BER Exemption

descol

Hi
Would anyone be able to give an example of a 'building' with low installed heating capacity (less than 10W/m2) - as noted by SEAI as being exempt !
thanks

sydthebeat

an agricultural cow shed

descol

Thanks Syd
I assume a shed with no power supply / lighting etc - but if it had T8 lighting installed would it meet the exemption requirement ?

sydthebeat

descol wrote: »

Thanks Syd
I assume a shed with no power supply / lighting etc - but if it had T8 lighting installed would it meet the exemption requirement ?

from the regulations (Part L)


Low level of heating is considered to be where there is an installed heating capacity of less than 10W/m2. This includes buildings where heating and cooling systems are not provided, or are provided to only heat or cool a localized area rather than the entire enclosed volume of the space concerned eg. localized radiant heaters at a workstation in a generally unheated space. A low level of heating can also be considered to apply where spaces are heated to a level substantially less than those normally provided for human comfort e.g. to protect a warehouse from condensation or frost. In these situations all fixed building services should meet the guidance in for heating systems in section 1.4.1 or 2.2. Fabric should have a U value appropriate for the heating
system provided and in no case greater than 0.7 W/(m2K). If a part of a building with low energy demand is partitioned off eg. an office in an unheated warehouse then the partitioned area should be treated as a separate building and the guidance for fabric applied from section 1.3 or 2.1. Where the occupancy level or level of heating required when in use cannot be established at construction stage, the building should be treated as fully heated and the provisions of Part L applied accordingly. It should be noted that the provisions of Part L apply where a material change of use occurs and such a change of use may require specific construction measures to comply with Part L.
These measures may prove more costly than if carried out at the time of initial construction.

descol

Syd - thanks again
So, suppose there is an Ag shed of 30sqm with 6 sets of twin T8s fluorescent fittings installed.
Each twin T8 = c.30 watts - thereby giving total of 360 watts for the 30sqm building = 12W/m2 - which is over the exemption criteria of 10W/m2
making a BER cert a requirement - Would you think I am correct in this thinking ?
your comments appreciated

Dardania

descol wrote: »

Syd - thanks again
So, suppose there is an Ag shed of 30sqm with 6 sets of twin T8s fluorescent fittings installed.
Each twin T8 = c.30 watts - thereby giving total of 360 watts for the 30sqm building = 12W/m2 - which is over the exemption criteria of 10W/m2
making a BER cert a requirement - Would you think I am correct in this thinking ?
your comments appreciated

installed capacity or installed heat capacity? Maybe that's the exemption there - the T8s aren't for heating

sydthebeat

Dardania wrote: »

installed capacity or installed heat capacity? Maybe that's the exemption there - the T8s aren't for heating

I agree with this.

No heating system generally means exempt.

descol

thanks
that sorts it - My misunderstanding on - heating/ lighting