won't install new cooker without new extraction!?

[RenegadeBum]

Are the cooker and hood on an outside wall?

Alas no, and that's why the ducting quotes are so horrific!

Is a hood mandatory for electric cookers, as well as externally-vented extraction?

 

[Des 56]

I think your obligation to provide ventilation for a electric cooker in your kitchen is towards H+S for your workers

H+S quote
Regulations require that employers provide effective and suitable ventilation in every enclosed workplace. This includes kitchens, which need ventilation to create a safe and comfortable working environment.

I believe the Electric cooking safety requirements are not going to be anywhere near as problamatic as for Gas

 

[SparkyChick]

I believe the answer is yes to the is it mandatory question. It's there to draw off harmful chemicals created by cooking.

 

[Des 56]

Is a hood mandatory for electric cookers, as well as externally-vented extraction?



I believe a canopy is only "recommended" and that extraction from a fan elsewhere in the room would be fine
Extraction of the air and the replacement with clean air can be either from other areas of the building or a outside vent in an area where the air is not fouled (Bins or smoking zones etc)

Here is some copied content for the above opinion

Where canopies are not used, eg where extraction is through ventilated ceilings, consult a competent heating and ventilation engineer to calculate the appropriate ventilation rates

Repacement air
The ventilation system design should take into account the need to replace extracted air. Mechanical and/or natural means can provide make-up air, but it should be fresh and unadulterated from the outside. In smaller kitchens, there may be sufficient replacement air drawn in naturally via ventilation grilles in walls, doors or windows. Where air is drawn in naturally, some means of control over pest entry is usually needed. A fine mesh grille will restrict the ventilation, and a larger grille area can compensate. However, for larger installations, a mechanical system using a fan and filter is more suitable. The ‘clean air’ should not be taken from ‘dirty’ areas, eg waste storage, smoking areas etc. The make-up air should not impair the performance of flues serving gas appliances

 

[Last plumber]

Not as complicated as gas. With gas we are concerned with the removal of products of combustion and providing enough combustion air as well as removal of cooking fumes/ vapours etc.
Modern electric cookers are more efficient than they used to be.
If you can go with electric you could save yourself a headache !

 

[RenegadeBum]

Ah ok. Sounds best to go with electric. AFAIK even the ventilation for building regs (provided you have an opening window) only apply to new kitchens, not existing.

Just to be clear the kitchen DOES already have an opening window and it's only a 6-burner used three times a day. It's not like a big restaurant or anything.

 

[Darkwood]

I would get a second quote, if they also state the requirement for such equipment then I would accept the requirements for it, also through experience I have found said company that has been mentioned are not always the cheapest option, they often use subbed in local contractors so they act as middle men which can be more costly then going direct to a local registered installer.
You would need to weigh up the demand on the new range if you go electric against the max demand of the premises already, even with modern more efficient oven/hobs, they still can be heavy uses of electric.

 

[Last plumber]

Ah ok. Sounds best to go with electric. AFAIK even the ventilation for building regs (provided you have an opening window) only apply to new kitchens, not existing.

Just to be clear the kitchen DOES already have an opening window and it's only a 6-burner used three times a day. It's not like a big restaurant or anything.

So why are you buying a commercial cooker ?
Do you really need one ?
What is the Room Vol?
Is there a door to outside?
Is the oven Gas ?

If you buy a commercial gas cooker, it MUST be installed to commercial standards.
That is because the manufacturers have classed it as a commercial appliance.

If you buy a domestic cooker, it can be installed to domestic standards and they are worlds apart !

I know this is a Care home but they differ greatly in size, some are only large domestic.

You need to asses the need here before you spend ! it may be unnecessary expense.

 

[Phil Thompson]

One of my clients has a domestic gas cooker in her bakery/hot food takeaway. For these exact reasons.

 

[RenegadeBum]

OK thanks. So that means that we could replace the existing gas cooker with another domestic one, and the hood extraction plus gas interlock don't apply?

Yes I do think a larger domestic cooker would do for us as it's not a particularly large number of people we cook for, nor is it in constant use.

 

[Last plumber]

OK thanks. So that means that we could replace the existing gas cooker with another domestic one, and the hood extraction plus gas interlock don't apply?

Yes I do think a larger domestic cooker would do for us as it's not a particularly large number of people we cook for, nor is it in constant use.

It depends on the size of the room. If you answer these questions, I will tell you the ventilation requirements for a domestic cooker.

Is there a door direct to outside air?
Is there an op-enable window?
What is the room volume in Meters Cubed?

 

[RenegadeBum]

OK thanks last plumber, will get these and come back to you! I believe the answer to the first two is NO door direct to outside air, YES to an open-able window

Best

 

[Last plumber]

I will await your return.