- There are many types of companies offering cold room-related services in Hong Kong, with varying expertise from thermal insulation specialized companies, cold gas utility companies to special cold room engineering firms.
- refrigeration engineering companies should look at seven dimensions simultaneously: technical capacity, related experience, transparency of bids, equipment specifications, post-sale support, eligibility compliance and project management.
- Hong Kong does not have a single refrigeration engineering licence plate and the required qualifications are considered to be relevant to the work, such as electricity work and building changes.
- It is more reliable than a purely comparing total price by placing the bids in the same comparative table.
- Sustained police numbers: No inspection offers final prices, vague specifications, no written maintenance provisions etc.
Preamble: Is it too important for refrigeration engineering?
The cold room generally requires long and continuous operation, often with high-value goods such as frozen meat, seafood, pharmaceuticals or red alcohol. The design and construction quality of the cold room engineering company directly affects stability in temperature, high electricity costs and the frequency of future maintenance. Once a wrong contractor has been selected, the cold room may be often malfunctioned, even if it is to be broken down, with loss far beyond the cost of the work itself.
This paper does not refer to any particular company, but rather provides an assessment methodology that can be applied in practice to help you objectively compare the different refrigeration engineering companies.
Acquisition of what kind of work you need
The selection of the contractor is preceded by a clear understanding of what works it needs. The expertise of different companies differs:
| Your needs | Type of work | Relevant information |
|---|---|---|
| Induction cold room for restaurants, streets and shops | walk-in cold room engineering | Walk-in Cold Room Engineering and Installation |
| Vegetables, dairy products | chilled room engineering | Chilled Room Engineering and Installation |
| Unfrozen meat, seafood, emergency food | freezer room engineering | Freezer Room Engineering and Installation |
| Logistics, wholesale large refrigerated warehouse | refrigerated warehouse engineering | refrigerated warehouse and refrigerated warehouse engineering |
| Drugs, medical materials | Cold Storage Facilities | Cold Storage Facilities |
| Existing cold room leaked, closed | insulation work | Insulation Work and Cold Room Materials |
| cold room malfunction or periodic inspection | cold room repair/maintenance | Cold Room Repairs、cold room maintenance |
Insulation work, refrigeration engineering, refrigerated warehouse works and cold room works can be consulted.Insulation, Refrigeration and Cold Storage: A Complete Comparison。
Five types of refrigeration engineering contractors, Hong Kong
| Type | Main expertise | Advantages | Need for retention | Eligible |
|---|---|---|---|---|
| Specialized cold room engineering company | cold roomthermal insulation, refrigeration system, cold room maintenance and repair | Simultaneously familiar with thermal insulation and refrigeration, one-stop approach | Identifying experiences with relevant scales | chilled room,freezer room,walk-in cold room, refrigerated warehouse,cold storage facility |
| thermal insulation/seat specialized company | pithermal insulation, heat of equipment, building insulation | thermal insulation construction profession | The cold room refrigeration component may need to look for another contractor | Pithermal insulation, heat of equipment |
| Refrigeration Electricity Company | Air conditioning system, electrical engineering | Electrical power integration capacity | Zero refrigeration experience varies from company to company | Switches, commercial chillers |
| Vendor of kitchen equipment | Commercial appliances, plutonium | Coupled with the overall kitchen design | Large cold room or refrigerated warehouse experience is not necessarily sufficient | Smallwalk-in cold room, kitchen equipment |
| Large integrated engineering carriers | Large engineering project management | Sufficient resources for large projects | The refrigeration component may be re-examined | Large logistics centres |
refrigeration Engineering, seven dimensions
1. Technical capacity
- Is there a concurrent familiarity with insulation work and refrigeration systems?
- Can the refrigerant be explained how it is calculated?
- Can programmes be proposed for details such as floor defences, door cracks and pressure balances in the no-zer room?
2. Relevant experience
- Are there works similar to you, such as the cafeteria walk-in cold room, food refrigerated warehouse or pharmaceutical stores?
- AccessibilityProject galleryClient type?
3. Transparency in quotations
- Is the price specified and quantified on a casebycase basis?
- What are the items included, which are counted and clear?
4. Equipment and material specifications
- insulated panels, thickness and surface material
- refrigeration unit brand, model, refrigerant
- Is it easy to find spare parts and maintenance support locally
5. Post-sale support
- How long does the maintenance period cover very much?
- Are regular maintenance services provided?
- How can the failure be contacted and generally so fast?
6. Qualification and compliance
- Would electricity work be done by qualified personnel?
- Are the relevant requirements known in relation to building changes?
7. Communication and project management
- Do you go to the gate and foot?
- Can an engineering schedule be provided?
- Are there clear focal points?
weighted scores: quantifiable comparison of companies
You can set weights in accordance with your own needs, then each firm rating (1 to 5 minutes) by weight. The following is a reference weight, which can be adjusted on its own:
| Assessment of variability | Reference weight | Companies A (1–5) | Companies B (1–5) | Company C (1–5) |
|---|---|---|---|---|
| Technical capacity | 20% | |||
| Relevant experience | 15% | |||
| Transparency in quotations | 15% | |||
| Equipment and material specifications | 15% | |||
| Post-sale support | 15% | |||
| Qualification and compliance | 10% | |||
| Communication and project management | 10% | |||
| Total weighted | 100% |
Examples of calculations:A company ' s technical capacity is 4 minutes, by 20% equal to 0.8 points; Seven weighted scores were added and divided into five. Enterprises that store high-value goods can reassert the weight of the backbone after its sale; Shops with budgetary constraints can increase transparency in quotations.
12 issues to be asked before the elections
- Is your visits and foot?The price of field visits is not quoted and usually only estimated.
- How is the refrigeration calculated?Professional contractors should be able to indicate which heat loads were considered.
- Insulated panels are very material, thick and very visible?
- Is the refrigeration unit ' s brand, model, refrigerant?
- How can the freezer roomfloor deal withthermal insulation and unfrozen?
- There are cold room gates without door-box heating, safe openings in the bank and pressure balance?
- Electricity engineering packages? Who is doing?
- Are there temperature records and warnings?This item is particularly important if a non-freezer room licence is required.
- How long does the work take?
- How long does it cover?
- What are the arrangements and fees for future regular maintenance?
- There are cases where similar works are not available?
Qualifications and regulations relating to Hong Kong
Many would ask: Would ⁇ refrigeration Engineering have very bad licenses? In Hong Kong, it does not have a single host license called ⁇ refrigeration engineering licence. Qualifications for cold room engineering requirements, depending on the content involved in the work:
| Engineering content | Relevant regulations/systems | Authorities |
|---|---|---|
| Electricity work in fixed-power installations (e.g., electrical circuits, cables) | Electricity Regulations: Generally, a registered electrical engineering worker hired by Registered Electrical Contractor is required to perform | Electrical and Mechanical Services Department |
| Changes to the building structure, channel or outer wall | Buildings Regulations and Small Engineering Regulatory System: Depending on the type of work, it may be necessary to register Milor Works Contractor or registered contractor | Buildings Department |
| Storage of designated food for commercial use in non-freezer room | freezer room licence: operator is required to claim; Standard licensing conditions include fixtures equipped with accurate automatic recording of temperature | Food and Environment Agency |
| refrigerant | Regulation of controlled substances under the Regulations for the Protection of the Ozone Layer | Environmental Protection Agency |
Professional level in equipment specifications
Type of compressor
| Type | Common applications | Special characteristics |
|---|---|---|
| Cyclone (Scroll) | Small and medium-sized chilled room,walk-in cold room, freezer room | Operation smoother and less spare parts |
| Semi-hermetic Reciprocating) | Medium cold room, freezer room | Coil-refrigeration is available on site and is common |
| Screw | Large refrigerated warehouse, industrial ref | Large volume of refrigeration suitable for large systems |
Professional refrigeration engineering companies should explain why some compressors, how the refrigerant works with cold room size and which type of refrigerant is selected. Comparison of additional equipment programmes, for referencerefrigeration large comparison of engineering costs in Hong KongThe content includes as one and plating machines, fixed-frequency and variable frequency, refrigerant selection, etc.
thermal insulation specifications
The professional contractor shall be able to recommend the thickness of the panels in accordance with the target temperature and indicate the sealing, heat bridge processing and floor practices. Custody of common taboosCold roominsulation work for 10 hidden issues。
Model statement of comparison of prices
The differences in the specifications can be clearly observed by filling the respective bids into the same table:
| Item | Company A | Company B | Company C |
|---|---|---|---|
| cold room size and temperature | |||
| insulated panel materials/thickness/surface | |||
| floorthermal insulation and protection | |||
| cold room type and accessories | |||
| refrigeration unit brand/type/ref | |||
| refrigerant | |||
| Electricity engineering | |||
| Water drainage and heating | |||
| Temperature records and alerts | |||
| Transport, cooking, demolition and old | |||
| Period of work | |||
| Maintenance period and scope | |||
| Total price |
For information to be prepared prior to the offer, seeChecklist of information on bids; Factors affecting money, seeCold room price impact factor。
Elements of a contract
- Scope of work:Clarify which components include design, procurement, installation, testing and delivery
- Annex to the specifications:insulated panels, refrigeration unit, cold room door etc. as annex to the contract
- Period of work:Start and completion date, as well as delayed arrangements
- Payment arrangements:Disbursements by progress of work and avoidance of lump-sum payments
- Receiving and inspection standards:For example, reduced to the target temperature within a reasonable time and maintained stability
- Maintenance provisions:Maintenance duration, coverage and exclusion
- Change mechanisms:How, if any, the prices and confirmations are required during the work
List of police
In the following cases, more should be done:
- In the absence of an inspectorate, the final price of the copper was given.
- The price is only a cold room copper, without any specification.
- Refrigeration unit brand and type
- Explanation of how the refrigerant is calculated
- The price is significantly lower than that of other companies, but it is not justified
- Required lump sum
- No provision for written maintenance
- In the case of electricity work, it was not possible to indicate that a qualified person was engaged in the exercise.
- freezer room price does not refer to floor defence, gate heating or drain pipe heating
Comparison of post-sale maintenance and maintenance support
The cold room is a long-functioning equipment, and post-sale support is less important than the work itself. In comparison, it may be left to the following:
| Comparative projects | It is clear to ask questions |
|---|---|
| Maintenance period | How long? Does it cover spare parts, manual work or both? |
| Regular maintenance | How long? Is it? How to charge? |
| Maintenance of malfunctions | How can it be reported? How quickly technical staff are generally arranged? |
| Spare parts supply | Is it easy to obtain the usual spare parts? |
| Maintenance records | Is the maintenance report available? |
Acquisition projects for maintenance of the cold room can be consultedCold Room Maintenance and Routine Refrigeration Inspections。
on Kam Hing Engineering
Kam Hing Engineering and Trading Co. Limited (Kam Hing Engineering " Trading Co. Limited) is professionally engaged in various types of cold room, thermal insulation and maintenance works, including large pharmaceutical warehousing, logistics warehouses, Wine cellar and food refrigerated warehouses, including project design, procurement, installation, periodic inspection and repair.
Clients are scattered in large staple foods, business management companies, hotels, businesses and government agencies. In addition to cold room works, we are carrying bar refrigeration and electricity projects, cold-frozen gas and electrical works in the restaurant, refrigerated gas and electric works in commercial and writing buildings, as well as maintenance of ice pumps and shops in the neighbourhood.
More:About us｜Services｜Our clients｜Project gallery。
Common issues
Is there a refrigeration engineering licence in Hong Kong?
Hong Kong does not have a single host licence called ⁇ refrigeration engineering license. The qualifications required are subject to the engineering element, such as the work of a fixed power unit to be performed by a registered electric engineering staff employed by Registered Electrical Contractor; Changes to buildings may be subject to a small engineering supervision system in Buildings Department; Non-freezer room for the commercial storage of designated foods, and operators are required to claim a non-zer room licence from EFA.
How can the different refrigeration engineering companies be compared?
The seven-dimensional comparisons of technical capacity, related experience, transparency in the presentation of prices, equipment specifications, post-sale support, eligibility compliance and project management can be established with weight ratings as needed by themselves. For further detailsweighted scores。
Should a cold gas company or cold room engineering company be found to be freezer room?
The freezer room involves specialized technologies such as zero lower temperature, low temperatureinsulated panels, floor defences, doorbox heating, drainage heating and nitrogen system, which are generally more appropriate for companies familiar with cold room works.
How should the refrigeration engineering company ' s bids be judged?
Incorporation of bids into the same comparative table, checking specifications and including projects on a case-by-case basis. Gaps often come from specifications or ranges. For further detailsModel statement of comparison of prices。
Is there a very high number of warnings when Cold room engineering companies are selected?
For example, the final price of non-examination visits, no specification of the offer, refusal to provide an equipment type, requirement for a lump-sum payment, absence of written maintenance provisions etc. For further detailsList of police。
Summary
The refrigeration engineering company should not be selected only to compare money, but rather from technical capabilities, experience, transparency in bids, equipment specifications, post-sale support, eligibility compliance and multiple assessments of project management. The use of weighted scores and quotations comparing tables to clarify the key issues of article 12 and to retain police numbers would allow for a more objective finding of suitable cold room engineers.