Garage passage door thermal bridge

My inspector determined during the new building acceptance with a thermal imaging camera that the passage door from the garage to the utility room shows very high heat losses. The garage is not thermally insulated. The utility room is used as a storage and laundry room – it is heated with underfloor heating. The heating system (air/water heat pump) is also located here. As a passage door, my general contractor installed a T30 smoke protection steel door (Hörmann H3D – thermal transmittance coefficient: UD=1.9W/m²K). According to the manufacturer’s datasheet, the frame of this door is not thermally separated, and the door leaf is only slightly thermally insulated.

Questions:
1) Is it allowed/common to install a slightly insulated H3D door here (what does the Energy Saving Ordinance 2009 say about this)?
2) Is there a better-suited door from Hörmann? Possibly KSI-Thermo? Or another manufacturer. Or is it common to install two doors with an airlock here (regular front door AND fire protection door)?
(Note: The building authority informed me upon inquiry that the door must be self-closing and implemented in fire resistance class T30)

Hello,

My appraiser found during the new building inspection with a thermal imaging camera that the passage door from the garage to the utility room shows very high heat losses. ... As a passage door, my general contractor installed a T30 smoke protection steel door (Hörmann H3D – thermal transmittance coefficient: UD=1.9W/m²K). According to the manufacturer's data sheet, the frame of this door is not thermally separated, the door leaf is only slightly thermally insulated.

What does the thermal protection certificate say?

Best regards

Unfortunately, my general contractor only hands over the thermal insulation certificate once the full payment of the final installment has been made. But since there are still defects...

Hello,

Unfortunately, my general contractor only hands over the thermal insulation certificate once the full payment of the last installment has been made. But since there are still defects...

That is probably a bad joke

Your general contractor is not allowed to withhold this certificate from you or offset its costs against other costs, let alone exercise a right of retention if defects exist that have been proven. Perhaps you should ask your expert to give your general contractor a "lesson" on this matter.

Best regards