My building inspector identified significant heat loss at the garage-to-utility room door during the final inspection using a thermal imaging camera. The garage is not insulated. The utility room serves as a storage and laundry area and is heated with underfloor heating. It also houses the heating system (air-to-water heat pump). My general contractor installed a T30 fire-rated smoke protection steel door (Hörmann H3D – thermal transmittance coefficient: U_D = 1.9 W/m²K) as the passage door. According to the manufacturer’s datasheet, this door’s frame is not thermally broken, and the door leaf has only minimal insulation.
Questions:
1) Is it allowed or common to install a door with such low insulation performance (H3D) here? What does the 2009 Energy Saving Regulation (EnEV) say about this?
2) Does Hörmann offer a more suitable door option, possibly the KSI-Thermo? Or are there alternatives from other manufacturers? Alternatively, is it standard practice to install two doors with an airlock (a regular entrance door AND a fire protection door) in this case?
(Note: The building authorities have informed me that the door must be self-closing and comply with fire resistance class T30.)
Questions:
1) Is it allowed or common to install a door with such low insulation performance (H3D) here? What does the 2009 Energy Saving Regulation (EnEV) say about this?
2) Does Hörmann offer a more suitable door option, possibly the KSI-Thermo? Or are there alternatives from other manufacturers? Alternatively, is it standard practice to install two doors with an airlock (a regular entrance door AND a fire protection door) in this case?
(Note: The building authorities have informed me that the door must be self-closing and comply with fire resistance class T30.)
B
Bauexperte11 Mar 2012 23:55Hello,
What does the thermal performance certificate say?
Best regards
Klaus971 schrieb:
My inspector detected significant heat loss through the door between the garage and the utility room during the final inspection of the new build using a thermal imaging camera. ... As the access door, my general contractor installed a T30 smoke protection steel door (Hörmann H3D – thermal transmittance coefficient: U_D=1.9 W/m²K). According to the manufacturer’s datasheet, the frame of this door is not thermally broken, and the door leaf itself has only minimal thermal insulation.
What does the thermal performance certificate say?
Best regards
B
Bauexperte12 Mar 2012 22:49Hello,
That sounds like a bad joke.
Your general contractor is not allowed to withhold this certificate or offset its cost against other expenses, nor exercise a right of retention if proven defects exist. Perhaps you should ask your inspector to give your general contractor a “lesson” on this matter.
Kind regards
Klaus971 schrieb:
Unfortunately, my general contractor only hands over the thermal protection certificate once the final payment is fully made. But there are still defects...
That sounds like a bad joke.
Your general contractor is not allowed to withhold this certificate or offset its cost against other expenses, nor exercise a right of retention if proven defects exist. Perhaps you should ask your inspector to give your general contractor a “lesson” on this matter.
Kind regards
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