Light Commercial Air Conditioning
Small offices, retail shops, dental clinics, restaurants – all of these places need air conditioning, but their scale isn’t big enough to warrant the installation of a massive industrial-sized AC. However, at the same time, a standard wall-mounted heat pump just doesn’t cut it.
That’s what light commercial AC is for. These types of systems are built specifically for small businesses and are precisely what you need for your establishment.
At Varcoe, we’ve installed light commercial systems across Auckland since 1975, so we understand what small businesses actually need versus what gets oversold to them. Here’s what you need to know about these machines!
What Counts as Light Commercial
Typically, any space under 200m² with standard office or retail use is considered “light commercial”. There may be 10-20 people working there at normal business hours. All an AC has to do is keep everyone in the room nice and comfortable, nothing extreme like the cooling needs of manufacturing or data centers.
Why It's Different From Home Systems
Home units are sized for bedrooms and lounges. Light commercial spaces are bigger, have more people in them (so more heat), and run longer hours. A 5kW wall unit might be fine for your lounge. It won’t handle a 50m² office with 8 people working on computers and talking on phones all day.
Light commercial systems are built tougher. They run longer, handle more stress, use heavier-duty refrigeration, and have more sophisticated controls because you might need different zones or time-based scheduling.
Multi-Zone Control
Most light commercial setups have multiple zones. Maybe your front desk is one zone, your back office is another. Maybe your retail floor is separate from your storeroom. Each zone can be controlled independently or scheduled differently.
Front desk gets standard office temperature. Storeroom can be set warmer. After hours, everything drops to maintenance temperature to save power. You’re not paying to cool an empty back room while you’re open up front.
Installation and Design
We do a proper assessment: space dimensions, occupancy, equipment (computers generate heat), sunlight exposure, and insulation level.
Then we design a system that actually handles your needs. Could be a multi-split setup, a ducted system if your building suits it, or a combination.
Most light commercial installations take 2-3 days depending on complexity. We’ll discuss disruption before we start because you’re still running your business.
Cost Reality
Light commercial systems cost more than home systems, but not massively. You’re probably looking at $5,000-$15,000 installed depending on size and complexity.
That sounds like a lot until you realize it’s an investment that lets your staff work comfortably, keeps customers comfortable in retail spaces, and protects equipment that costs way more.
Running Costs
Well-designed light commercial systems are efficient. They ramp up and down based on actual demand rather than running all-out constantly.
Your power bill depends on usage, climate, and how tightly you control temperature. Generally we’re talking $100-300/month during summer depending on your space and settings.
Common Setups We Install
| Business Type | Typical Setup | Why This Works |
|---|---|---|
| Retail shops | Multi-zone system | Sales floor and stockroom have different schedules. Higher capacity handles customers, staff, and heat from lights and till systems |
| Medical/dental | High-reliability systems with backup capacity | Can't have AC fail during patient appointments. Time-based scheduling for pre and post-hours |
| Small offices | Combination: wall units + ducted supply | Individual zones for different temperature preferences between departments. Ducted for common areas |
| Cafés/restaurants | Higher capacity with humidity control | High heat load from cooking equipment. Needs more capacity than square footage suggests. Open kitchens add moisture |
Frequently Asked Questions
If my business is growing and I might expand to a larger space, should I oversize my current AC system to prepare for growth?
No. Oversizing wastes power and money now for a hypothetical future. Instead, choose a system that handles your current space properly, then discuss scalability with your installer. Multi-split systems can often accept additional zones if you move to a larger space. It’s better to size right today and upgrade when actual expansion happens.
Can I use standard residential heat pumps instead of light commercial units to save money?
Not really. Residential units aren’t designed for the operating hours, occupancy levels, or continuous stress of commercial use. They’ll underperform, fail faster, and you’ll end up spending more on repairs and energy. Light commercial systems cost more upfront precisely because they’re built for this duty cycle.
What if only one part of my business is uncomfortable – can I install AC just in that zone instead of the whole space?
Yes. You can start with one or two zones and add others later if needed. A phased approach lets you manage costs and see if the initial installation solves the problem before committing to full coverage. Discuss this during the assessment – we can design a system with expansion potential built in!
How often do I actually need to service a light commercial AC system – quarterly sounds like a lot?
Quarterly is recommended during heavy-use seasons (summer for cooling), but annual minimum is really the baseline for most businesses. If your system runs 24/7 or handles high loads, quarterly makes sense for longevity. Light use? Annual servicing usually suffices. We’ll recommend the right schedule based on your specific usage patterns.
My restaurant has poor ventilation and cooking heat – is AC alone enough, or do I need dedicated ventilation too?
AC helps, but commercial kitchens really need both: dedicated exhaust ventilation to remove cooking vapors and heat, plus AC to condition the dining and service areas. An AC system alone will struggle with constant kitchen heat generation and won’t address moisture and odor properly. Discuss your kitchen setup with us during assessment – we can recommend the right combination.
Let's Talk About Your Space
Every business is different. What works for a retail shop doesn’t work for an office. What one café needs, another doesn’t.
Give us a call at 0800 088 888 (or email quotes@varcoe.co.nz) and tell us about your business, your space, what’s uncomfortable, and we’ll figure out what makes most sense for you.