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Home double oven heat transfer regulations

There is a  problem in a double oven (one above the other) but in the same carcass (Shell). When the bottom oven is on and running at 200C the top oven, which is switched off,  is warmed by heat from the bottom oven. The top oven temperature  has been measured at 100C of heat transfer. The same is true, but to a lower temperature, if the top oven is on and the bottom oven is off.

 

I am trying to find the specification/regulation for the double ovens that states what the permissible heat transfer is.

Parents
  • I suspect there isn't a regulation as such, just if it meets whatever the maker's design authority  felt  was reasonable at design time
    Do the makers. specify anything at all about cross-coupling , or ventilation of the rear of the two units ? Quite often units are boxed in 'tighter' than they should have been according to the installation instructions.
    Mike.

  • Sadly they only state it meets a specification and all ovens do it.

    Our previous ovens have not had this problem.

    In this regulated Health and Safety  risk adverse society I cannot believe a regulation does not exist somewhere.

Reply
  • Sadly they only state it meets a specification and all ovens do it.

    Our previous ovens have not had this problem.

    In this regulated Health and Safety  risk adverse society I cannot believe a regulation does not exist somewhere.

Children
  • do they not say which specification There are recommendations about how hot external surfaces and controls can get - not aware of any about inside a second chamber

    Ovens & Cookers

    Electric ovens are measured in accordance with standards EN60335-2-6.

    Test conditions

    For a central oven temperature test.
    Pre heat the oven to a temperature of 200°C
    Depending on the height of the oven different temperatures apply.

    For Freestanding cookers and ovens built-in below 850mm from the floor

    Temperature limits are as follows

    • Metal and painted metal 45°C plus ambient temperature
    • Vitreous - enamel metal 50°C plus ambient temperature
    • Glass 7 ceramic 60°C plus ambient temperature
    • Plastic 80°C plus ambient temperature

    For Freestanding cookers and ovens built-in above 850mm from the floor

    Temperature limits are as follows

    • Control knobs and handles are tested in the following manner:
    • Fan ovens; heat to a temperature of 220°C
    • Conventional heat ovens; heat to a temperature of 240°C
    • Grills are run for 30 minutes, however if the power input can be adjusted then it is run for 15minutes on full and 15 minutes at 50%.

    Temperature limits for control knobs and handles

    • Metal and painted metal 35°C plus ambient temperature
    • Plastic knobs with a metallic coating of at least 0.1mm thick are classed as metal,
    • Vitreous - enamel metal 45°C plus ambient temperature
    • Plastic 60°C plus ambient temperature
    • Metal and painted metal 60°C plus ambient temperature
    • Vitreous - enamel metal 65°C plus ambient temperature
    • Glass 7 ceramic 80°C plus ambient temperature
    • Plastic 100°C plus ambient temperature

      Gas Ovens & Cookers

    Gas ovens are measured in accordance with  Standard EN30-1-1

    Front and side Accidental touch.

    Test conditions

    Ovens are operated at 200°C Centre Oven Temperature
    The cooker is run for 60 minutes.
    Grills are not tested if the user instructions state open door grilling.
    If the instructions state closed door grilling, then the grill is operated for the last 30 minutes with the control set according to the maximum in the user instructions.& then turned down to 50% for the last 15min.

    Temperatures are not measured for surfaces that are:

    • Not accessible to 75mm diameter probe.
    • Surfaces that are 25mm below the level of the hob.
    • Surfaces that are within 10mm of the edges of the door.

    Temperature limits for gas ovens

    • Control knobs & handles are measured with:
    • Ovens to be heat to a temperature of 200°C (Gas mark 5 or 6 depending on model)
    • Grills are run for last 15minutes on full

    The permitted temperature limits are as follows

    • Metal and painted metal 60°C plus ambient temperature
    • Vitreous - enamel metal 65°C plus ambient temperature
    • Glass 7 ceramic 80°C plus ambient temperature
    • Plastic 100°C plus ambient temperature
    • Metal and painted metal 35°C plus ambient temperature
    • Vitreous - enamel metal 45°C plus ambient temperature Plastic 60°C plus ambient temperature
  • In this regulated Health and Safety  risk adverse society I cannot believe a regulation does not exist somewhere.

    There'll be a regulation and/or standard if there's a significant risk. Looking at the standards Mike lists it can be seen how these relate to the significant risks of fire, food being undercooked, or burn injuries. It's quite possible that it's not considered a significant risk if the inside of the top oven heats up (as long as the outside doesn't and the temperature control of the top oven can still work correctly when it's being used).