Commercial HVAC and Ventilation Equipment Supplier, Philippines

What HVAC and ventilation equipment does JOHOB supply?

JOHOB supplies commercial and industrial HVAC and ventilation equipment nationwide: stainless steel wind-driven roof ventilators, evaporative cooling towers, air handling units, and industrial chillers. Every unit is sized to your building thermal load and integrated with existing mechanical and electrical systems. Turnkey supply plus install plus commissioning by one accountable team.

HVAC and ventilation is a natural extension of the mechanical scope JOHOB already delivers. The same facilities that buy our water storage tanks and booster pump systems also need to move air and reject heat: warehouses that trap heat under long-span roofs, laundries and kitchens that generate steam and humidity all shift, and process plants whose chillers live or die by their cooling towers. Our delivered work already includes stainless steel wind-driven roof ventilators supplied to an industrial facility, documented with the same material certificates and commissioning records we attach to every delivery.

The scope covers four equipment families. Wind-driven roof ventilators provide continuous passive extraction with zero running cost. Evaporative cooling towers reject process and chiller heat. Air handling units condition and distribute air through ducted systems. Industrial chillers produce the chilled water those AHUs consume. Each can be bought alone, but they are engineered as a chain, and we quote them that way.

When is a wind-driven roof ventilator the right choice?

Wind-driven roof ventilators work best on warehouses, factories, and covered production floors where you need continuous passive air movement without power. Sized by roof area and required air change rate, they typically pay back within 12 to 24 months versus mechanical extractors. Common sizes: 500mm, 600mm, 750mm heads with SS304 blades and galvanized flanges.

The physics is simple and reliable: rising hot air inside the building and wind passing over the roof both spin the turbine head, which continuously pulls stale hot air out through the roof line. No motor, no wiring, no breaker, no running cost, and nothing to trip during a brownout. For a typical steel-framed warehouse in the Philippine climate, that passive extraction knocks down the under-roof heat load that otherwise builds through the afternoon shift and drives both worker fatigue and cooling cost.

Sizing is a straightforward calculation from roof area, building volume, and the air change rate the operation needs: a parts warehouse tolerates fewer air changes per hour than a production floor with process heat. From there we set the head count and size mix across 500 mm, 600 mm, and 750 mm units. Material matters in this climate: SS304 blade heads resist coastal and industrial corrosion that kills painted mild-steel units in a few wet seasons, and the galvanized base flange ties into the roof sheet with a waterproofing detail we install and stand behind. Facilities inside economic zones, a natural fit for this equipment, can also read our SBMA / PEZA locators page for how we handle zone-gate delivery and documentation.

How to size a cooling tower for a commercial or industrial facility

Cooling tower sizing starts with heat rejection load in kW or tons of refrigeration, then factors ambient wet-bulb temperature (Philippines design point around 28C) and required cold-water outlet temperature. Undersized towers cause chiller efficiency loss; oversized towers waste capital and water. Typical selection: crossflow FRP tower for outdoor rooftop installs, counterflow for industrial process cooling.

The wet-bulb temperature is the number most buyers miss. A cooling tower cannot cool water below the ambient wet-bulb, and Philippine design conditions sit near 28C for most of the year, which is high by global standards. A tower selected from a catalog curve drawn for a 25C wet-bulb climate will underdeliver here every summer afternoon, exactly when the chiller needs it most. We select against Philippine design conditions and state the approach temperature in the quotation so the performance claim is checkable.

Configuration follows the application. Crossflow FRP towers are the default for commercial rooftops: lighter, easier to maintain, and the FRP casing shrugs off UV and rain. Counterflow towers pack more cooling into a smaller footprint and suit industrial process loops. Water chemistry is the other half of tower ownership: scale and biological growth degrade performance and shorten fill life, which is why tower projects pair naturally with water treatment for dosing and control.

Integrating HVAC with our existing pump and control systems

HVAC equipment is only as reliable as the pump, piping, and control system that supports it. JOHOB integrates chilled water pumps sized to system head loss, expansion tanks, air separators, isolation valves, and VFD-driven control panels as part of the HVAC package. Everything sized and commissioned together, warranted end-to-end, single point of accountability.

A chiller plant is a pumping system wearing a different uniform. Chilled water loops need pumps selected on real system head loss, not nameplate guesses, plus expansion tanks and air separators to keep the loop stable. That is the same engineering we already do daily on booster and pressure systems, applied to the air-conditioning side of the plant room. Condenser water loops between chiller and cooling tower get the same treatment.

On the electrical side, AHU fans and chilled water pumps are prime candidates for VFD control, trimming motor speed to actual load instead of running flat out against dampers and balancing valves. Our integrated control panels arrive matched to the mechanical equipment they drive: starters, VFDs, and protection sized to the actual motors on the project, not assembled ad hoc during commissioning week. One team sizes the whole chain, so when the system is handed over there is one warranty conversation, not three.

Typical HVAC install timelines and site conditions

Roof ventilator installs run 1 to 3 days per unit including roof waterproofing tie-in. Cooling tower installs run 2 to 4 weeks including foundation, piping, and electrical. AHU installs are shell-out projects: 3 to 6 weeks depending on ductwork complexity. All timelines assume site readiness confirmed at survey.

Every timeline we commit to starts with a site survey, because site readiness is where HVAC schedules are won or lost. For roof ventilators, the survey confirms roof sheet profile, purlin spacing, and safe access; the install itself is fast, and the waterproofing tie-in is done the same day so the roof is never left open. For cooling towers, the long-lead items are the foundation and the piping tie-in windows, especially when the tower replaces a running unit and the changeover has to happen inside a planned shutdown.

AHU projects carry the most schedule variance because ductwork complexity differs building to building: a straight shell-out with exposed spiral duct moves quickly, while a ceiling-void retrofit around existing services takes patience and coordination. We state the assumptions behind every timeline in the quotation, confirm them at survey, and flag any gap between the two before work starts, the same discipline documented in our Taguig commercial laundry delivery, which went from purchase order to commissioned system in ten weeks.

Frequently Asked Questions

Related Pages

• Pumping and Pressure Systems
• Electrical & Controls
• Water Treatment
• SBMA / PEZA Locators

Reviewed: July 2026