For sale now · Order / pre-order
Clean one room properly.
SHIELDGUARD Air Filter — room-isolation air treatment for one bedroom or apartment room.
Three functions: (1) cartridge pre-filter → charcoal → high-efficiency media → fan; (2) enclosed 265 nm UV-C after the fan — no UV in the room; (3) separate LID chamber for phones, keys, and masks (≥2 minutes; flip objects — UV does not reach shadows).
CAD $1,499
Ask to order / pre-order — final certification and registration in progress. Includes unit + first cartridge. Confirm boot size when ordering.
Ask to order · CAD $1,499 Email usHigh-efficiency filtration
JD-3003 (ShieldGuard 2023): 100% @ 10–1 µm · ~99.73% @ 0.5 µm · ~99.44% @ 0.3 µm MPPS. High-efficiency mechanical filtration for residential room isolation.
Enclosed 265 nm UV-C
Enclosed 265 nm UV-C after the filter, zero UV leakage into the occupied room.
LID chamber
Separate chamber for phones / keys / masks. ≥2 minutes. Flip objects — UV does not reach shadows.
How it works
The unit couples to ONE floor supply vent in the TARGET ROOM. If that room has 2–3 supply grilles, seal only the extra grilles in that room with a gasketed magnetic cap. Leave every grille in the rest of the house as the HVAC technician balanced them. Door closed. Clean air returns to the same room. A slight +ΔP is possible if the door sweep is decent. This does not replace the furnace Filtrete/3M filter — keep MERV 11–13 at the furnace.
Results depend on door undercut, leaks, and measured ACH — we do not claim “100% of air in the isolated room” as a guarantee.
Two modes
A — Intercept (furnace on)
- Treat air at that one vent
- Match fan to measured boot CFM (typical 90–120 CFM after sealing sibling grilles)
- Do not run High (~282 CFM) on intercept if the boot only supplies ~100 CFM
B — Recirculate (furnace off)
- Cabinet inlet pulls room air through the same stack
- Mid ~137 CFM or High ~282 CFM is correct here
- About 7–16 ACH in a 12×12×8 ft bedroom (geometry-dependent)
Air path
Floor vent / room inlet → pre-filter → charcoal → HEPA media → fan → enclosed 265 nm UV-C → outlet into the same room.
Engineering block diagram (PDF)
1 · Block diagram
Source architecture: ShieldGuard engineering Block Diagram (pré-filter → charcoal → high-efficiency HEPA media → fan → UV-C with LID). PDF
2 · Air dynamics inside the cartridge
- Room air enters a single open floor inlet; other inlets sealed.
- Cartridge stack removes particles and odours progressively.
- Blower pushes air through the enclosed UV-C chamber (no eye exposure).
- Clean air returns to the same room, building positive pressure at the closed door.
Air is drawn from a single open floor inlet (all others sealed). It passes through the replaceable cartridge (pre-filter → charcoal → high-efficiency HEPA media), then the fan drives air into the enclosed 265 nm UV-C chamber. Treated air returns to the same room. A slight +ΔP is possible if the door sweep is decent; results depend on leaks and measured ACH.
Air Processing Sequence
Air path: floor vent or room inlet → pre-filter → charcoal → high-efficiency HEPA media → fan → enclosed 265 nm UV-C → outlet into the same room. Cartridge layers are user-replaceable. The LID chamber is separate — for personal items (≥2 minutes; flip objects), not the air path.
Install (one screen)
- Rest of house untouched
- Cap sibling boots in the target room only
- Measure the remaining boot CFM
- Confirm the furnace still runs normally
- Gasket for 4×10 / 4×12 / 6×10 / 6×12
- Optional door ΔP +2.5 to +8 Pa
- Unused boot in that room gets a sealed cap — not half-closed slats
- Housing rated for winter supply air
Filtration — JD-3003 test (ShieldGuard 2023)
| Particle size | Inlet | Outlet | Reduction |
|---|---|---|---|
| 10 µm | 0 | 0 | 100% |
| 5 µm | 1 | 0 | 100% |
| 3 µm | 3 | 0 | 100% |
| 1 µm | 36 | 0 | 100% |
| 0.5 µm | 1,107 | 3 | ~99.73% |
| 0.3 µm | 16,488 | 92 | ~99.44% |
High-efficiency HEPA-class cartridge. We do not headline EN 1822 H14 (H14 requires ≥99.995% at MPPS; measured is 99.44% @ 0.3 µm).
Full specs size · CFM · dB · marks
- Dimensions: 17.3″ L × 11.9″ W × 19.5″ H · Weight: 10 kg
- Electrical: 120 V · 0.384 A · 44 W
- Airflow: Mid 233.49 m³/h (~137 CFM) · High 478.66 m³/h (~282 CFM)
- Noise: Off 37.9 dB · High 51.0 dB · 39.5 dB @ 1 m
- Operating: 5–40 °C · 20–90% RH
- Cartridge: 12 months normal / 6 months heavy (>12 h/day) · user-replaceable
- UV emitter: 10,000 h · enclosed 265 nm — zero UV in the occupied room
Furnace still needs its MERV 11–13.
Consumables: contact for replacement cartridges — no invented cartridge price on this site.
Not a licensed medical device. Marks above are electrical / EMC / RoHS — not a medical licence. Certification and registration remain in progress.
Who it’s for
One bedroom or apartment room — measured numbers, no hospital marketing.
Allergy / asthma bedroom
One room for sleep — high-efficiency mechanical filtration and enclosed UV-C, with zero UV in the occupied room.
Wildfire-smoke nights
Particle reduction in the room you sleep in. Keep MERV 11–13 at the furnace.
Condo / apartment room
One supply boot in the target room. Seal only extra grilles in that room.
Residential recovery / senior room
A comfort and particle-reduction device — not a licensed medical device.
Not for: operating rooms, ISO cleanrooms, or as a substitute for a whole-house high-efficiency furnace filter.
Frequently Asked Questions
How is this different from a portable air purifier?
Portables recirculate room air in an open room. The SHIELDGUARD Air Filter couples to one floor supply vent in the target room. Extra supply grilles in that room only can be sealed with a gasketed magnetic cap. The door stays closed. Treated air returns to the same room. The rest of the house vents stay as the HVAC technician balanced them.
Do I close all supply grilles in the house?
No. Seal only the extra supply grilles inside the target room if that room has more than one. Leave every grille in the rest of the house alone.
What are Mode A and Mode B?
Mode A — Intercept (furnace on): treat air at that one vent. Match the fan to measured boot CFM (typical 90–120 CFM after sealing sibling grilles in that room). Do not run High (~282 CFM) on intercept if the boot only supplies ~100 CFM. Mode B — Recirculate (furnace off): the cabinet inlet pulls room air through the same stack; Mid ~137 CFM or High ~282 CFM is appropriate here.
Does this replace my furnace Filtrete / 3M filter?
No. Keep a MERV 11–13 filter in the furnace. This unit treats the room you sleep in; it does not replace whole-house filtration.
Is UV-C in the occupied room?
No. The 265 nm UV-C stage is enclosed after the fan. There is zero UV leakage into the occupied room. A separate LID chamber treats phones, keys, and masks (≥2 minutes; flip objects — UV does not reach shadows).
What filtration was measured?
JD-3003 test (ShieldGuard 2023): 100% reduction at 10 µm through 1 µm, ~99.73% at 0.5 µm, and ~99.44% at 0.3 µm MPPS. We describe this as high-efficiency mechanical filtration for residential room isolation — not as EN 1822 H14.
Is this a licensed medical device?
No. It is a residential room-isolation air treatment product. Electrical / EMC / RoHS marks apply (IEC 61010-1, IEC 61326 Class A, FCC Part 15, ICES-003, RoHS, Pb-Free). It is not a Health Canada medical licence and is not sold as a medical device.
How do I order?
CAD $1,499 includes the unit and the first cartridge. Status: order / pre-order — final certification and registration in progress. Email contact@shieldguard.ca with boot size (4×10 / 4×12 / 6×10 / 6×12) and room type, or use the form on this site.
Ask to order — CAD $1,499
Includes unit + first cartridge. Confirm boot size when ordering.
Status: Order / pre-order — final certification and registration in progress. contact@shieldguard.ca
Also in development: modular residential bunker (concept only). Concept page →