Philippine Hospitals Spend ₱1M+/Year on Hot Water.
iHEAT Cuts That by 75%.
24/7 redundant hot water for CSSD sterilisation at 80°C, Legionella pasteurisation at 70°C, and domestic hot water at 60°C — all from a single natural refrigerant heat pump system with zero Scope 1 emissions.
Why Philippine Hospitals Are Switching
Hospitals have unique hot water demands: 24/7 operation, strict temperature requirements, and zero tolerance for downtime. Heat pumps address all four critical challenges.
24/7 Redundancy Requirement
Hospitals cannot tolerate hot water outages. Boiler failures during overnight shifts halt CSSD operations and compromise patient care. iHEAT N+1 parallel architecture with iSTOR thermal buffer ensures continuous supply — no single point of failure.
CSSD 80°C Requirement
Central Sterile Supply Departments require hot water at 80°C for washer-disinfectors and instrument reprocessing. iHEAT CO₂ delivers 80-90°C at COP 4.0 — meeting HTM 01-01 sterilisation standards without steam boiler infrastructure.
Legionella Pasteurisation
Hospital water systems must maintain 60°C storage and execute periodic 70°C pasteurisation to prevent Legionella. iHEAT maintains these temperatures automatically with programmable pasteurisation cycles, meeting HTM 04-01 and ASHRAE Guideline 12.
Hospital ESG & Green Building
DOH green hospital programmes, BERDE certification, and SEC PFRS S2 require measurable emission reductions. Switching to iHEAT eliminates Scope 1 combustion emissions and avoids HFC refrigerant disclosures — verifiable through the iSAVE platform.
Recommended Products for Hospitals
A complete hospital hot water solution: redundant supply, thermal storage, Legionella control, and smart monitoring.
iHEAT R290 Parallel
N+1 parallel modules. 6-350kW per unit. COP 4.0-5.0. Domestic hot water at 60°C with automatic failover between units.
iHEAT CO₂
CSSD-grade hot water at 80-90°C. COP 4.0. Dedicated high-temperature circuit for sterilisation and washer-disinfectors.
iSTOR
Phase-change thermal buffer. 33-80kWh. Maintains Legionella pasteurisation temperatures. Hours of backup during power events.
iSAVE
Smart monitoring. Real-time temperature logging, Legionella compliance alerts, energy reporting, and BMS integration via BACnet/ModBus.
150-300 Bed Hospital, Metro Manila
A typical 150-300 bed Philippine hospital consumes 800-1,500 litres of hot water per hour across CSSD, laundry, kitchen, and patient bathrooms. At current diesel prices, annual hot water costs exceed ₱1 million. Replacing the diesel boiler system with iHEAT R290 (domestic) and iHEAT CO₂ (CSSD) reduces this by 75%, with N+1 redundancy that exceeds the reliability of a single boiler installation.
Engineering Tools for Hospital Projects
Free calculators to size your hospital heat pump system.
Behind your meter. Sized to your load. Not to the Meralco cap.
Most Filipino businesses have been sold solar that covers only 20% of consumption. That is not a regulatory cap — it is what solar gives you without storage. The DOE's April 2026 circular lifted net metering to 1 MW for commercial sites; and if your solar only feeds your own site, never exporting to the grid (Meralco calls this Zero Export), there is no cap at all. The missing piece is storage that actually matches your load — which on most industrial and commercial sites is mostly thermal, not electrical.
1 · Karnot iVOLT solar & LiFePO₄
Solar inverters and LiFePO₄ batteries sized to the roof you actually have. LiFePO₄ chemistry chosen for tropical safety — no thermal runaway, 6,000+ cycle life. Configured for Zero Export so the only cap is your own daytime demand.
2 · Karnot iHEAT & iCOOL
R290 heat pumps for hot water, process heat, and reversible air conditioning; CO₂ for refrigeration. The heat pump is the largest customer of the iVOLT battery — absorbing solar before it gets exported and banking it as heating or cooling capacity instead.
3 · Thermal batteries that aren't lithium
iSTOR phase-change batteries for hot water and process heat, Permafrost for chilled water and cold-chain. 5–10× cheaper per kWh than lithium for thermal loads — with the Karnot FLX coconut-based PCM in development, sourced from the next province over.
We do not sell solar. We do not sell heat pumps. We do not sell batteries. We sell the integrated Philippine solution that lets all three actually work together — behind your meter, sized to your real load, with thermal storage that matches what your site actually consumes.
Frequently Asked Questions
How much can a Philippine hospital save with heat pumps?
A typical 150-300 bed hospital saves over ₱1 million per year by replacing diesel boilers with iHEAT. Larger hospitals with extensive CSSD, laundry, and kitchen operations save considerably more. The exact savings depend on bed count, occupancy, and current fuel costs.
Can iHEAT deliver 80°C for CSSD sterilisation?
Yes. iHEAT CO₂ delivers hot water at 80-90°C with COP 4.0, meeting the temperature requirements for CSSD washer-disinfectors and instrument reprocessing. The system maintains precise ±1°C temperature control for consistent sterilisation performance.
How does the system prevent Legionella?
iHEAT maintains stored water at 60°C minimum and executes automatic pasteurisation cycles to 70°C as required by HTM 04-01 and ASHRAE Guideline 12. iSTOR phase-change thermal batteries hold pasteurisation temperatures without additional energy input, and iSAVE provides real-time compliance logging.
What redundancy is built into hospital installations?
All hospital installations use N+1 parallel heat pump modules with automatic failover. If any single unit requires service, remaining units maintain full supply. iSTOR thermal batteries provide hours of hot water buffer during power events or peak demand.
Does this support hospital ESG and green building targets?
Yes. Eliminating diesel combustion removes Scope 1 emissions. R290 (GWP 3) and CO₂ (GWP 1) refrigerants avoid HFC disclosures. This supports DOH green hospital initiatives, BERDE certification, and SEC PFRS S2 climate disclosure for listed healthcare groups.
Why am I being told my solar can only cover 20% of my electricity bill?
That 20% figure is not a regulatory cap — it is the daytime self-consumption ceiling that solar gives you without storage. Two routes raise it: (1) the DOE's April 2026 circular lifted the net metering cap to 1 MW for commercial sites, and (2) if your solar only feeds your own site, never exporting to the grid (Meralco calls this Zero Export), there is no capacity cap at all. The binding constraint is your ability to absorb daytime generation — which is exactly what Karnot heat pumps plus thermal storage solve, by banking solar as heating, cooling, and hot water for night-time dispatch.
How does Karnot help with Meralco demand charges?
Meralco commercial bills include a demand charge based on the highest 15-minute kVA peak in the billing period. Heat pumps charging a Permafrost or iSTOR thermal battery overnight or during off-peak hours dispatch hot water and chilled water during the daytime peak, so the heat-pump compressor can be sized smaller and run at lower nameplate during the peak window. This shaves the 15-minute peak — often the single largest controllable line on a Philippine commercial electricity bill.
How is Karnot different from MSpectrum, Solaric, or other Philippine solar installers?
They sell solar panels. Karnot sells the integrated solution that lets solar actually work for a commercial site: solar plus heat pump plus thermal battery, sized to your real load profile and configured behind the meter. We do not install net-metering systems capped at 20% offset. We engineer Zero Export installations sized to whatever your roof and load can carry. The result is typically 60–80% bill reduction instead of the 4–20% that solar-only installs deliver on a 24/7 commercial load.
What is the payback period for a Karnot installation?
Sub-12-month paybacks are realistic on integrated retrofits combining solar (Karnot iVOLT), heat pumps (iHEAT R290 or iCOOL CO₂), and thermal storage (iSTOR or Permafrost) at sites paying full commercial Meralco tariff. Standalone retrofits pay back more conservatively — iMESH adiabatic chiller upgrade typically under 12 months, DHW-only retrofit replacing LPG or diesel in 18–24 months. Most installations qualify for BOI Pioneer status and Income Tax Holiday under RA 11285, which shortens payback further. Karnot files the BOI registration paperwork as part of project scope.
24/7 Hot Water. 75% Less Cost. Zero Emissions.
Book a free hospital site survey. We will model your hot water demand across CSSD, laundry, kitchen, and patient areas.