<abstract xmlns="http://www.w3.org/1999/xhtml">Indoor environmental conditions in intensive pig farms are influenced by both the outdoor air temperature and humidity, and the heat, moisture and gas exchanges between the animal and the air. As ventilation rate in pig facilities is usually estimated in temperature, moisture and even CO2 balances, estimation of heat losses or gains, and moisture and CO2 production from the animal is needed, but the contribution of other sources of the barn, such as slurry or wet surfaces have also to be taken into account. Some recent studies have been conducted to update total heat and moisture production at farm level, showing that current, historical standards of latent heat transfer are consistently lower than those reported recently at facility level, for both adult and growing animals. Also, CO2 production needs to be updated by including an estimation of its release from slurry. These new values will help with updating the standards for ventilation rate recommendations and design of the modern intensive pig buildings.</abstract>

Indoor environmental conditions in intensive pig farms are influenced by both the outdoor air temperature and humidity, and the heat, moisture and gas exchanges between the animal and the air. As ventilation rate in pig facilities is usually estimated in temperature, moisture and even CO2 balances, estimation of heat losses or gains, and moisture and CO2 production from the animal is needed, but the contribution of other sources of the barn, such as slurry or wet surfaces have also to be taken into account. Some recent studies have been conducted to update total heat and moisture production at farm level, showing that current, historical standards of latent heat transfer are consistently lower than those reported recently at facility level, for both adult and growing animals. Also, CO2 production needs to be updated by including an estimation of its release from slurry. These new values will help with updating the standards for ventilation rate recommendations and design of the modern intensive pig buildings.

How Pigs Influence Indoor Air Properties in Intensive Farming: Practical Implications – A Review

Department of Animal Production and Food Science

Annals of Animal Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Indoor environmental conditions in intensive pig farms are influenced by both the outdoor air temperature and humidity, and the heat, moisture and gas...

How Pigs Influence Indoor Air Properties in Intensive Farming: Practical Implications – A Review

Published Online: Feb 01, 2019

Page range: 31 - 47

Received: Feb 09, 2018

Accepted: Jun 06, 2018

DOI: https://doi.org/10.2478/aoas-2018-0030

Keywords
pigs, heat production, moisture production, carbon dioxide, ventilation rate

© 2019 Fernando Forcada et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

How Pigs Influence Indoor Air Properties in Intensive Farming: Practical Implications – A Review

Published Online: Feb 01, 2019

Page range: 31 - 47

Received: Feb 09, 2018

Accepted: Jun 06, 2018

DOI: https://doi.org/10.2478/aoas-2018-0030

Keywordspigs, heat production, moisture production, carbon dioxide, ventilation rate

© 2019 Fernando Forcada et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
pigs, heat production, moisture production, carbon dioxide, ventilation rate