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THE SIAMPHAT JOURNAL

Better air. Better living.

Ideas on air, buildings and energy.
Through an engineering lens.

EXPLOREAir qualitySmart SystemsEnergy & sustainabilityEngineering services
Latest articles01 — 04
Thermal Stratification in High-Ceiling Buildings Warm upper layers can be a problem or an intentional design feature. Decide whether to preserve or reduce stratification by evaluating occupied-zone comfort, ventilation and the system energy balance.Designing Microclimates for Large Buildings A people-centred engineering approach to radiant heat, air movement, humidity and air quality across large and semi-open spaces.What is IAQ? Why indoor air quality matters A good building should offer more than a comfortable temperature. The air people breathe matters to their health and daily experience as much as the features they can see.Indoor CO₂ Build-up: Cool Air Can Still Be Under-Ventilated An occupied, closed room can accumulate carbon dioxide even when it feels cool and particle levels are low. Good indoor air design must account for people, pollutant sources and the outdoor air actually delivered.
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Products

HVAC & air-handling unitsHVAC & air-handling units Condition, filter and distribute air, with outdoor-air and recirculation arrangements matched to use. Humidity management depends on coil selection and controls.Filtered outdoor air & positive pressureFiltered outdoor air & positive pressure Supply outdoor air for occupants and direct air out through planned relief paths. Sealing and exhaust systems must be considered together; a larger fan alone is not a complete solution.Filtration & air treatmentFiltration & air treatment Reduce particles in supply or recirculated air according to filter performance and actual airflow. Source control and ventilation remain part of the solution.Energy-recovery ventilationEnergy-recovery ventilation Precondition incoming outdoor air using the difference between the two airstreams. Recovery may reduce part of the conditioning load, but does not replace cooling or dehumidification in every condition.Industrial air conditioningIndustrial air conditioning Address heat in factories, large halls or work zones by matching capacity and distribution to people, processes, machinery and building constraints.Outdoor & semi-open spot coolingOutdoor & semi-open spot cooling Address conditions where people work or wait using appropriate discharge position and direction. Open spaces cannot be assessed as sealed rooms or promised uniform temperature reduction.Fans, ducts & air distributionFans, ducts & air distribution Supply, exhaust or circulate air according to the application. The operating point is set by the intersection of the fan and system curves, so resistance and equipment must be assessed together.Air-quality sensing & controlsAir-quality sensing & controls Match operation to changing occupancy and loads and help identify faults. Occupant-generated CO₂ can inform ventilation assessment, but is not a measure of every pollutant.
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Better air begins with the whole system A capable air cleaner, a powerful fan or comfortable cooling may still leave a problem unresolved. Good air depends on how occupants, sources, airflow and equipment interact.Fresh air, filtration & ventilation: one design Design the components to work together, from outdoor air to the environment inside.From measurement to purposeful control IoT, smart sensors and AI are tools within the system architecture. We consider them where they improve understanding of real conditions and support appropriate operation.Air, electricity & energy: connected from the start Good air systems need the right foundations. We bring air, electrical systems and energy into the same engineering conversation.Thermal Stratification in High-Ceiling Buildings Warm upper layers can be a problem or an intentional design feature. Decide whether to preserve or reduce stratification by evaluating occupied-zone comfort, ventilation and the system energy balance.Designing Microclimates for Large Buildings A people-centred engineering approach to radiant heat, air movement, humidity and air quality across large and semi-open spaces.What is IAQ? Why indoor air quality matters A good building should offer more than a comfortable temperature. The air people breathe matters to their health and daily experience as much as the features they can see.Indoor CO₂ Build-up: Cool Air Can Still Be Under-Ventilated An occupied, closed room can accumulate carbon dioxide even when it feels cool and particle levels are low. Good indoor air design must account for people, pollutant sources and the outdoor air actually delivered.Centrifugal vs Axial Fans: Choose the Actual Operating Point A high free-air rating does not guarantee adequate airflow through a filter into a sealed room. Fan curves, system resistance and air balance explain which fan fits a dust-protection positive-pressure room.BLDC Motors: matching the motor to the job A practical guide to brushless motors, torque, electronic drives and efficient building air management.Keep your home cool with less energy Solar-powered DC attic ventilation: a design concept for buildings that accumulate less heat, support comfort and use energy thoughtfully.From your brief to a working system We work on engineering for buildings and residences, covering design, procurement, installation and system care, with a focus on quality, safety and fitness for purpose.Appropriate energy starts with understanding the building Consider Solar PV and BESS in relation to electricity demand, available space and project goals.

INDOOR AIR QUALITY

A complete view
of indoor air.

Design the components to work together, from outdoor air to the environment inside.

IAQ+ENERGY
01

Fresh air & filtration

Consider the outdoor air source and select a filtration approach suited to local pollutants and site constraints.

02

Ventilation & pressure

Plan air movement and balance, including positive-pressure approaches where appropriate for the space.

03

Indoor conditions & energy

Consider the interaction with air conditioning, humidity, energy demand and operating schedules.

CONNECTED DISCIPLINES

Connected engineering.
Better-working buildings.

Good air systems need the right foundations. We bring air, electrical systems and energy into the same engineering conversation.

01 / CORE PRACTICE

Indoor Air Quality

Integrated indoor air management

Fresh air, filtration, ventilation and controls, considered alongside monitoring and energy.

Discuss a project

02 / ELECTRICAL

Electrical Systems

Electrical engineering & services

Design and installation for buildings, with attention to safety, operating loads and maintenance.

Discuss a project

03 / ENERGY

Solar & Energy

Solar power & energy storage

Consider Solar PV and BESS in relation to electricity demand, available space and project goals.

Discuss a project

OUR APPROACH

From understanding a space
to a working system.

  1. 01

    Listen & assess

    Understand the problem, objectives, patterns of use and existing systems.

  2. 02

    Design & select

    Evaluate engineering options, energy implications and ongoing maintenance.

  3. 03

    Implement & check

    Procure, install and check operation within the agreed project scope.

  4. 04

    Maintain & improve

    Use operating information and maintenance to support continuing improvement.

ABOUT SIAMPHAT

Siamphat
Engineering & Services

We work on engineering for buildings and residences, covering design, procurement, installation and system care, with a focus on quality, safety and fitness for purpose.

Homes · Commercial buildings · Learning spaces · Factories · Organisational projects

Building experience.
An integrated perspective.

From electrical systems and solar energy to dust-conscious home education and positive-pressure air systems, we consider how each discipline connects to the building and the people who use it.

START A CONVERSATION

Let’s start
with your space.

Tell us about your space, the challenges you face and what you would like to improve. We can then discuss a suitable direction.

Useful information for our first conversation

  • Type and approximate size of the space
  • Current challenges or desired outcomes
  • Existing systems and operating hours
Call us081 473 8995+66 81 473 8995Connect on LINElengwj
Mae Wang, Chiang Mai

340, Donpao, Mae Wang
Chiang Mai 50360, Thailand