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I had another heating engineer come over this morning. He examined each of the rooms, radiators, existing pipework and boiler. His recommendation was to go with a Vaillant ecotec plus 430 (30kW) or a Worcester Bosch 8000 35kW boiler. He strongly recommended an aluminium heat exchanger (as...

if you can provide any that you are aware of, that will be greatly appreciated

ok, I've got a couple of more heating engineering companies coming over in the next few days. I'm just baffled that from the ones who have already been, apart from one (who believes a 30kW boiler will be sufficient), the others of all suggested a 35kw - 40kW boiler. From the reviews these...

the way my central heating is set up. I only have one zone valve that controls all 21 radiators (even though the majority of rads have TRVs fitted), so when CH is on, all radiators will initally be on. Based on the info provided, are the Worcester Bosch 35kW and Vaillant 37kW both oversized...

as part of getting building reg permission for the orangery last year, I had to get a company to carry out a SAP2009 calculation to justify the heat loss as part of demonstrating compliance with Approved Document L1B (2010 Edition). I am not sure if this would cover the whole house heat loss...

From the calculations I have of the 21 radiators, it amounts to approx 24 kW (~82,250 BTU). I understand you generally allow for 3kW for HW but I'm not sure what the kW would be for the UFH. The UFH is heating a 6m x 4m orangery with plenty of glass, and the floor contains two loops of approx...

thanks @ianmcd. I have had quite a few registered heating engineers come over, and no one has mentioned they need to carry out a whole house heat loss calculation. You seem to imply that a 37kW boiler may be oversized. Excuse my ignorance but what do you mean by 'Priority domestic HW'? From by...

I currently have a Vaillant ecoTEC Plus 438 system boiler which is 13 years old. I have been having problems with the boiler which boils down to the heat exchanger so I am now looking to bite the bullet and have a new boiler installed. My set up at home is that I have a 4-bed detached with 21...

Thanks @Madrab. I’ve removed the plug but didn’t find anything inside to suggest a blockage. I think I’ll need to get in touch with Hangrohe to see what they suggest as I don’t have a wet vac.

I had my bathroom renovated back in 2017 and had a Hansgrohe Raindrain 90 XXL Shower Waste system fitted in the shower. Over the past few weeks, I have noticed the water draining very slowly to the point where the shower is becoming hard to use. I have used 'One Shot' drain cleaner which has...

thanks @DAZB. Yes, the builder will be coming back to fix the issue. For future proofing, I am looking for a paint in 'grey' rather than in silver. Is there a paint in grey that you would recommend?

Oops, photo attached

I had an orangery built last year that contains a roof lantern. All around the roof lantern is a flat roof. Whilst sweeping leaves off the flat roof, I noticed a small area where the paint had started blistering (see photo). I sent the photo to the builder who said he would come back to repaint...

I have attached a couple of photos showing the dirt on the wall. Would a 1:1 ratio of household bleach and water, along with a light jet wash be OK to use in trying to clean the dirt off the wall?

Thanks @kp00110 Is there any solution I could look to initially spray on before using a jet wash?

I had a new 20m retaining wall built last year in my garden. The face of the wall was coated with a light grey colour of Premium Bio Silicone Render. Due to splashback of rain water from the patio and general dirt, parts of the wall are dirty with dirt stains. I tried scrubbing the dirt off with...

I just noticed on the UFH manifold pump (see attached) that the green light is displayed on the first light which has the symbol of a 'radiator'. The second light, which is not lit, appears to show the symbol of an UFH system. Should the pump setting be on the 'UFH' symbol instead of the...

no problem @JonathanM. Am I experiencing this problem because I have a Vailllant boiler or would I have the same issue regardless of the boiler make/type? I am happy to change the boiler to either a Vaillant ecoTEC plus 637 (recommended by an engineer) or an alternative boiler if gets round the...

thanks @JonathanM. I would like to give your suggestion a go by changing the d.17 setting. However, since I do not have a d.17 status on my boiler, I need to scroll through to d.97 as you mention. If I scroll to d.97, you mention about a password. I am not clear on what you mean by this...

Thanks everyone. I have a system boiler and does not have a d.17 setting. @jeff the gasman - I have a 1970s 4-bed detached house with 3 living rooms plus the orangery (which is heated through UFH). The house is brick construction. Ceiling height is 2.3m with large, double glazed UPVC windows...