Installing a pantry into a passive house it needs to be uninsulated ( cold room)

CaraK

Looking for your thoughts.... before my builder try's to talk me out of it

Building is timber frame with external insulation

Pantry is located on the North wall

BER guy said to dry line this room and not put any underfloor heating in.

Poor Uncle Tom

It needs to be unheated, not uninsulated. Even a fridge is insulated.

mrsWhippy

Also should be externally ventilated, therefore sealed to the interior of the house

ted1

CaraK wrote: »

Looking for your thoughts.... before my builder try's to talk me out of it

Building is timber frame with external insulation

Pantry is located on the North wall

BER guy said to dry line this room and not put any underfloor heating in.

Insulation is a two way thing, keeps heat in and out.

BryanF

mrsWhippy wrote: »

Also should be externally ventilated, therefore sealed to the interior of the house

How does this work with the passive house certification ?

Metric Tensor

I'm not sure passive is being used in the sense of the word that we would understand.

I've noticed a creeping use of the term passive for any house that passes a Part L check of late!!

Johnnyhpipe

Metric Tensor wrote: »

I'm not sure passive is being used in the sense of the word that we would understand.

I've noticed a creeping use of the term passive for any house that passes a Part L check of late!!

Its lost all meaning in the last 12 months!

CaraK

Thanks for replies

Yes it is passive house, it's being put through the PHPP and it works how I don't know. It's on my list for next meeting with him in the meantime I have asked a couple of builders to price it up for me and one of them has asked how this ( the pantry) works. I taught I could explain it but couldn't. Previous experiences with builders have taught to know exactly what has to be done from outset or you end up with the builders method and not the correct detail

Passive designer never mentioned anything about need to externally ventilate don't want to have to do that. No extractor hood is planned for kitchen going with charcoal filter built into the hob and stove will have external air supply brought in via the passive slab

Essentially it's a room to store perishable food ( or the fresh turkey) having visited a couple of passive certified houses the owners mentioned that fresh food deteriorates quickly in passive house and one of them showed me his outdoor pantry for storing his veg ....a wheelie bin��

Metric Tensor

CaraK wrote: »

Yes it is passive house, it's being put through the PHPP and it works

Fair enough. I stand corrected.

mrsWhippy

It was recommended to us that we include one of these pantries in our new build, though we just don't have the space.

Apparently one of the main reasons food goes off quicker is that the humidity will be lower in a passive (or mhrv house), and it tends to dry out faster. This is why it was suggested to us to externally ventilate so the pantry has the same humidity as the outside.

BrianF, I don't know how it works with a Passive House certification, we are not building a passive house.

ted1

CaraK wrote: »

Thanks for replies

Yes it is passive house, it's being put through the PHPP and it works how I don't know. It's on my list for next meeting with him in the meantime I have asked a couple of builders to price it up for me and one of them has asked how this ( the pantry) works. I taught I could explain it but couldn't. Previous experiences with builders have taught to know exactly what has to be done from outset or you end up with the builders method and not the correct detail

Passive designer never mentioned anything about need to externally ventilate don't want to have to do that. No extractor hood is planned for kitchen going with charcoal filter built into the hob and stove will have external air supply brought in via the passive slab

Essentially it's a room to store perishable food ( or the fresh turkey) having visited a couple of passive certified houses the owners mentioned that fresh food deteriorates quickly in passive house and one of them showed me his outdoor pantry for storing his veg ....a wheelie bin��

Could you get a variant of a fridge?

CaraK

Thanks for clarifying it not a passive house your building

one less cold bridge to worry about

I'd imagine with high levels of insulation and air tightness coupled with MHRV humidity will be a problem regardless of whether one is building passive or not.

The wheelie bin pantry convinced me to work it into the plans it meant reducing the size of the utility but when it was pointed out to me that upstairs plant room could be divided into a laundry room it was a win win

Poor Uncle Tom

Suggestion for a pantry:

No heat, well insulated and bring the mains water pipe in, insulated up to the floor, uninsulated while the pipe loops around the inside of the pantry, and insulated again when it goes back to the floor and off on it's merry way to the water tank and kitchen sink.

That should theoretically work opposite to a coil in a hot water cylinder.

CaraK

Thanks Poor Uncle Tom👍

That will make an for an interesting discussion with the plumber tomorrow

Flibble

I have no idea if it would work in a passive house, but this fridge works pretty well, I've seen it in action.

BryanF

I've seen similar but
Keep storage out side the thermal /air-tight envelope is the only phpp option I've seen

bertie 56

Poor Uncle Tom wrote: »

Suggestion for a pantry:

No heat, well insulated and bring the mains water pipe in, insulated up to the floor, uninsulated while the pipe loops around the inside of the pantry, and insulated again when it goes back to the floor and off on it's merry way to the water tank and kitchen sink.

That should theoretically work opposite to a coil in a hot water cylinder.

Good idea, but you might have to connect this to a drain, though. I'm afraid this pipe will give a lot of condensation to evacuate . And therefore , it will work as a dehumidifier , so your room will be drier too.

bertie 56

The idea of a pantry is done around by an Irish passive house manufacturer .
I think the way they do is to have the internal pantry walls the same way as the external walls : same amount of insulation and airtight.
Two ventilation holes ( up and down ) connected to the outside, and a well insulated - airtight door that communicate with the rest of the house. You can have a normal door between the pantry and outside, if you need one.
You could talk to them to have a better idea, maybe. They call it " larder ", by the way.
Name in PM if requested.