Refurbished Airflow & Air Quality — 27 Deals

testo 300 Combustion Analyzer HVAC Kit - Residential Combustion Leak Tester for Flue Gas, Draft, Differential Pressure, Ambient CO Levels of Heating Systems - Natural Gas Leak Tester with Spare Probe

Triplett AM320 Thermo-Anemometer with Built-In IR Thermometer, Air Velocity, and Air Flow

16 in 1 Air Quality Monitor Indoor 9 AQI+7 Alerts, CO2 Monitor Air Quality Tester for CO2, TVOC, PM2.5 PM1.0 PM10, HCHO Temperature Humidity AQI & Time Air Quality Meter for Home (Gray)

Hydrofarm Autopilot CO2 Replacement Sensor w/15' Cable (for APC8200)

14-in-1 Air Quality Monitor, Indoor Temperature Sensors, Detect PM2.5/PM1.0/PM10/CO2/CO/TVOC/HCHO/Temperature/Humidity, Air Quality Meter for RV Home Office School Hotel

Testo - 0560 4101 410-1 Digital Pocket Vane Anemometer, 0.4 to 20 m/s Velocity, -10 to +50°C Temperature

CIS 7-in-1 Air Quality Monitor, Indoor Humidity Monitor, Temperature, CO2, TVOC, HCHO, Time, Date Display Desktop Air Quality Tester, Air Quality Meters for Home Office Hotel Restaurant School

testo 550s AC Manifold Gauge Set – Manifold Gauges HVAC – Incl. 2 Wired Temperature Clamp Probes – Recharge Kit with Superheat, Subcooling For AC, Refrigeration & Heat Pumps – Bluetooth

Airthings 2989 View Radon - Radon Monitor with Humidity & Temperature Detector - Battery Powered Mobile APP, WiFi, Alerts & Notifications

TURBRO Digital Manifold Gauge Set with 2 Wired Temperature Clamps and 3 Hoses, HVAC System Pressure and Temperature Measurement, Compatible with 88 Refrigerants, MG800-PRO

Tower Crane Smart Anemometer, ABS Housing Intelligent US Plug 100‑240V Tower Crane Wind Speed Meter for DIY

LifeBasis Air Quality Monitor Indoor, 10-in-1 Air Quality Detector with Stand, Real-Time Air Meter Test AQI, PM1.0, PM2.5, PM10, CO2, TVOC, HCHO, Particles, Temperature and Humidity with Alert -White

LUTIFIX Manometer, Dual-Port HVAC Manometer with 7 Adapters, 10 Units Switch, Data Locking & Storage, Magnetic Back, Gas Pressure Tester, -100~300Kpa, PT530

Klein Tools ET180 Digital Manometer, Air and Gas Pressure Tester, Differential Dual Port Pressure Gauge, Large LCD Display with Backlight

Eve Room - Indoor air Quality Sensor to Monitor air Quality (VOC), Temperature & Humidity, Apple HomeKit Technology, Bluetooth and Thread

Portable O3 Meter Ozone Detector 3.5 Inch TFT Multifunction Air Quality Monitor for Air Quality Temperature Humidity Detection, Handheld Ozone Meter Tester for Home Office Use

Temtop Air Quality Monitor PM2.5 PM10 Particle Counter, Formaldehyde, Temperature, Humidity, TVOC AQI Tester for Indoor/Outdoor Air Pollution Detection w/Data Export

Qingping Air Quality Monitor Gen 2, Air Quality Monitor Indoor Detects PM2.5, CO2, PM10, Noise, Temperature and Humidity, New Upgraded Alarm Clock Function, Air Quality Tester for Bedroom, Smart Home

16 in 1 Air Quality Monitor Indoor 7" Large Display 9 AQI+7 Alerts, CO2 Monitor Air Quality Tester for CO2, TVOC, PM2.5 PM1.0 PM10, HCHO Temperature Humidity AQI & Time Air Quality Meter for Home

Digital Manometer, Dual Port Air Pressure Meter Pressure Gauge HVAC Gas Tester, Differential Pressure Manometer with 5/16 Inches Diameter Pressure Port, Hti-Xintai

Mold Test Kit for Home,14 Simple Detection Tests,Test HVAC System,Home Surfaces, Indoor Air Quality Testing,DIY Mold Detector,Includes Detailed Mold Identification Guide,Black Mold Testing kit

MOLD ARMOR Do It Yourself Mold Test Kit

11-in-1 Air Quality Monitor, Indoor CO2/VOC/AQI/PM2.5/Thermometer/Humidity Monitor, Portable Smart Air Quality Meters, Air Quality Tester for Home Office Outdoor, Battery Powered

Temtop Smart Air Quality Monitor with Indoor Thermometer & Thermo-Hygrometer – PM2.5, AQI, Temperature and Humidity Detector for Home, Office, Nursery, School, App Connectivity, 60-Day Battery Life