Fan Coil Unit Selection Guide for Different House Types
The core logic of fan coil unit selection is to match the building's spatial structure, usage scenarios, and living needs . Different house types, ceiling heights, and functions have vastly different requirements for fan coil unit installation methods, static pressure, noise levels, cooling and heating capacity, and piping patterns. Accurate selection based on house type ensures effective temperature control and living comfort while avoiding problems such as wasted space, excessive energy consumption, and noise pollution. The following is a detailed and complete selection standard categorized by mainstream house types.
I. Ordinary residential housing
Typical residential buildings have the following characteristics: floor height is generally 2.7–2.9m, space is clearly divided (bedroom, living room, kitchen, bathroom ), single room area is 10–30㎡, the core requirements are quietness, energy saving, no oppressive feeling, and compatibility with home decoration, and no need for high-intensity continuous temperature control.
Ultra-thin horizontal concealed mounting (the mainstream choice) is preferred , with a body thickness of ≤23cm. It is suitable for low ceilings in ordinary residences, with only the air vents exposed, matching the home decoration style and not taking up indoor space. For small apartments without ceilings, horizontal exposed mounting can be used , which does not require ceiling modification and is suitable for installation after renovation. For apartments with large living rooms and no complicated ceilings, card-type ceiling recessed mounting can be selected , providing airflow without dead angles and with a higher aesthetic appeal.
Choose 2.5–3.5kW for bedrooms (10–18㎡); 3.5–5kW for master bedroom/small living room (18–25㎡); and 5–7kW for large living and dining room (25–35㎡).
II. Large-sized residential units (apartments, detached villas)
Features of villas and townhouses: floor height 2.9–3.5m, large single-story area, multiple high-ceiling spaces, complex functional zoning (tea room, media room, basement, terrace room), poor ventilation in some spaces, uneven heating and cooling loads. The core requirements are uniform air supply, zoned temperature control, suitability for large spaces, and quiet and stable operation .
For standard rooms, ultra-thin horizontal concealed installation is used ; for high-ceilinged living rooms and extra-large halls (≥40㎡), medium-high static pressure horizontal concealed installation with short air ducts is preferred, which can extend the air outlets to achieve temperature control throughout the area; for basements and damp storage rooms, waterproof and moisture-proof horizontal concealed installation is used to avoid moisture corrosion of equipment; for open, ceiling-free leisure areas, cassette-mounted embedded installation is suitable, providing 360° air supply and wider coverage.
Bedrooms should maintain a noise level of 35dB or less; basements should prioritize models with anti-mold and dehumidification functions to suit humid and enclosed environments; sunrooms and terrace conversions have high cooling and heating loads and require upgrades to high-capacity models, with a 10%–20% load margin.
III. Commercial properties (office buildings, offices, shops)
Commercial buildings are characterized by high ceilings, open spaces, high population density, frequent opening and closing of doors and windows, large fluctuations in heating and cooling loads, and the need for continuous operation over long periods. The core requirements are rapid temperature control, large air volume, durability, adaptability to multi-zone air supply , and lower noise requirements than residential buildings.
1. Office buildings (single offices, open-plan office areas)
- Small single office (≤25㎡): Low static pressure horizontal concealed installation, standard air volume, meets daily office temperature control needs, and offers high cost performance.
- Large open-plan office areas and meeting rooms (≥40㎡): High static pressure models (50–80Pa) are selected , which can be connected to long air ducts and multiple air outlets to achieve uniform air supply over a large area; priority is given to high-configuration heat exchange with 3 rows of pipes to cope with the high load brought by dense personnel and rapid temperature rise and fall.
- Noise standards can be relaxed to 40–45 dB, with priority given to ensuring airflow and cooling efficiency.
2. Street-front shops and stores
- Small shops (≤30㎡): Card-type embedded fan coil units are easy to install, provide uniform airflow, have a high aesthetic appeal, and are compatible with store decoration, eliminating the need for complex ceiling installations.
- Large shopping malls and street-front shops (≥50㎡): High static pressure horizontal concealed installation + duct diversion, suitable for large spaces and high customer flow with high cooling and heating loads, and supports long-term uninterrupted operation.
- Two-pipe systems are preferred for pipelines, while four-pipe systems can be used for commercial complexes with high customer traffic and complex business formats to meet the temperature control needs of different shops.
IV. Special Function Buildings (Hotel Rooms, Hospitals, Renovated Old Buildings)
1. Hotel rooms, guesthouses
The core requirements are extreme quietness, concealed aesthetics, and low failure rate. Ultra-low noise horizontal concealed installation is uniformly selected , with operating noise ≤32dB, eliminating complaints about abnormal noises in guest rooms; standardized room layouts are compatible with low static pressure models , and a two-pipe system can meet seasonal temperature control requirements. The equipment is compact in size, does not occupy ceiling space in guest rooms, and is convenient for unified maintenance.
2. Hospital wards and health and wellness facilities
We prioritize the use of quiet, temperature-controlled, and antibacterial/ mildew-proof horizontal concealed fan coil units , which are less prone to bacterial growth inside the unit and are suitable for medical clean environments. When paired with a two-pipe or four-pipe system, the temperature control is precise and has small fluctuations, supporting 24-hour continuous and stable operation without high-frequency start-stop noise, making it suitable for recuperation scenarios.
3. Old houses and renovated houses
For most buildings without complete ceilings or with limited wall structures, horizontal or vertical exposed models are preferred, as they do not require demolition or alteration of ceilings or walls, making construction convenient and cost-effective. High static pressure models should be avoided as they do not require ductwork connection, reducing the amount of renovation work. The selection should be streamlined based on the actual room size to suit the small spaces of older houses.
