Night - time CO2 in the bedrooms was above 2000 ppm, indicating inadequate ventilation. (passivehouseplus.ie)
Heatstroke generally occurs in hot summer weather when dogs are left with inadequate ventilation in hot vehicles. (urbananimalveterinary.com)
Heatstroke can occur when dogs and cats are left in hot vehicles with inadequate ventilation, left outdoors without access to shade or exercised in hot weather. (blooranimalhospital.ca)