Boiler short cycling with low flow temperatures

[Temp]

@MrPotts

 

Is it possible to fit smaller jets to reduce boiler power? Not sure about gas boilers but that helped my oil boiler.

[marshian]

6 hours ago, Temp said:

@MrPotts

 

Is it possible to fit smaller jets to reduce boiler power? Not sure about gas boilers but that helped my oil boiler.

 

Nope not on a gas boiler but these days they modulate better than they did

[seanblee]

On 20/02/2025 at 15:11, marshian said:

 

Looks better

 

You can potentially avoid bigger rads by heating longer (ie 24/7 or with very minimal set backs outside of scheduled heating periods)

 

I was heating to a schedule and running 50 deg flow temps (at zero OAT) - to get the room up to temp within the schedule

 

Moved to 24/7 heating and I'm running 32 deg flow temps (at zero OAT)

 

Setbacks with recovery didn't seem to save any energy v a 24/7 heating period

 

Only proviso is the boiler needs to be happy at the lower flow temps

I'm going to give that a try for a few days and see what the gas consumption looks like - at the moment, it works quite hard from 4-5:30 every morning to lift the temperature, and whilst it's been around 5 degrees outside, we've been using 85kWh a day, which feels like a lot to me.

[marshian]

17 minutes ago, seanblee said:

I'm going to give that a try for a few days and see what the gas consumption looks like - at the moment, it works quite hard from 4-5:30 every morning to lift the temperature, and whilst it's been around 5 degrees outside, we've been using 85kWh a day, which feels like a lot to me.

if it feels like a lot it probably is but is house specific 

 

my daily for feb so far (4 bed detached heating 24/7 with room temps from 18 to 22)

 

the minus overnight temps are the peak days (70 kWh ish)