Make-Up Air Retrofit in Vancouver Market Rental Building
A low-efficiency, gas-heated make-up air (MUA} system in a market rental building in Vancouver was upgraded to a hybrid dual-fuel heat pump MUA system. A MUA system supplies fresh, tempered outdoor air to maintain hallway pressurization for indoor air quality and to mitigate smoke and odour migration between suites. In the upgraded system, the heat pump serves as the primary heating source, with gas auxiliary heat used only during cold conditions, reducing the system size and cost. Smart controls enable automatic switching between electricity and gas based on outdoor temperature.