File-backed graph · SQLite + notes + jsonl · Neo4j not running
Southern Heat Pumps / Engineer: water heater · Lexington · quest only
Quest design a novel heat pump water heater for the US and Canada that uses AI to maximize efficiency.
Product research brief. Not a sales sheet. Figures are from vault.db after ingest A–D (16 Aug 2026). Disagreements are left standing. No Decision nodes. No CAD.
00
Verified against vault.db. 55 works = 6 research reports + 9 scratches + 40 primary sources (including stubs). 289 claims, 28 concepts, 14 parts, 19 markets, 441 edges.
Counts as stored. Claims dominate because each work asserts load-bearing sentences.
6 research reports · 9 scratches · 40 primary sources, including stubs.
441 edges: 289 asserts, 51 about, 41 sourced_from, 26 applies_to, 25 cites, 9 disputes.
| Node | Present | Edge | Count |
|---|---|---|---|
| Work | 55 | asserts | 289 |
| Claim | 289 | about | 51 |
| Concept | 28 | sourced_from | 41 |
| Part | 14 | applies_to | 26 |
| Market | 19 | cites | 25 |
| Standard, Source | in graph | disputes | 9 |
| Assembly | none | ||
| Decision | none |
01–04
The spine of the corpus. Wording below is the vault’s, not a paraphrase that would smooth tensions.
Layer 1
A comfortable shower is 15–25 kW. No residential heat pump and no 30 A circuit can supply that live. The machine must store, burn gas, or the shower is worse.
DOE UEF test assigns daily volume from first-hour rating (10 / 38 / 55 / 84 gal), not from field measurement.
Conversion used in the third-pass: kW = gpm × ΔT(°F) × 0.1465
Layer 2
Heaters are local machines.
Not a ranking. Stock ≠ annual shipments ≠ cumulative shipments. Canada SHEU 2019 is quality M. Eco-cute 10 M is cumulative shipments to Mar 2025, not remaining stock. US 190k is 2023 HPWH shipments.
| Place | Figure | What it is | Quality flag |
|---|---|---|---|
| Canada | 12.4 M | heaters, SHEU 2019 stock | quality M |
| Canada | 10.8 M | tanks, SHEU 2019 stock | quality M |
| Japan | 10 M | Eco-cute cumulative shipments to Mar 2025 | not remaining stock |
| US | 190k | HPWH shipments, 2023 | shipments, not stock |
| Canada | 34k | HPWH, SHEU 2019 stock | quality M |
Layer 3
Night-charge regimes (Australia ripple, Japan 深夜電力, France HP/HC) are being inverted toward solar noon.
CTA-2045 / EcoPort is the North American port.
IEEFA: hot water ~¼ of Australian household electricity; AGL 140 MW via PLUS ES.
Layer 4
After 6 May 2029, common-sized US electric storage must meet heat-pump UEF.
FR 89 FR 37778: 17.6 quads, 332 Mt CO2, share 3% (2023) → ~61% (2030, TSL 2).
The volume machine is an A. O. Smith Juárez glass-lined tank, Highly-class China rotary, R-134a, 4.5 kW backup elements, Wise Ally / Computime controls, optional EcoPort.
Glass-lining furnace is the non-electronics CAPEX bottleneck.
05
Fourteen Part nodes. Country of origin unpublished unless a filing names it. co2-outdoor is Voltex X, not 2026 volume.
rotary-compressorrotary compressor (Highly-class R-134a)glass-lining-furnaceglass-lining / enamel furnacesteel-coilsteel coilmg-anodemagnesium sacrificial anodewrap-condenserwraparound / hotwall condenserevaporatorevaporator (Changfa-class)eevelectronic expansion valveelement-4-5kw4.5 kW backup / tank elementr134a-chargeR-134a sealed-system chargecontrol-assemblyHPWH Control Assembly (Wise Ally / Renesas)computime-controllerComputime water-heater controllerwifi-moduleWi-Fi module (Murata LBEE5PA1LD-222 / FCC 2BWHU1LD)ecoportCTA-2045 EcoPortco2-outdoorPanasonic CO2 outdoor (Voltex X, not 2026 volume)Grant 23 Jul 2026, Murata LBEE5PA1LD-222, 2412–2462 MHz, 0.03589 W, Wi-Fi only, single modular. Host unpublished. Not proven inside current HPTS.
“1LD-Ayla / CYW43438 + STM” and Bluetooth are not in the exhibits. UseCARE 2025 still prints Wi-Fi+Bluetooth on the Control Assembly.
Product page says NEEA Tier 3; QPL says HPTS-50/66/80 Tier 4, EcoPort Yes, UEF 3.80 / 3.70 / 3.88.
Highly 29, China WH 22, Computime 13, Time Engineering 12. Changfa ships evaporator and clip.
Do not claim USMCA origin; RVC unpublished.
06
Each pair is a disagreement or a quality break. Do not average. Do not pick a winner. The 9 disputes edges live here as readable pairs.
NOPR 27 quads
vs
Federal Register 17.6 quads
HPTS page “NEEA Tier 3”
vs
QPL Tier 4
Table UEF 3.8 / prose 3.88
vs
QPL 3.80
2016 handbook heat-pump floor 45°F
vs
2024 handbook / UseCARE 37°F
Reports “~95% of HP compressors”
vs
HPM “~90% of rotary manufacturing capacity”
REN21 China 391.8 GWth
vs
SHWW 410.1 GWth
Brazil viral 70% electric shower
vs
that figure is 2005, not 2019
Eco-cute “close to 15%” stock phrase
vs
not found in extracted HPM pages
15–20 kg copper
vs
flagged as air-to-air space HP, not HPWH
TSD Chapter 5 dollars never arrived (download stubs)
vs
$207.87 / $446.41 / $479.57 / $526.86 stay with the already-opened TSD in the reports
South Africa GHS 2023/2024 are Incapsula stubs
vs
3.3% solar geyser unconfirmed
Several ImportInfo supplier pages are login walls
vs
APCOM, Morita, Heatec, Thermalub, Water Products, Qiaoyun
07
08
Intended stack (not running as a graph): Neo4j backbone; Blender / FreeCAD / OpenSCAD for geometry. Until then the store is file-backed: vault.db, notes/, graph/*.jsonl.