Commercial HVAC in Hayward, for us, means small commercial properties: retail spaces, offices, restaurants, light-industrial units and mixed-use buildings with businesses on the ground floor and homes above. Our shop at 25005 Viking St sits in west Hayward’s industrial area, next door to buildings much like the ones we work on. The equipment differs from a house, with rooftop units, packaged systems and multi-zone setups, but the approach does not: find the cause, explain it, and price it before any work begins.
Equipment we service
- Rooftop and packaged units. Heating and cooling in one cabinet on the roof or on a pad, common on shops and light-industrial buildings. Blower belts, economizers, drain pans and roof curbs all need regular attention.
- Split systems. An indoor furnace or air handler with an outdoor condenser, typical in offices and smaller suites.
- Multi-zone configurations. Zoned ductwork with motorized dampers, or several systems serving separate areas of one building.
- Ductless units for rooms the main system never reached well; see ductless mini-splits.
We work on all major brands, including Carrier, Trane, Lennox, Daikin, Rheem, York and Mitsubishi Electric.
Common problems in small commercial buildings
| What you notice | Usual cause | What it usually takes |
|---|---|---|
| Uneven temperatures across zones | Stuck damper, zone control fault, unbalanced airflow, a space used differently than designed | Damper and control checks, air balancing |
| High utility bills | Dirty coils and filters, slipping blower belt, economizer stuck open, aging equipment | Cleaning, adjustment, repair or a replacement plan |
| Customer or employee complaints | Hot sales floor, cold back office, stuffy meeting rooms | Measuring airflow and load room by room |
| Water dripping from the ceiling or around a rooftop unit | Clogged condensate drain or overflowing pan | Drain clearing and pan check |
| Space never cools on hot afternoons | Undersized for current use, refrigerant leak, failing compressor | Diagnosis before any parts are ordered |
An economizer brings in outside air when it is cool enough to cool the building for free. When its damper sticks open on a hot day, the unit is fighting outdoor heat all afternoon, and the bill shows it.
Sizing for how the space is used now
Most commercial comfort problems come from one of three causes: equipment sized for a different use of the space, aging equipment, or maintenance that slipped. Use changes more often than people expect. A light-industrial unit turns into offices, a shop adds lighting and refrigerated cases, a restaurant adds a second oven line, or new partitions cut a room off from its supply and return. Each one changes the heat load and the air paths. Before anyone recommends bigger equipment, we check whether rebalancing, zoning or duct changes solve it.
Restaurant kitchens add a lot of heat and send grease-laden air toward filters and coils, so they need shorter cleaning intervals than an office of the same size.
Mixed-use buildings
A mixed-use building puts two schedules under one roof: a business that needs cooling during the day and apartments that need heat at night. Often each unit has its own system and thermostat; sometimes equipment is shared. We record which system serves which space, so the owner, the tenants and the next technician are not guessing. Rooftop work above occupied homes is planned around the residents as well as the business. Ventilation and filtration questions, common when a shop and apartments share air paths, are covered on our indoor air quality page.
Scheduling around your business
Commercial HVAC problems affect sales and staff, so assessments and planned work are scheduled during off-hours when possible. Our hours run Monday to Friday 7 AM to 8 PM, Saturday 8 AM to 6 PM and Sunday 9 AM to 5 PM, which leaves room for visits before opening or after closing. For breakdowns, the emergency line is open 24/7, and same-day service is available for urgent repairs.
Maintenance for commercial systems
- Filters quarterly at minimum, more often in restaurants and dusty light-industrial spaces.
- Coils, belts and drains checked each season. A slipping belt or a clogged drain pan on a rooftop unit is a common reason for a comfort call.
- A service agreement keeps maintenance on a fixed schedule and gives you priority response when something fails.
- A record of every visit: date, findings, readings and parts. It keeps warranty claims simple and gives you the documentation that compliance requirements, landlords or a buyer may ask for.
Our technicians are licensed and insured, and repairs carry a warranty. The general tune-up checklist is on our HVAC maintenance page.