Laoliu Healthy Mansion writes the target values, test standards, test conditions, and pass/fail methods for temperature, humidity, CO₂, noise, formaldehyde, and other metrics into the contract annex. Before handover, a third party holding CMA accreditation re-tests the home; anything that falls short is remediated and re-tested as agreed, and the system carries a 3-year warranty.
Six: temperature, humidity, CO₂, formaldehyde and particulate matter, noise, and drinking-water TDS. Each one states a target value, the standard number it is measured against, the test conditions, and the pass/fail method. The test-conditions column is the one that matters — in the same house, formaldehyde measured with every window open and with windows closed for one hour can differ by a factor of two. Leave the conditions out, and whether the home passes becomes a matter of opinion.
Six: temperature, humidity, CO₂, formaldehyde and particulate matter, noise, and drinking-water TDS. Each one states a target value, the standard number, the test conditions, and the pass/fail method.
The test-conditions column is the one that matters. In the same house, formaldehyde measured with every window open and with the windows closed for one hour can differ by a factor of two. If the contract does not state the conditions, whether the home passes becomes a matter of opinion.
| Metric | Contract value | Basis for determination |
|---|---|---|
| Temperature | 22–24℃, with ≤2℃ variation across the home | GB 50736, measured in each room after the system has run stably for 24h |
| Humidity | 50±5% | GB/T 18883-2022, logged continuously over 24h |
| CO₂ | ≤800ppm, no more than 500ppm above outdoor levels | GB/T 18883-2022, at design occupancy in active use |
| Formaldehyde | ≤0.06 mg/m³ | GB/T 18883-2022 (limit 0.08), sampled with windows closed for 1h |
| Noise | ≤30 dB(A) at night | GB 50118, measured at the center of the room during night hours |
| TDS | ≤10 | Sampled at the tap, tested with a portable meter or in a laboratory |
The above is a summary of the metrics set out in the contract annex; the signed contract text prevails.
Testing is carried out by a third-party organization holding CMA accreditation. The list of organizations is confirmed at signing and agreed by both parties, and the testing fees are included in the contract price. We use a third party rather than issuing our own report so that the result can be contested — the owner may commission another organization to re-test, and the two results together serve as the basis for determination.
Testing is carried out by a third-party organization holding CMA accreditation. The list is confirmed at signing and agreed by both parties. The testing fees are included in the contract price and are not paid separately by the owner.
We use a third party rather than issuing our own report so that the result can be contested — if the owner disputes it, they may commission another CMA-accredited organization to re-test, and the two results together serve as the basis for determination.
Four steps: diagnosis (establish whether the cause is the system, the installation, or materials the owner bought), remediation (where it falls within our scope, at our cost), re-testing (a new CMA-accredited organization, again at our cost), and a backstop (if two rounds of remediation still miss the target, the contract's liability terms apply). Diagnosis comes first because the cause is not always the system itself.
Four steps, all written into the contract:
Diagnosis comes first because a failed reading is not always the system's fault. Insufficient airtightness in doors and windows, ongoing emissions from furniture the owner bought, and seasonal conditions all affect the result. The contract assigns responsibility for each of these.
The commitment is this: mold caused by the system — within the scope we delivered and with the system running as designed — is our responsibility under the contract. Outside that scope are structural leaks and exterior-wall seepage, prolonged shutdown, power loss, or manual switch-off of the system, modifications the owner makes to the system, and finishes using large amounts of organic material.
What we commit to:Mold caused by the system — within the scope we delivered and with the system running as designed — is our responsibility under the contract.
This commitment does not extend to:
It covers equipment failure, installation defects, control-system faults, and any shortfall in performance caused by them. It does not cover consumables such as filters, damage caused by the user, force majeure, or faults arising from modifications the owner makes. Response times depend on the severity of the fault: anything affecting basic habitability is handled first; anything that does not affect use follows the standard schedule.
Covered: equipment failure, installation defects, control-system faults, and any shortfall in performance caused by the above.
Not covered: consumables such as filters, damage caused by the user, force majeure, and faults arising from modifications the owner makes. The detailed list and response times are set out in the contract annex.
Response times depend on the severity of the fault: anything affecting basic habitability, such as a fresh-air shutdown or a leak, is usually handled first; anything that does not affect use, such as a single faulty sensor, follows the standard schedule.
The contract sets out an escalating path: negotiation, third-party re-testing, then litigation or arbitration. In practice the most effective step is to define, before any dispute arises, how a result is judged: the standard number, the test conditions, the number of sampling points, and the pass/fail method. Nail down those four and most disputes never happen.
The contract sets out an escalating path: negotiation, third-party re-testing, then litigation or arbitration.
In practice the most effective step is to define, before any dispute arises, how a result is judged: the standard number, the test conditions, the number of sampling points, and the pass/fail method. Nail down those four and most disputes never happen — because the result can be verified.
From the date the handover acceptance is signed. If remediation or re-testing delays acceptance, it starts from the date the home finally passes testing.
Yes, as a paid service. Filter replacement, parameter recalibration, and equipment servicing can each be commissioned separately.
It can be negotiated. Equipment warranties are usually capped by the manufacturer's warranty period, so anything beyond that needs a separate agreement.
That is a reasonable concern. At handover we transfer the complete drawings, the photographic record of concealed works, and an equipment schedule — enough for a third party to take over maintenance. Equipment is also specified to common standards rather than tied to a single supplier.
Yes. The original test reports, system drawings, the photographic record of concealed works, and the operations manual are all transferred at handover.
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