heating water new house

paddym3

good morning all.
I am in middle of building my timber frame airtight house nearly finished the out side so now it time to think about my heating. at the moment I have it plumbed for rads (decided against uf from start) I have provisions to install a condenser boiler in my garage to heat my house. the windows are low u value the kit is and my heating needs should not be a lot. I am installing a mhrv and two room sealed stoves. one 5kw in our sunroof/ living room and one 12kw in our kitchen dining and sitting room (double sided stove). none of the stoves has a back boiler although I will pipe to them just incase I do ever find a suitable one. the big 12kw I hope to nthe radiant heat from the chamber around the stove into my hall via duct and maybe small fan beside the chimney stack soaking it all and losing heat. the wall the 12k stove is on is a block wall deigned to be a termall store when stove is lighting.

my delema is hot water. do I fit in efficient solar panels that wil never work to their efficiency in our country,
or a heat pump to do all my heating which wont be as efficent with the rads but will supply all hot water and heating although the cost is high.
I don't want my boiler kicking in every half hour to accomadate the buffer tank reheating it self.

there is no easy od right way to do this so I am looking for a cost effective solution to a common problem.
no doubt this is very topical so looking forward to every ones opinion
may thanks in advance.

MicktheMan

You don't mention any professional input.

paddym3

Professional input is some thing I have sought but every one trying to sell their own product. I like to try and do best for build as too many cowboys out there
Do you recommend some one that can guide me thru the haze of products to one suited to me. I am in cork

MicktheMan

paddym3 wrote: »

Professional input is some thing I have sought but every one trying to sell their own product. I like to try and do best for build as too many cowboys out there
Do you recommend some one that can guide me thru the haze of products to one suited to me. I am in cork

Sorry, I meant independent professional input, i.e. someone who sells their experience and expertise and not product.:)

PM on its way

fclauson

paddym3 wrote: »

good morning all.
I am in middle of building my timber frame airtight house nearly finished the out side so now it time to think about my heating. at the moment I have it plumbed for rads (decided against uf from start) I have provisions to install a condenser boiler in my garage to heat my house. the windows are low u value the kit is and my heating needs should not be a lot. I am installing a mhrv and two room sealed stoves. one 5kw in our sunroof/ living room and one 12kw in our kitchen dining and sitting room (double sided stove). none of the stoves has a back boiler although I will pipe to them just incase I do ever find a suitable one. the big 12kw I hope to nthe radiant heat from the chamber around the stove into my hall via duct and maybe small fan beside the chimney stack soaking it all and losing heat. the wall the 12k stove is on is a block wall deigned to be a termall store when stove is lighting.

my delema is hot water. do I fit in efficient solar panels that wil never work to their efficiency in our country,
or a heat pump to do all my heating which wont be as efficent with the rads but will supply all hot water and heating although the cost is high.
I don't want my boiler kicking in every half hour to accomadate the buffer tank reheating it self.

there is no easy od right way to do this so I am looking for a cost effective solution to a common problem.
no doubt this is very topical so looking forward to every ones opinion
may thanks in advance.

How are you meeting Part L ?

That will probably drive you choice of water heating - I think give you are only looking for h.w then either gas or oil - unless your Part L needs something else

paddym3

just a quick note on this. i am fitting solar panels on roof once i find a good supplier installer and a condenser boiler. alos running two air tight stoves and one will have a duct system to distribuite warm air around the house combined with the nhrv i hope to cover all my heating needs

freddyuk

"at the moment I have it plumbed for rads (decided against uf from start)"
"my heating needs should not be a lot".
"do I fit in efficient solar panels that wil never work to their efficiency in our country,"
"or a heat pump to do all my heating which wont be as efficent with the rads but will supply all hot water and heating although the cost is high".
If you can explain your decision of these choices based on your heat load calculations that would be of interest? I am confused by your efforts to build an airtight house presumably to lower the energy input and then not worry about the heating cost.

fclauson

paddym3 wrote: »

just a quick note on this. i am fitting solar panels on roof once i find a good supplier installer and a condenser boiler. alos running two air tight stoves and one will have a duct system to distribuite warm air around the house combined with the nhrv i hope to cover all my heating needs

and back to my question - how will you meet Part L

MHRV will NOT distribute warm air around the house effectively

tipperary

Hi OP
I am not quite in the same situation as yourself, but my experience might be of some benefit. We are in our house about 5 years at this stage. Our heating is provided by a stove (with back boiler) and condensing oil boiler. In general the stove does the job, we only turn on the oil if we are home late in the evening. We used aluminium radiators which will work effectively at lower temps than the standard steel ones.
For hot water we have solar panels, which work very well during the summer, but not so well in this weather. If you do go with solar panels, I would suggest getting a controller with an sd card slot, which will allow you to review how the system is performing, how much you need to supplement the solar, etc.
Up to a few months ago we were using the oil boiler to top up the hot water cylinder. Using a timer and thermostat the boiler would only be on for as long as was necessary, often not at all during the summer. With this system however the boiler was generally coming on just to heat the hot water, which was not the most efficient.
A few months ago we wired up the immersion that was on the cylinder, and now use that to heat the hot water. The immersion is on a timer to run during nightsaver hours, and is on a thermostat. I have found that the cost of heating the water has halved since switching to the immersion.
I reckon using oil for the hot water will make sense if the boiler is on in any case to heat the house. However if the stove is going to provide most of the space heating, then an immersion (on nightsaver) might be the most effective option.