck mixer on the bath

 

[Scott_D]

One is just a bog and basin

Typical landlord job then

 

[ShaunCorbs]

Mr combi one isnt far off a mears Calc and the one I use for mine

but don’t be surprised as it’s a new build they’ve just shoved a heat pack in x amount of rads and no heatloss calcs done hence them not wanting to talk / send you there’s

bring your boiler temp down to around 65dc

 

[slacky]

Just downloaded the mr combi app (think that’s the right one) put in a few rooms I think I’ve done it right and the figures are coming back higher than both Stelrad and plumbnation results

 

[ShaunCorbs]

Just downloaded the mr combi app (think that’s the right one) put in a few rooms I think I’ve done it right and the figures are coming back higher than both Stelrad and plumbnation results

thats the ones I would work off then

now find the manufacturer of your rads and look up the outputs

 

[slacky]

Ive done that already if you look at the spreadsheet picture I posted a few posts up it’s all on there. Mr combi app doesn’t list all the rooms that the Stelrad one does so not sure when choosing kitchen/dinner, wc, ensuites and landing areas

 

[ShaunCorbs]

Ive done that already if you look at the spreadsheet picture I posted a few posts up it’s all on there. Mr combi app doesn’t list all the rooms that the Stelrad one does so not sure when choosing kitchen/dinner, wc, ensuites and landing areas

so which one your struggling on ?

 

[slacky]

Downstairs wc, kitchen/diner, both ensuites and 1st and 2nd landing areas. The Stelrad didn’t have an option for ensuites but it covered everything else

 

[king of pipes]

Slacky this post has gone on for quite somtime now and i think the conclusion is your boiler and rads are undersized the only way to improve your situation is get a decent engineer in to upsize some of the radiators this may help but you may also find the boiler may also need looking at , it should not happen in a new build property but in reality it often does as the developers squeeze the heating contractor on price , you will carry on going round in circles getting nowhere and before you know it another 6 weeks will have gone by sit down write a list of things your not happy about and address each point . Regards kop

 

[ShaunCorbs]

Downstairs wc, kitchen/diner, both ensuites and 1st and 2nd landing areas. The Stelrad didn’t have an option for ensuites but it covered everything else

bathroom for wc
Kitchen / diner both are in the mr combi app
Landing use entrance / halls

 

[slacky]

I know it’s gone on far to long that’s why I’m trying to get right size btu for each room so I’ve got abit of evidence that what they’ve installed isn’t good enough. There’s a lot of contrasting information on the internet regarding the btu needed for different rooms that’s why I’ve asked here as you guy do it day in day out I thought you would be the best people to advise. I don’t see why I should be paying anything to get the rads upgraded or boiler looked at when I’m paying a lot of money for the house
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I take it when it asked for external wall I put the lengths of both walls added together? And ensuites as bathrooms?

 

[ShaunCorbs]

I know it’s gone on far to long that’s why I’m trying to get right size btu for each room so I’ve got abit of evidence that what they’ve installed isn’t good enough. There’s a lot of contrasting information on the internet regarding the btu needed for different rooms that’s why I’ve asked here as you guy do it day in day out I thought you would be the best people to advise. I don’t see why I should be paying anything to get the rads upgraded or boiler looked at when I’m paying a lot of money for the house
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I take it when it asked for external wall I put the lengths of both walls added together? And ensuites as bathrooms?

correct total outside wall length and correct

 

[slacky]

And flow and return I’ve put 80 65?

 

[centralheatking]

I know it’s gone on far to long that’s why I’m trying to get right size btu for each room so I’ve got abit of evidence that what they’ve installed isn’t good enough. There’s a lot of contrasting information on the internet regarding the btu needed for different rooms that’s why I’ve asked here as you guy do it day in day out I thought you would be the best people to advise. I don’t see why I should be paying anything to get the rads upgraded or boiler looked at when I’m paying a lot of money for the house
[automerge]1581884275[/automerge]
I take it when it asked for external wall I put the lengths of both walls added together? And ensuites as bathrooms?

Let us know how you get on with your builder when you present an expert report by a qualified heating engineer. Centralheatking

 

[ShaunCorbs]

And flow and return I’ve put 80 65?

doesn’t really matter but for condensing 65max then 50 for return

 

[slacky]

Let us know how you get on with your builder when you present an expert report by a qualified heating engineer. Centralheatking

no problem i get the hint i wont ask for any advice any more

doesn’t really matter but for condensing 65max then 50 for return

just did all the rooms using mr combi app again very different results compared to both stelrad and plumbnation. Thanks for the help

 

[king of pipes]

I totally agree with you but if the developers wont sort the issue out and you are getting fobbed off what are you going to do ? Post some pictures of rads fitted often its a simple job to swap a single panel rad for a double panel or double panel plus surley its worth considering in the rooms which are inhabited the most if it solves the issue you can the chase the developer for the costs . Regards kop