Today I will be reviewing Testo 435-2 HVAC Ventilation Analyzer. This meter is designed to be used for measuring room climates, inspecting and maintaining vent and air conditioning installations, and assessing the quality of room air. There are many options to choose from for the base model of Testo 435. This particular analyzer is a customizable handheld meter that can store up to 10,000 measurements and comes with PC software for report creation and analysis.