Central heating

Mgreen

Honeywell timer 18
Radiators on 4 or 5
Upstairs on 4 expect for one room
On from 12.30 to 3. Pm
Boiler temperture 63 degrees

Why does my house get cold

Vaillant Eco tech boiler

HappyMJ

Mgreen wrote: »

Honeywell timer 18
Radiators on 4 or 5
Upstairs on 4 expect for one room
On from 12.30 to 3. Pm
Boiler temperture 63 degrees

Why does my house get cold

Vaillant Eco tech boiler

The heating is not on long enough?

The doors and windows are open?

The natural (vents) or forced (fans) ventilation of your property is too high?

Poor insulation?

shegar

You only have your heating on 2.5 hours out of 24, = 21.5 hours without heating on, id say thats the reason why your house is cold..............

southcoastrgi

all of the above plus your room stat is set on 18 while your trv's are set on about 25 so they are never going to switch the rads off before the whole system shuts down, most people have their bedrooms on 1-3

Mgreen

Any suggestions on the right settings
How long does it take to heat up home to comfortable level. When I have the rooms on 3 it's too cold . I want them on 4 .

Mgreen

I also have trv where they room thermostat . I read that it should be on five and I should adjust the room thermostat. If its in low then the boiler would run continuously

southcoastrgi

Mgreen wrote: »

I also have trv where they room thermostat . I read that it should be on five and I should adjust the room thermostat. If its in low then the boiler would run continuously

you can have the trv's set on whatever you want it's your choice but most people want a cooler bedroom & only use the rads in rooms they aren't using to keep the chill off of the air which is why i said those settings, your rooms will never get upto no 4 because you have the room stat set on 18 & as soon as the heating reaches 18 the whole lot will switch off, you need to have the heating on for as long as it takes the house to heat to a temp you want, no one here knows how long that will be due to lots of factors, some people have it on for an hr in the morn then 4 or 5 hrs in the eve & some people have it on constant, you shouldn't have a trv on the rad where the room stat is so you either need to leave the trv on max, change it for a locksheild valve (which is what is should have had in the first place) or take the head of it off

reeac

Mgreen wrote: »

I also have trv where they room thermostat . I read that it should be on five and I should adjust the room thermostat. If its in low then the boiler would run continuously

TRVs cause a lot of confusion particularly if there's also a room 'stat. My view is that the TRVs are best regarded as on/off switches or maybe for fine tuning to cope with wrongly sized radiators. If the CH is correctly designed than the room 'stat., along with the programmer, can be left to look after temp. control. Our bungalow has TRVs because I didn't think to tell the builder to omit them when the place was built - the're mostly full on, a couple are off and I hardly ever touch them.

gas4you

Try turning the boiler up to 70c as well

macman

Why have you only got your timer set to the warmest (or, at this time of year, least cold) 3.5 hours of the day? Quite bizarre!
CH is normally on early in the morning from 7 or 8am for 2 or 3 hours, then on again in the evening. Or on all day if the house is occupied.
The boiler will not 'run continuously', since it's ultimately controlled by the timer. When that's off, any room 'stat or TRV settings are irrelevant.

malc_b

Perhaps it might be useful to explain how CH is usually designed:

1. Calculate room losses for -1C outside, 20C in lounge, 18C in bedrooms.
2. Fit suitable radiators to each room, i.e. not smaller that the calculated demand so usually the next size up.

Turning off the heating at night saves only 5-15%. Houses that stay warmer overnight are towards the 5%. Having the heating off overnight puts the house in heat debt that you have to pay back in the morning. The heat to keep the house warm overnight comes out of the house fabric.

So, if your system is just man enough to do the job then to keep the house warm with -1C outside you would need to heat for ~24/24. If it is say 10C outside then ~12/24 as heat loss depends on the temperature difference between inside and outside. If your system has rads say 33% oversized then at -1C it would be ~16/24, and at 10C ~8/24.