Working Principle of Newly Launched Guard70 Dehumidifier

What the Guard70 Dehumidifier Is

The Guard70 dehumidifier is a 70 L/day refrigerant dehumidifier (70 L/day ≈ 148 PPD, so this is a medium-to-large capacity unit) that removes up to 70 liters of moisture per 24 hours at 26.7 ℃/60% RH. It works based on the refrigeration condensation principle, similar to how an air conditioner extracts humidity.

Working Principle of Guard70

Step 1: Humid Air Intake

A fan pulls warm, humid air from the grow room into the ceiling mounted dehumidifier.
This air usually contains a large amount of water vapor from:

Plant transpiration

Soil or hydroponic evaporation

Misting or irrigation

Step 2: Cooling and Condensation (Evaporator Coil)

The air passes over the cold evaporator coil, which contains low-pressure refrigerant.

The coil temperature is below the air's dew point, so water vapor in the air condenses into liquid droplets on the coil surface.

These droplets collect in a drain pan and are removed via a drain hose or pump.

This is where moisture is actually removed from the air.

Step 3: Reheating (Condenser Coil)

The cooled, now dehumidified air passes over the hot condenser coil (where the refrigerant releases the absorbed heat).

The air warms back up slightly — this prevents overcooling of the grow room and helps maintain a stable temperature.

The result: warm, dry air is blown back into the grow space.

Step 4: Refrigeration Cycle Loop

The refrigerant continuously circulates in a closed cycle:

Evaporator Coil (absorbs heat from air) → Compressor (raises pressure & temperature) → Condenser Coil (releases heat to air) → Expansion Device (drops pressure & temp) → Back to Evaporator Coil

This closed cycle repeats 24/7, continuously pulling moisture from the air.

Why It's Ideal for Grow Rooms

Grow environments naturally produce large humidity loads due to plant activity.
The Guard70 grow tent dehumidifier helps by:

Maintaining target humidity (45 – 60 % RH)

Optimizing VPD (Vapor Pressure Deficit) for nutrient uptake and transpiration control

Preventing mold, powdery mildew, and bud rot

Improving CO₂ enrichment efficiency, since humidity and CO₂ interact with stomatal behavior

Internal Components & Their Functions

Performance Factors in Grow Rooms

Summary

The Guard70 grow room dehumidifier draws humid air, cools it below its dew point to condense water vapor, removes the water, and reheats the dried air before sending it back into the grow room — maintaining stable humidity and plant health.