Practical insights on energy, building automation, and compliance for buildings and industry, by the Cobler team.
HVAC & Chiller PlantsA spec sheet says 3.5 kW cooling from 1 kW of power. That is not broken physics. An aircon moves heat instead of making it, and the ratio that measures the leverage is COP.
HVAC & Chiller PlantsTwo near-identical aircon units, one says INVERTER and costs more, and nobody can say why. Here is what is actually different inside, what it saves, and the payback you can do yourself.
HVAC & Chiller PlantsOn 2 April 2026, Malaysia ordered all government offices to set air-conditioning no lower than 24C. The facts, the RM maths under RP4, and why the rule failed in 2011 and 2023: verification.
HVAC & Chiller PlantsChiller plants get the attention, but the air side - fans, ducts, AHUs, FCUs - runs its own energy bill and decides comfort. Where air-side energy goes, and how to cut it.
HVAC & Chiller PlantsDelta-T is the hidden lever on chiller plant efficiency. Here is why it decides kW/RT, what causes low delta-T, and how to tune a plant for the best efficiency.
HVAC & Chiller PlantsBuilding cooling is a relay between the water side (chillers, pumps) and the air side (AHUs, coils), meeting at the cooling coil. Here's how they connect - and fail.
HVAC & Chiller PlantskW/RT is the one number that tells you how efficient a chiller plant is. Here is what good looks like in Malaysia, what drives plants off it, and how to fix it.
HVAC & Chiller PlantsAir-conditioning often runs to half a building's energy in the tropics. The biggest HVAC optimization levers for Malaysian operators, with worked numbers and TNB RP4 impact.