Pump Sizing

[Chester]

Hey guys long time since I have posted here but know some of you know your salt. I've got a job in a townhouse and currently the boiler sits on the second floor of a three story but I'm moving it to the ground floor as per client request, problem is, its got ridiculously high ceilings, I'm going to double check but suspect at the very least top floor rads are 7 meters up.. so I'm concerned about a standard 15/60 or whatever being man enough, I've been looking at the 25/80 as a viable alternative but I'll be honest I really don't have a great deal of experience in pump sizing, I'm usually just whacking in combis and forgetting about it 🥴 so I keep hearing that it'll make the system noisy and all these horror stories, just wondering if anyone could give me some advice basically. Current system is 22mm flow + return, currently open vented, 10 rads overall, I'm going to seal it and putting in a 180l unvented indirect. Also, client is a bit of an eco warrior so they want me to put in electric, electric boiler needs 12lpm minimum according to Mi's. Cheers

 

[Chester]

Here's one installed but as said very expensive to run did the job on a off grid holiday home added a nest for smart control on the heating side left the hot water on a Honeywell programmer

Lovely mate, pre plumb stelflow, I'm going to go pre plumb aswell the time saved is worth the extra 80 quid or whatever in my humble opinion

 

[Timmy D]

Have they got space in the consumer unit for another breaker?

Who’s running the electric?
Are you competent?
Potential extra cost?
Is there a route for the new supply?
Depending on the route, you could be looking at a 16mm cable.

 

[Chester]

Have they got space in the consumer unit for another breaker?

Who’s running the electric?
Are you competent?
Potential extra cost?
Is there a route for the new supply?
Depending on the route, you could be looking at a 16mm cable.

Electrician
yes
yes
consumer unit in the same room as boiler

 

[cjg]

ps. don"t forget plug the electric car in to charge (lol)