Bunker Systems
EMP and Faraday: protect the electronics that keep you alive.
A high-altitude electromagnetic pulse would reach electronics through every wire and antenna connected to them. Protection is layered: stop surges where lines enter, keep spares in shielded storage, keep the bunker able to run cut off from the grid, and put the most important equipment inside a shielded room that is measured, not assumed.
Three tiers
Priced,
installed.
Optional in every bunker. Add it in the Builder, or later. Prices are installed in Utah, including equipment, labor and commissioning, and are confirmed in writing after the site visit.
Basic
$2,995installed
Surge protection at every entry and shielded storage for spares.
- Service-entrance surge protection on the main panel
- Surge protectors on solar DC and AC lines
- Lightning arrestor on the antenna feed
- Faraday bag kit, a duffel and a generator-size enclosure for spares
Standard
$15,750installed
Spare power electronics in shielded storage and the bunker able to run off-grid.
- Everything in Basic, with arrestors on every coax and solar line
- Spare inverter sealed in a Faraday enclosure
- Two welded aluminum storage cases for spare radios and controllers
- Grid disconnect so the bunker runs isolated from the utility, and fiber for data runs
Premium
$97,500installed
A modular shielded room for communications and power controls, tested on site.
- Modular hard-panel shielded room (about 4 x 4 ft), honeycomb vents
- Filtered power entry and bonded single-point grounding
- Everything in Standard
- Third-party shielding test to IEEE 299 after installation, report delivered to you
How we size it
The numbers
behind it.
Three parts of a pulse
CISA describes E1 as a very fast pulse that couples into antennas and short cables, E2 as similar to lightning, and E3 as a slow pulse that drives current into long power lines and the grid.
Solar storms
A severe solar storm acts like E3: it threatens long power lines and grid transformers, not stand-alone electronics. Being able to disconnect from the grid and run on your own power is the protection.
What 80 dB means
Shielding effectiveness is measured in decibels. 80 dB cuts field strength by a factor of 10,000, which is the level military facility standards use. Seams, doors and penetrations decide the result, so it must be measured.
A steel shell is not enough
A buried steel bunker with unfiltered power, open vent pipes and an ungasketed door leaks at exactly the frequencies that matter. Shielding comes from a sealed, filtered, tested enclosure.
Questions
About
emp and faraday.
Is the bunker EMP-proof?
No one can honestly promise that, and we do not. We follow the layered practices in CISA's EMP guidelines and, in the Premium tier, publish the measured shielding of your equipment room.
Does a Faraday bag really work?
Quality bags and enclosures are rated by their makers in decibels of attenuation. They are an inexpensive way to protect spare radios, controllers and electronics that are not connected to anything.
Can you shield the whole bunker?
It is possible but costly: fixed shielded rooms are commonly priced from about $600 to $1,000 a square foot. We quote a custom welded shielded room for larger spaces after design.
Prices set 2026-10-28 from published retail equipment prices plus installation. Brand names describe the class of equipment; we may substitute equal or better equipment based on availability. Subscriptions, well drilling and septic systems are quoted separately.
Build it your way.
Pick a bunker, choose each system and see the installed price, then reserve with a deposit.