Record the site use, area and height, zones, occupancy, operating hours, sunlight, equipment, ventilation, power and possible future changes. Then discuss Split, Cassette, Ductable or VRF after reviewing the site.
Start with how the site will be used
Showroom lighting and frequently opened doors, office occupancy, separate hotel-room usage and an institution’s timetable can all change the cooling requirement. Collect the following information before asking for a proposal.
- Site use, approximate area and ceiling height
- Floors, rooms and zones that need separate control
- Peak occupancy and daily operating hours
- Sun-facing glass, exposed roof, kitchen, equipment and lighting heat
- Existing ACs, available power and backup arrangements
- Fresh-air, ventilation and site constraints
- Possible future layout or area changes
Four common starting options
Split or Inverter Split
May suit a separate cabin, room or small independent zone. For several rooms, also consider outdoor-unit space, controls and visible piping.
Cassette AC
Can be considered for multi-directional airflow in an open space with a false ceiling. Check ceiling space, drainage and service access.
Ductable AC
Can distribute air through concealed ducts. Review the duct route, ceiling space, zones and airflow design.
VRF
May suit a larger site with several zones and different cooling needs. Ask for written details on layout, controls, piping, service access and long-term upkeep.
Why a site review matters
Floor-plan area does not show the complete cooling load. Glass, roof exposure, lighting, occupancy, doors, equipment, ventilation and operating hours can change both capacity and system design. Site constraints also affect installation and future service access.
Information needed for a useful proposal
- Show rooms and zones on a floor plan or simple sketch.
- Record each zone’s use, timing and peak occupancy.
- Identify heat-producing equipment, large glass areas and exposed roofs.
- Describe constraints for installing or servicing indoor and outdoor units.
- Share the existing power and AC arrangement and future expansion plans.
- Review equipment, installation, piping or ducting, electrical and civil work, controls and maintenance separately in the quotation.
Do not decide from the initial price alone
Comfort across zones, separate controls, daily usage, installation access, service access and long-term upkeep also matter. Ask for a written comparison instead of relying on a universal energy-saving percentage or earnings claim.
Sources and review status
This guide provides general information to help you plan an AC purchase or installation. Make the final decision using current Hitachi information, the selected model’s documents and the actual conditions at your property.
Technical review: Pending. We have not named a reviewer, qualification or review date until that review is complete.