Commercial HVAC air conditioning system South Africa

HVAC Filters for Contractors: G4 and F9 From Local Stock, Trade Accounts

Commercial HVAC systems in South Africa typically run a two-stage filtration setup: a G4 panel filter at the front of the AHU to catch coarse dust, and an F9 pocket filter behind it to handle the fine particles that affect indoor air quality. Prebur supplies G4 and F9 filters manufactured to EN779 in the standard AHU sizes, from stock in Silverton, Pretoria. We also carry V-Bank filters for larger systems where energy efficiency matters. Trade accounts, monthly invoicing, and stock ringfenced for your contract sites. Call Nick on +27 74 159 1634 for availability and pricing.

Two-Stage HVAC Filtration

Stage 1: G4 Panel Filter. The first filter in the AHU. It catches the coarse stuff (construction dust, pollen, fibres) and protects everything downstream. If this filter is not replaced on time, the secondary filter picks up the extra load and its service life drops significantly.

Stage 2: F9 Pocket Filter. The second filter handles the fine particulate: the particles you cannot see but that affect air quality in occupied spaces. This is the filter that matters for indoor air quality in offices, hospitals, and commercial buildings.

Replace the G4 on schedule and the F9 lasts its full service life. Neglect the G4 and you end up replacing the F9 twice as often.

Why HVAC Contractors Choose Prebur

Trade accounts. Monthly invoicing, consistent pricing, no credit card friction. Available for registered contractors.

Ringfenced stock for contract sites. Filters on a maintenance schedule can be reserved against your contract, so the stock is there when your service visit is due. Scheduled deliveries can be tied to your service intervals.

Collection from Silverton. Our warehouse at 229 Dykor Street, Silverton, Pretoria is accessible from the N1 and N4 corridors, approximately 35 minutes from Sandton. Call ahead and same-day collection can usually be arranged.

A supplier who will not compete for your end client. Prebur supplies contractors; your client relationship stays yours.

37 years supplying South African HVAC contractors.

Call Nick Els directly on +27 74 159 1634. He can confirm grades, sizes, availability, and technical questions (pleat count, edge bonding, frame material) on the spot.

Recommended Products for HVAC Contractors

G4 · EN779

Panel Filters

595×595×48mm. AHU pre-filtration standard.

View → F9 · EN779

Pocket & Bag Filters

595×595×330mm. Secondary filtration ≥95%.

View →

Common Questions

What EN standard should HVAC filters meet in South Africa? +
Commercial HVAC filters should be manufactured to EN779:2012: G4 panel pre-filters at average arrestance ≥90%, F9 secondary filters at average efficiency ≥95% at 0.4µm. HEPA terminal filters (used in operating theatres, cleanrooms, and critical care) are individually tested to EN1822 and ship with serial-numbered test certificates on both H13 and H14. Note: per-unit test certificates are supplied with HEPA grades only, not with G4 or F9. For G4, a CNAS laboratory test report is available for the grade.
How quickly can Prebur deliver HVAC filters? +
Prebur holds Airtech G4 panel filters (595×595×48mm) and F9 pocket filters (595×595×330mm) in local stock at our Silverton, Pretoria warehouse. Standard orders placed before midday are despatched same-day; outlying regions are typically next-day by courier. Compare that to the 6–12 week import lead times most HVAC contractors in South Africa are used to working around. For urgent site requirements, call Nick directly on +27 74 159 1634.
Do you supply filters for both maintenance contracts and new fit-outs? +
Yes. Prebur supplies HVAC contractors on both scheduled maintenance contracts and new commercial fit-outs. Maintenance accounts benefit from regular scheduled deliveries tied to your service intervals, with no chasing stock before every visit. For fit-out projects, we can supply against a full filter schedule and stage deliveries to match installation phases. Trade accounts are available for registered contractors. Contact Nick on +27 74 159 1634 or email [email protected] to set one up.
What is the difference between G4 and F9 filters in an HVAC system? +
G4 panel filters are the first stage: a coarse pre-filter rated at average arrestance ≥90% per EN779:2012. Their job is to protect AHU coils and heat exchangers from large airborne particles: dust, fibres, pollen. F9 pocket filters are the secondary stage, rated at average efficiency ≥95% at 0.4µm, capturing the fine particulate the G4 lets through. A fouled G4 forces the F9 to carry an overload, shortening its service life significantly. Replace both on schedule and you protect the system; neglect the G4 and you pay for premature F9 failures.
Can I collect HVAC filters from Prebur directly? +
Yes. Prebur's warehouse is at 229 Dykor Street, Silverton, Pretoria, accessible from both the N1 and N4 corridors. Call ahead on +27 74 159 1634 to confirm stock availability and collection can usually be arranged same day. Johannesburg contractors: we are approximately 35 minutes from Sandton. Walk-in trade customers are welcome during business hours.

Need a quote for your next project?

Call Nick: +27 74 159 1634 · [email protected]

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