Infrastructure, Networks & Equipment
Atmospheric Water Generator (AWG) Companies
Cooling-coil and desiccant atmospheric water generator OEMs producing potable water from humid air.
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Evaluating Atmospheric Water Generation for Off-Grid and Emergency Supply
Atmospheric water generators (AWGs) extract water vapor from ambient air via vapor compression refrigeration (condensing on chilled coils below dew point), sorbent regeneration (silica gel or MOF adsorption followed by solar/thermal desorption and condensation), or thermoelectric Peltier cooling for small units. Yield is governed by ambient relative humidity, temperature, and air-handling capacity: a 10 kW unit produces 250–500 L/day at 30°C/70% RH but only 50–100 L/day at 25°C/40% RH. Specific energy consumption ranges 0.25–0.6 kWh/L for refrigeration AWGs to 1–3 kWh/L for sorbent AWGs excluding solar input.
Use cases are narrow but high-value: military forward operating bases, disaster relief, remote villages with no surface or groundwater access, luxury residential where 'air-to-water' commands premium pricing, and bottling operations targeting premium hydration markets. Cost economics rarely beat municipal water ($1–3/m³) or trucked-in water ($5–20/m³) — AWG-produced water costs $5–50/m³ depending on humidity and energy source. Integration with PV+battery is typical to reduce grid dependence.
Treatment post-condensation is mandatory: condensate is essentially distilled water lacking minerals, so remineralization with calcite contactors to 60–120 mg/L CaCO₃ hardness is required for taste and pipe-protection. UV disinfection at 40 mJ/cm² controls airborne microbial deposition. Storage and distribution must minimize re-aerosolization risk. Aguato lists AWG providers with proven references in humanitarian, defense, premium-bottling, and off-grid residential segments.
Frequently Asked Questions
What humidity and temperature do I need for an AWG to be viable?
Refrigeration AWGs require >40% RH at >20°C to be technically viable, and >60% RH at >25°C to be economically competitive. Below 30% RH, energy consumption per liter rises sharply (>1 kWh/L) and yields fall to less than 20% of nameplate. Sorbent AWGs extend viable conditions to 15–30% RH but at higher specific energy. Always specify expected ambient profile (psychrometric chart) before sizing — manufacturer 'rated capacity' is at 30°C/80% RH.
How does AWG-produced water cost compare to other supply options?
AWG water typically costs $5–50/m³ at production versus $1–3/m³ for municipal supply, $5–20/m³ for trucked water, $0.5–2/m³ for desalinated seawater, and $0.05–0.30/m³ for reclaimed wastewater. AWG only competes economically when alternatives are unavailable (remote sites), when premium pricing exists (luxury bottled water at $10–100/L retail), or when sovereign water-security goals justify the cost.
Does AWG water need treatment before drinking?
Yes. Condensate is essentially demineralized water and is corrosive to pipes (Langelier Saturation Index strongly negative). Standard post-treatment is a calcite contactor or dosing to 60–120 mg/L hardness as CaCO₃, pH adjustment to 7.5–8.0, UV disinfection at 40 mJ/cm², and 1–5 µm cartridge polishing. Without remineralization, AWG water tastes flat and aggressively leaches metals from distribution.
Can AWGs scale to community water supply (>10,000 L/day)?
Yes, but only economically in high-humidity, energy-rich environments. The largest commercial AWG plants are 30,000 to 500,000 L/day, deployed in Middle East humanitarian contexts and high-end resorts. Below 60% RH or where grid electricity exceeds $0.15/kWh, community-scale AWG is rarely competitive against alternatives. PV+battery integration helps but does not change the fundamental humidity dependence.
A remote village had no reliable surface or groundwater source within 15 km. A donor-funded trucked-water programme was costing $18/m3 and delivering only 8 L/person/day against a WHO minimum of 15 L. Average relative humidity was 68% at 28 degrees C.
Six AWG units rated at 1,200 L/day each at 30 degrees C / 70% RH were installed in an array, solar-PV coupled at 120 kWp with 200 kWh battery storage. Post-treatment included calcite remineralisation to 90 mg/L hardness as CaCO3 and UV at 40 mJ/cm2. Units were containerised for low-maintenance field servicing.
Delivered 14,200 L/day average (19.8 L/person/day), at a levelised cost of $6.40/m3 versus $18 trucked. Trucking was eliminated. Membrane filter replacements accounted for 80% of O&M costs at GBP 4,200/year.
Questions to Ask Shortlisted Providers
- 1
What is the rated output at the actual ambient conditions of my site, not at your standard test conditions?
AWG nameplate capacity is always quoted at 30 degrees C / 80% RH. Real yields at 25 degrees C / 50% RH can be 40 to 60% lower, which changes the entire project economics.
- 2
What specific energy does the unit consume per litre at my expected ambient range?
Specific energy from 0.3 kWh/L (refrigeration, high humidity) to 3 kWh/L (sorbent, arid) drives electricity cost, which is the dominant operating cost for AWG.
- 3
What post-treatment does the unit include for remineralisation and disinfection?
Condensate is essentially distilled water. Without calcite remineralisation and UV, AWG output is corrosive to pipes and does not meet WHO or UK DWI taste and corrosivity standards.
- 4
What is the demonstrated MTBF and MTTR for your units in comparable climate conditions?
AWG reliability in humid tropical conditions (mould, insects, condensate management) differs significantly from temperate deployments. Field reliability data matters more than lab test data.
- 5
What renewable energy integration options are tested and warranted by you versus left to a third party?
Warranty gaps between AWG vendor and PV/battery integrator are a common source of disputes when off-grid systems underperform, leaving the operator with no clear recourse.
What Drives Cost in This Category
AWG economics are highly site-specific. A 30% RH site may require 3 to 4 times more units than a 70% RH site for the same output, multiplying capital and operating costs proportionally.
Solar PV adds GBP 0.08 to 0.15/kWh versus GBP 0.25 to 0.60/kWh diesel, reducing per-litre operating cost by 40 to 70%. Diesel dependence makes AWG rarely viable long-term in remote deployments.
Remineralisation, UV, cartridge filtration, and storage add 15 to 30% to unit capital cost but are non-negotiable for potable compliance. Omitting them creates regulatory and health liability.
Containerised modular arrays (6 to 12 units per container) reduce civil works and improve serviceability, but add 10 to 20% to equipment cost. Custom bespoke installations cost more and take longer to repair.
Key Regulations & Standards
AWG-produced water must meet WHO GDWQ for microbial safety, chemical parameters, and physical acceptability. Condensate without remineralisation typically fails pH and corrosivity guidance.
In UK applications, AWG water supplied to consumers must comply with WS(WQ)R 2016 parameters including turbidity, pH, conductivity, hardness, and microbial standards. DWI notification is required for new supplies.
All materials in contact with AWG-produced water must meet ANSI/NSF 61 (US) or carry WRAS approval (UK) to prevent leaching of metals or organics into the treated water.
ESG-conscious buyers and donors increasingly require third-party LCA of AWG systems to validate water and carbon footprint claims. Solar-coupled units must document electricity source and GHG emissions per litre produced.
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