Thailand sets out energy performance standards for buildings 
Thailand announced “Notification of the Ministry of Energy on Determination of Building Design Standards for Energy Conservation B.E. 2564 (2021)” and “Notification of the Ministry of Energy on Criteria and Procedures for Calculating and Certifying Assessment Results of Energy Conservation Building Design of Buildings of Each System, Overall Energy Consumption of the Building, and Renewable Energy Consumption of Building Systems B.E. 2564 (2021)” in the Royal Gazette on 24 December 2021. These notifications, that repeal a set of old notifications established in 2009, prescribe energy performance standards for different types of buildings as well as related technical standards. The notifications have been effective from the date of publication in the Royal Gazette.
Scope:
The notification specifies standards for four following fields;
1. Thermal Transfer of Building Envelope System
Overall Thermal Transfer Value (OTTV) into a building with air-conditioning of each building type must not be greater than the following value:
| Building Type | Overall Thermal Transfer Value (Watt per Square Meter) |
| (1) Theater
(2) Hotel (3) Entertainment Spot (4) Hospital (5) Academy (6) Office (7) Department Store or Shopping Center (8) Condominium (9) Assembly Building |
40
30 40 30 50 50 40 30 40 |
Roof Thermal transfer value (RTTV) into buildings with air-conditioning of each building type must not be greater than the following value:
| Building Type | Roof Thermal Transfer Value (Watt per Square Meter) |
| (1) Theater
(2) Hotel (3) Entertainment Spot (4) Hospital (5) Academy (6) Office (7) Department Store or Shopping Center (8) Condominium (9) Assembly Building |
8
6 8 6 10 10 8 6 8 |
2. Lighting Power Density
The lighting power density (LPD) of each building type must not be greater than the following value:
| Building Type | Lighting Power Density (Watt per Square Meter) |
| (1) Theater
(2) Hotel (3) Entertainment Spot (4) Hospital (5) Academy (6) Office (7) Department Store or Shopping Center (8) Condominium (9) Assembly Building |
11
12 11 12 10 10 11 12 11 |
3. Energy Efficiency Ratio of Air Conditioning System
For air-conditioners with a capacity of less than 12,000 watts, the Seasonal Energy Efficiency Ratio must be under the current Label No. 5 Certification Criteria (minimally) of the Electricity Generating Authority of Thailand. The water cooler of a vapor-compression air-conditioning system must have an electric power per Ton of Refrigeration not greater than the value specified in the notification.
4. Minimum Efficiency and Minimum Coefficient of Performance of Water Heater
Water heaters installed in buildings must have the minimum efficiency and minimum coefficient of performance specified in the notification.
Download original text of the Notification at
- Notification of the Ministry of Energy on Determination of Building Design Standards for Energy Conservation B.E. 2564 (2021)
http://www.ratchakitcha.soc.go.th/DATA/PDF/2564/E/315/T_0002.PDF - Notification of the Ministry of Energy on Criteria and Procedures for Calculating and Certifying Assessment Results of Energy Conservation Building Design of Buildings of Each System, Overall Energy Consumption of the Building, and Renewable Energy Consumption of Building Systems B.E. 2564 (2021)
http://www.ratchakitcha.soc.go.th/DATA/PDF/2564/E/315/T_0009.PDF
The two notifications are the ones to implement Ministerial Regulation Prescribing Type or Size of Building and Standard, Criteria and Procedure in Designing Building for Energy Conservation B.E. 2563 (2020) published on 12 November 2020.
