Mike_scotland

im not sure what it is, i thought plywood was not waterproof but OSB was hmmm ill need check with my builder this evening for clarity.

i think its OSB , can it be plywood or similar?

i think we are 150mm of wooltherm or whatever it is called then 40mm of PIR insulation on top then taped the butts.

very nice that Dave. looks a good job.

we are TF house mate with a render outer leaf breeze block.

how did you get it so low Dave? any tips i can do or say to my builder(he should already know, i know) but builders are builders.... hes taping the insulation i know that

i think my SAP calcs and builder was saying hes aiming for 4 minimum, but i hope we get lower and i will see what we can do at this stage to guarantee 3.

hahahaha its going to be some size of stick hes twice the size of me!! what is a good air tightness to realistically be looking at? to get 0.5 is that not very low?

i think possibly as it will just take a bit of space from the garage, i will discuss with the builder as you are correct in what you are saying, and im a bit panicking about the rising cost of elecy and my whole house is electricity.

going back to what i said before, we have a plant room its roughly 1m by 2.5m.

sorry its 14kw i just re read an email. yeah sort of makes sense, so if my house was double the size but airtight(as an example) the heat pump could well be even less kw?

i think our hot water cylinder will be inside a large cupboard at the back of the garage but the cupboard is to be well sheeted out with insulation for that exact reason to keep it warm in there, i think that is were it is going anyway on the plans we have a designated space for equipment etc for all the stuff the ASHP presumably comes with

sounds like the penny has dropped mate haha!, im all new to this but i love learning new things and want to learn. makes sense to do that definitely. so what do you have an 10kw ashp and 4kw solar panels? i think my builder has stated a 12kw ashp for me its a 230m2 house.

totally makes sense now mate, so even with just a few hours E7 elecy to heatup your water it stays hot most of the day!

so you can have it set to that in your system? so in the cloudy/bad weather months the ASHP will heat to X pre set temp and in the good days the immersion will heat more ( hopefully at a free or heavily reduced cost?)

and these temps are all from your ASHP producing the HW? i take it most systems will have a immersion for safety incase they require more heat?

so you keep a steady 45-48 degrees?

yeah i get you, it is a valid point thought if the ashp needs to work extra extra hard to produce hw, so the ASHP will produce HW upto a certain temp then a immersion tops it up x amound of temp?

i have not mate my house is in the process of being built currently, currently i have a Ashp with plenty insulation and nothing else renewable but with rising elecy prices im thinking solar panels

so what exactly is a divert? is that equipment that will divery elecy to a pre set electrical device? so what are you thinking? ashp works away itself for heating... but excess elecy is pumped into immersion to heat HW? but in the winter it might give a little but not much.

ok mate, i will look into the solar PV as my first choice then, i have a ashp i want it to help run haha!

yes i did think that also, i also seen they dont offer the buy electricity from you scheme if your on the octopus go. so its one of the other they will either buy elecy from you or you can get 4 hours cheap elecy. but like you said it will likely disappear

i currently work away from home for 2/3 weeks at a time and my wife works 9-5. (but she may be working from home shortly) i get it im selling it to the grid during the day for5p yet when i need it at night im buying it for 25p its a false economy at times, is a battery not worth it in the long run dont you think? battery fills during the day and gets used at night? and im hoping to use my ASHP and UFH to go on at night with a cheaper tarrif.

awwwww i get you now, its such a hard decision, part of me wants to buy a battery and charge it at night with cheap elecy from octopus go (4p)

so you dont think i would get the 3600 kwh free to run electrical items in my house? as an example if my heating was electric and 3600kwh would it not be totally free?