VentPlus for gyms & studios
A person sitting quietly produces roughly 18 to 20 litres of CO2 an hour. The same person at a hard training intensity produces six to eight times that. Put twenty of them in a sealed, air-conditioned studio for a 6 a.m. class and the room's CO2 behaves like a room holding well over a hundred office workers.
Members feel it as heaviness, early fatigue, a session that felt harder than it should have, and stale air that lingers into the next class. Air conditioning does not fix it — a split AC recirculates the same air it just cooled. Only ventilation removes CO2, and VentPlus is what decides when the ventilation runs.
A 20-person studio class · 60 sq m · AC on, doors shut
The CO2 a person exhales scales almost directly with metabolic rate. A desk worker sits at about 1.2 MET; a spin or HIIT class runs at 6–8 MET. So one member training hard produces roughly six to eight times the CO2 of the same person at a desk — which is why gyms go stale far faster than their floor area suggests. Basis: metabolic CO₂ generation rates, ASHRAE 62.1 Appendix C
The VentPlus solution
Most gyms already have an exhaust fan or a fresh-air unit. It is either off, because it makes the room hot, or on all day, because nobody wants to think about it. VentPlus makes it demand-controlled: the fan runs hard while the class is in the room and stops when the room is empty, so you get the air quality without the cooling bill of a fan that never stops.
A gym runs hotter than an office. Fan ON at 1,500–1,800 ppm and OFF at 900 ppm is a good starting point; all four values are set from the front panel and can be changed any time.
Ventilation ramps up with a full 7 a.m. floor and stops during the mid-morning lull — automatically, with no staff involvement.
The unit's backlit LCD reads the live CO₂ level on the wall. Air quality you can point at is a genuine differentiator in a market where every gym claims to be premium.
See exactly when your floor goes stale. The VentPlus dashboard plots CO₂ across the day, so you can line the peaks up against your class timetable and staff the ventilation — or the schedule — accordingly. Multi-branch operators can check every location from one browser. Temperature and relative humidity are graphed on the same time axis, so you can see how hot and humid the floor gets in a packed class, and export all of it to Excel.
VentPlus remote monitoring website — same interface works on mobile, tablet and desktop
Want to try it yourself? Open a live VentPlus dashboard right now — no login, no signup, straight into a real device's data: live readings, plus CO2, fan, temperature and humidity graphs you can download to Excel.
Open a Live Monitoring Dashboard →Tap Open a Live Monitoring Dashboard and give it about 2 seconds to log in and load the live demo.
High CO₂ does not just feel unpleasant. It measurably changes how hard exercise feels and how well people think — and in a subscription business, how a session felt is the whole product.
A meta-analysis pooling 47 experiments and 3,679 participants found better ventilation raised task performance by 13.7% and cut error rates by 16%. The mechanism is the same one that makes a stuffy room feel like hard work.
Kuramochi et al. 2023, Int. J. Environ. Res. Public HealthCognitive scores were up to 101% higher in low-CO2, well-ventilated air than in a conventional sealed space. The largest gains were in strategy and crisis response — the functions that fade first when a room goes stale.
Allen et al. 2016, Environ. Health Perspect.The AC socket on the unit is rated 3A / 700W, enough for the exhaust fans found in almost any studio. Bigger loads run through a contactor. The optional Wi-Fi Relay puts the fan in a different room from the sensor with no new cabling.
VentPlus Main Unit specificationMembers do not know what CO₂ is. They absolutely know when a room is stale.
Common questions
Tell us your room sizes, peak class numbers and what ventilation you already have. We will tell you how many units you need and what thresholds to start with.
or call +91 99170 80700
Downloads
Get the full VentPlus CO2 monitor & controller documentation — everything you need to evaluate, buy and install.