Building Biology Quick Guide
- David Blake
- Aug 10, 2021
- 4 min read
Updated: Mar 22
What EMF levels are safe, and how many lights on my meter is bad? These are commonly asked questions. Some would say the short answer is there are no safe non-native EMF levels, and others say non-ionising EMF's present no danger. One thing we can all agree on is that natural background EMF levels aren't just health-supportive but vital for our survival.
If our goal is to reap the rewards of tapping into natural EMF's, noise free, then as far as standards or limits go, Building Biology is posed for the win as their limits sit by far the closest to natures background noise floor. Unlike the more commonly used and highly outdated industry set EMF levels, backed by government authorities, the Building Biology guidelines are anchored around long term biological effects of electromagnetic radiation.

The "V/m" screening handheld values above are specific to the MITO RD-10 [EURO] & ENV RD-10 [STD/AU] meters.
* The meters measures down to approximately 0.5 µW/m²/0.0005mW/m2. Allow for extra distance or shielding.
** The meter measures down to approximately 1-2 V/m.
Allow 1-2 meters of extra distance from the source at the first green light to account for voltage drop-off.
For further information: https://buildingbiology.com/building-biology-standard/
RF Mode: Building Biology Guidelines
Our screening meters detect down to -60 dBm (0.5 µW/m²), slightly less sensitive than professional RF meters, which measure below 0.1 µW/m². (0.0001 mW/m²) However, they are effective for screening RF environments.
Most RF broadband meters struggle with accuracy when measuring multiple RF sources. Even top-tier meters can’t calculate precisely in dense RF areas—only real-time spectrum analyzers can. For general assessment, RF broadband meters remain the simplest option.
Ideally, you’d see no RF signal from your roof, but this is rare today, even in rural areas.
Note: If highly sensitive to RF, consider the Envirosens ENV RD-100 3-in-1, which is 0.5 µW/m² more sensitive than the MITO RD-10 [EURO] and ENV RD-10 [STD/AU]. However, both RD-10 models are 100 µW/m² more sensitive than the Trifield 2 and match the Cornet meters.
For PowerGrid background levels, the MITO RD-10 [EURO] and ENV RD-10 outperform post-COVID professional meters, which often miss half of the actual low-frequency presence.
LFM Mode: Building Biology Guidelines
For a restorative sleep and vivid dreaming, aim to sleep in an environment with less than 0.2 mG / 20 nT of background magnteic feilds from the PowerGrid.
The MITO RD-10 [EURO] and ENV RD-10 can accurately measure down to the required sleeping levels via the LED display and can measure all the way down to 0.01 mG / 1 nT when connected to a PC, Android, or Mac and can accurately measure down to the required sleeping levels via the display.
In Australia, the best environments we have found are properties that sit on non-fluctuating A/C fields around 0.05 mG / 5nT 24/7. (Single axes) Properties this low are manly rural in location but can still be found in pockets around cities.
The MITO RD-10 [EURO] and ENV RD-10 are designed to provide precise readings at 50/60Hz but tend to overread when close to electronics operating at higher frequencies, such as phones and laptops. The power values are adjusted to assist in identifying hotspots in vehicles and electronic devices. In contrast, our competitors generally offer more accurate high-frequency readings. However, our priority is to ensure our meters are calibrated for accurate measurements at 50/60Hz, even if this results in higher readings at higher frequencies. This is important because when buying a home for a family, a key consideration, apart from avoiding proximity to towers, is maintaining a low background dynamic magnetic field level.
LFE Building Biology Guidelines
As far as sleeping areas go, even if you have one green light on the MITO/RD10[AU] in LFE Mode it places you in the serve concern Building Biology E-Field category. (Electric)
Its important to keep in mind that the MITO/RD10[AU] in LFE Mode only measures down to approximately 1-2V/m. Ideally, we should measure down to at least 0.3 V/m (300mV/m) if we are serous about following the highly stringent German Building Biology guidelines.
There are a few ways to get around the limited E-Field sensitivity of MITO/RD10[AU]. If budget permits, is to purchase a dedicated profesional E-Field meter like the Gigihertz Solutions ME3851A. (€540) Or you could hire a Building Biology EMF specialist to conduct an on-site survey. As a rule of thumb, you could also work off the inverse square law of the E-Field drop off and make sure you have no LED lights on your meter in LFE Mode within one to two meters from your bed. Try turning off ALL your wireless devices and bedroom power circuits at the switchboard, as in some cases, that's all it takes to get over the line and to achieve a more regenerative sleep. Note that it is not always possible to reach these low levels with some properties and that the elimination process may require an electrician and/or a RF shielding solution.
Please contact Blake's if you would like the contact details of a Building Biology EMF specialist in your area.
Related Links
Bio Initiative Report; https://bioinitiative.org/report/wp-content/uploads/pdfs/BioInitiativeReport2012.pdf
Building Biology guidelines and testing methods;
https://buildingbiology.com/building-biology-standard/
Australasian Society of Building Biologists
https://www.asbb.org.au/
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