Conservant Systems · HEDS · High Efficiency Dehumidification System
We help leaders stop paying for energy twice.
Every building that controls humidity cools its air to wring moisture out, then pays again to reheat it to control comfort and relative humidity. Our patented HEDS technology recovers some of that wasted energy instead — cutting HVAC energy 50–80%, with results validated by NREL, the Department of Defense and the Department of Energy.
Independently validated & funded by
NREL · DoD ESTCP · U.S. DOE · GSA GPG · CalNEXT · NAVFAC · USACE · California Energy Commission
Recognized by · DOE FEMP national award · Secretary of the Navy Energy Excellence · 3× DoD ESTCP selections · 19 federal awards total
The bottom line
One of the only HVAC technologies that converts owner CapEx into tenant OpEx.
The upgrade pays for itself out of the energy line — so the conversation isn't "what does it cost," it's "who keeps the savings." Here's what that means in your seat.
Lower costs. Higher NOI.
- A projected $1.01+/SF NOI improvement in chilled-water buildings — a 6x–14x return on each incremental HEDS dollar.
- Convert owner CapEx into tenant OpEx — the deferred HVAC replacement, funded over time from the energy line.
- Comfort compounds: higher lease rates, more leased SF, fewer turnovers, lower TI costs.
- Meets building performance mandates now active across 30+ cities by improving HVAC performance.
Win business your competitors can't.
- Bring your owners verified savings they can capitalize — and take that pitch to buildings your competitors manage.
- ±5% humidity control ends the mold calls, stained ceiling tiles and hot/cold complaints that drive churn.
- If your staff can change an air filter, they can maintain a HEDS unit.
Win work with numbers others must bid against.
- Validated 50–80% savings on your proposals, backed by national-lab, DoE and DoW test data.
- First costs can be lower on full upgrades: smaller chillers, pipes and pumps — and no DOAS.
- Design assistance from our team on your early projects, plus remote commissioning on every unit.
Savings you can underwrite.
- A decade of DoD, DOE and NREL measurement de-risks every performance contract.
- Deeper verified savings mean bigger financeable projects and shorter payback on every funded site.
- Fewer moving parts and simple operation means fewer truck rolls across a fleet of buildings.
Proven where failure isn't an option.
- Developed at the request of the U.S. Army Corps of Engineers; serving DoD installations worldwide.
- ESPC and UESC vehicles fund the upgrade from the savings — the Naval Weapons Station Seal Beach template.
- Energy recovery and fault-tolerant controls kept a Puerto Rico FDA lab in spec with 3 of 4 chillers down.
Give your equipment a validated edge.
- Already manufactured on standard production lines at major OEMs — no retooling required.
- License the technology for your air handlers, chiller and heat pump systems.
- Factory-programmed controls and HVAC optimization software integrate without DDC rewrites.
The technology, briefly
What is HEDS?
HEDS — the High Efficiency Dehumidification System — captures some of the waste heat generated during the cooling process and reuses it to drive the reheat cycle, eliminating some or all of the gas or electric heat conventional systems burn after dehumidification. It is slightly larger than the footprint of a standard air handler, has fewer moving parts than any competing approach, and ships with factory-installed optimization software.
Better dehumidification, lower energy costs, healthier air and higher reliability — at a cost comparable to a standard HVAC system. See the full engineering →
- Savings averaged over 50% at validated projects across the USA, Puerto Rico and Guam.
- Comfort improved at every facility where HEDS has been fully integrated.
- Maintenance costs reduced at each facility.
- First costs can be lower than any other third-party-validated energy recovery-based HVAC system.
See your numbers
What would this mean in your building?
Pick your building type, then adjust every assumption to match your reality — the math updates instantly. Disagree with an input? Change it. That's the point.
Your building
+Our assumptions — read before you argue with the output
- Each building type loads its own parameter set from the HEDS financial model: energy intensity, HVAC share of energy, estimated savings percentage, maintenance reduction, incremental installation cost and typical cap rate. Energy cost and cap rate stay editable.
- Savings are held inside the independently validated band (>50% average across every third-party demonstration; several sites above 60%). Vertical-specific upside — batch-risk avoidance, compliance, HAI reduction — is deliberately excluded, so these figures run conservative.
- Net investment is HEDS's incremental cost over a standard AHU replacement, less typical utility incentives (15–20% by vertical, per the model).
- Asset-value math capitalizes the annual savings at your cap rate — the standard NOI treatment. Multifamily figures are per square foot of conditioned common area for high-rise MFH cooled by chillers.
- Every building differs. The real number comes from a real assessment of your loads, plant and climate.
Measured, not modeled
The deepest independent validation record in HVAC.
$15M+ of federal, state and utility-funded testing across 10 years. When NREL switched HEDS off at the Timken Museum for one week, electrical use jumped 87% and fossil-fuel use jumped 129% — then fell back when HEDS was re-enabled.
"Lowest first cost, lowest energy cost, lowest maintenance cost and lowest lifecycle cost — among every alternative evaluated."— SoCalGas evaluation, NWS Seal Beach UESC
Measured HVAC electrical savings — featured projects
Third-party instrumented results vs. each site's baseline
Sources: NREL/TP-5500-94847 · CalNEXT ET22SWE0040 · ESTCP EW-201344 · NAVFAC. Natural-gas savings ran higher still — up to 99–100% reheat elimination. The four case studies →
30% savings is hard to believe. 50% sounds impossible.
We regularly exceed 60% — measured by NREL, the Department of Defense and California's utilities, not by us. It's not a fourth-order polynomial; it's arithmetic, and we'll walk you through it on a live project. Sound too good to be true? That's exactly the conversation we like.