how long is a realistic time for boiler to heat the house from cold?

londonTiger

macman wrote: »

But it's insane to have CH and not use it on the timer. The outside weather and temp is irrelevant, because what you are trying to achieve is a consistent temp inside-and that's what the room 'stat or TRV's are for. You won't 'rack up bills', because if it's warmer then the 'stat will shut the boiler down as soon as the set temp is achieved-which will be sooner than when it's cold..
Are you saying that there is a programmer but no room 'stat? if so, this is a breach of the building regs for a new install.

never used the thermostat, the room which has the thermostat is a home office with a tropical fish tank so there are printers, computers and someone in the room most of the time, the tropical fish tank is heated 24/7. So the thermostat is unreliable.

saveallmymoney

Put a wireless thermostat in so you can have it in the right place.

macman

As above, wireless 'stat.
I cannot imagine anything more pointless than a CH system running without a 'stat and with the timer on manual too. You can't expect the house to come up to temp in less than 45 mins from a cold start, which is the whole point of a timer-you set it to fire up maybe an hour before you get up.
NB: most modern digital programmers have an 'offset' function which enables you to adjust for the 'stat being in a warmer or colder place compared to the house norm.

Nada666

macman wrote: »

But it's insane to have CH and not use it on the timer. The outside weather and temp is irrelevant, because what you are trying to achieve is a consistent temp inside-and that's what the room 'stat or TRV's are for. You won't 'rack up bills', because if it's warmer then the 'stat will shut the boiler down as soon as the set temp is achieved-which will be sooner than when it's cold.

No it's not, not for a great many households. What is the point of heating the whole house for hours in the morning if you are going to spend most of the time you are up standing under a hot shower and grabbing a coffee and a bit of toast?

If you have a large household or are having a leisurely weekend early brunch then okay - but for most households keeping the timer on twice daily for months on end is wasteful. Especially so if over three storeys.

If the house is insulated then a morning session is not necessary. If the house is uninsulated then the morning session is even more wasteful.

Just make use of long evening sessions - that should be enough to maintain the fabric to the following late afternoon.

(Yes, there does seem to be a problem with the thermostat.)

DTDfanBoy

Nada666 wrote: »

No it's not, not for a great many households. What is the point of heating the whole house for hours in the morning if you are going to spend most of the time you are up standing under a hot shower and grabbing a coffee and a bit of toast?

Sure if you're happy to wake up to a cold house don't use a timer and don't use the heating in the mornings.

I don't like waking up to a cold house nor do I like arriving home to a cold house, therefore I use the timer to make sure the house is warm when I want it to be.

If you want to wake up to a warm house it's idiotic not to use the timer

macman

Nada666 wrote: »

No it's not, not for a great many households. What is the point of heating the whole house for hours in the morning if you are going to spend most of the time you are up standing under a hot shower and grabbing a coffee and a bit of toast?

If you have a large household or are having a leisurely weekend early brunch then okay - but for most households keeping the timer on twice daily for months on end is wasteful. Especially so if over three storeys.

If the house is insulated then a morning session is not necessary. If the house is uninsulated then the morning session is even more wasteful.

Just make use of long evening sessions - that should be enough to maintain the fabric to the following late afternoon.

(Yes, there does seem to be a problem with the thermostat.)

Whether you want to heat in the mornings on work days is up to the user (and, as you say, dependent on the insualtion factor), but in this case the OP clearly does want to use it in the mornings. If so, If so, surely it's better to use it on timer to have it warm when you get up, than switch on manually so it's not warm until you are going out. The cost would be virtually the same, assuming the same running time.

Shrimply

macman wrote: »

Whether you want to heat in the mornings on work days is up to the user (and, as you say, dependent on the insualtion factor), but in this case the OP clearly does want to use it in the mornings. If so, If so, surely it's better to use it on timer to have it warm when you get up, than switch on manually so it's not warm until you are going out. The cost would be virtually the same, assuming the same running time.

And that's not even considering that your heaters are going to continue giving off heat after the boiler is turned off. My heating is timed to go off before I'm even up but the temperature continues rising until I leave the house an hour later.