diff --git a/docs/adr/0045-gas-cpsu-dumping-ground-splits-into-solid-fuel-and-electric-boiler-archetypes.md b/docs/adr/0045-gas-cpsu-dumping-ground-splits-into-solid-fuel-and-electric-boiler-archetypes.md
index 49117b477..da1bdad85 100644
--- a/docs/adr/0045-gas-cpsu-dumping-ground-splits-into-solid-fuel-and-electric-boiler-archetypes.md
+++ b/docs/adr/0045-gas-cpsu-dumping-ground-splits-into-solid-fuel-and-electric-boiler-archetypes.md
@@ -49,28 +49,41 @@ Add the missing archetypes and reclassify the bucket. No calculator change.
    `"Solid fuel room heater, open fire with back boiler"` → 632,
    `"Solid fuel room heater, closed with boiler"` → 634. Companions drag from the
    code (already-covered 631–636 set) — no overlay-logic change.
-2. **`"Electric boiler"` → SAP 191**, dragging **electricity (29)** via
-   `_natural_fuel_for` — an electric boiler is unambiguously electric (ADR-0041
-   "direct-acting/storage → electricity"), and this also closes the pre-existing
-   gap where 191 dragged no fuel. Meter stays Single, control None (191 is neither
-   a storage nor a wet-boiler-control system).
-3. **Deterministic `main_heating_guard` + reclassify**, TEXT-first /
-   pgEnum-deferred. The guard resolves the structured phrasings by description
-   alone: `"…open fire … back boiler"` → 632 (tested before the bare `"open fire"`
-   → 631), `"…closed … with boiler"` → 634, and `"Boiler: <band> NA"` →
-   `"Electric boiler"` (the NA type is the electric signal). `scripts/
-   reclassify_gas_cpsu.py` reuses the guard as its decision function and defers the
-   four new `main_heating_system` pgEnum-cache values.
+2. **`"Electric boiler"` → SAP 191** and **`"Electric CPSU"` → SAP 192**, both
+   dragging **electricity (29)** via `_natural_fuel_for` — electric boilers are
+   unambiguously electric (ADR-0041 "direct-acting/storage → electricity"), also
+   closing the pre-existing gap where 191/192 dragged no fuel. 191 stays on a
+   Single meter; 192 (electric CPSU) is already in `_ASSUMED_DUAL_METER_CODES`, so
+   it drags an off-peak Dual meter (§12 Rule 1, 10-hour).
+3. **Deterministic `main_heating_guard` for the description-determined cases +
+   reclassify**, TEXT-first / pgEnum-deferred. The guard resolves the structured
+   phrasings by description alone: `"…open fire … back boiler"` → 632 (tested
+   before the bare `"open fire"` → 631), `"…closed … with boiler"` → 634, and
+   `"Boiler: <band> NA"` → `"Electric boiler"` (the NA type is the electric
+   signal). `scripts/reclassify_main_heating.py` reuses the guard as its decision
+   function.
+4. **Electric CPSU is fuel-determined, not description-determined.** `"Boiler: A/C
+   rated CPSU"` is identical bar the efficiency band, so the electric/gas split
+   cannot be read from the description — the guard cannot see it. The reclassify
+   therefore resolves it with a **fuel-aware, per-property** step (`electric_cpsu_
+   for(description, main_fuel)`): a CPSU boiler whose property carries a
+   `main_fuel = electricity` override → `"Electric CPSU"` (192); a gas / unknown
+   fuel stays Gas CPSU (120). Only the **TEXT** layer is updated for it — the
+   description-keyed classifier cache cannot represent a fuel-dependent value. The
+   **live** guard stays fuel-blind, so a new electric-CPSU intake (rare — 1 row in
+   the corpus) falls to the LLM rather than being silently mis-guarded.
 
 ## Consequences
 
-- ~95 rows leave the Gas CPSU garbage drawer for faithful archetypes: 37 solid
-  fuel scored as solid fuel (not mains gas), 58 electric boilers scored as electric
-  (not a mains-gas CPSU). Correct Rebaselining (ADR-0039).
-- **FE-owned pgEnum additions (Dan):** four new `main_heating_system` values —
+- 96 rows leave the Gas CPSU garbage drawer for faithful archetypes: 37 solid
+  fuel scored as solid fuel (not mains gas), 58 electric boilers + 1 electric CPSU
+  scored as electric (not a mains-gas CPSU); the 1 genuine gas CPSU stays on 120.
+  Correct Rebaselining (ADR-0039).
+- **FE-owned pgEnum additions (Dan):** five new `main_heating_system` values —
   `"Solid fuel room heater, open fire"`, `"Solid fuel room heater, open fire with
   back boiler"`, `"Solid fuel room heater, closed with boiler"`, `"Electric
-  boiler"`. TEXT read path fixed on merge; cache writes defer to the migration.
+  boiler"`, `"Electric CPSU"`. TEXT read path fixed on merge; cache writes defer to
+  the migration.
 - Extends [ADR-0041](0041-landlord-heating-classification-targets-a-complete-modellable-taxonomy.md)
   (complete taxonomy — retiring the Gas CPSU garbage drawer it named) and
   [ADR-0035](0035-coherent-heating-system-synthesis.md) (companions drag from the
@@ -78,12 +91,6 @@ Add the missing archetypes and reclassify the bucket. No calculator change.
 
 ### Out of scope
 
-- **Electric CPSU (SAP 192), the 1 `"Boiler: A rated CPSU"` row.** Its description
-  is identical to the genuine gas `"Boiler: C rated CPSU"` bar the efficiency
-  band — the electric/gas split is **fuel-determined**, which a pure-string guard
-  cannot see. Rather than break the guard = reclassify-decision-function symmetry
-  for one row, this is deferred to a small fuel-aware follow-up; the gas CPSU row
-  stays correctly on 120.
 - **Whether "NA" ever denotes a non-electric boiler.** It is 100% electric in the
   corpus and the guard treats it as electric; a future non-electric "NA" would be
   a re-open signal, not a silent mis-map (the fuel override would disagree).