# Hotels & Hospitality

> The Hotels & Hospitality playbook is jouleWise's typical engineering approach for hotels and hospitality portfolios: your chillers throw away your hot water.

Canonical: https://joulewise.com/industries/hotels-hospitality  
Publisher: jouleWise Advisory Services Pvt Ltd, Noida, India · Spain  
Reviewed: 2026-10-08  
Status: company page

## In short

One provider for green electricity, green heat and the data that proves both — from the chiller plant to guest-room showers to the laundry. For a hotel or hospitality group, energy and carbon now show up in corporate RFPs, certifications and owner reporting. Six pressures point at the same metered data. Almost all hotel heat is low-temperature: showers, dishwashing, laundry and the pool sit between 26 and 82 °C. Heat pumps are built for this — and the chillers already on site supply the heat.
## Your chillers throw away your hot water.

- **The situation.** A hotel runs a small utility plant 365 days a year: chillers for comfort, hot water for rooms, kitchens and laundry, pool heating, and DG sets for outages. Hot water and laundry usually burn LPG, PNG or diesel, while the chillers next to them reject heat through cooling towers. Corporate travel buyers, owners and lenders increasingly ask for carbon per room night.
- **The gap.** Electricity, heat and ESG reporting are bought from different vendors on different clocks. Solar is sized without the heat load; boilers are replaced without a plan for low-cost electricity; ESG data is typed in once a year. Each fix leaves money and carbon on the table.
- **What we do.** jouleWise runs the whole decarbonisation stack: <b>green electricity</b> — intrastate and ISTS solar and wind, rooftop solar, BESS and green-market purchase, each source orchestrated to fulfil the property's demand at least cost; <b>ABT metering and data loggers</b> on every source and load; <b>green heat</b> from industrial heat pumps up to 120 °C; <b>ergOS</b> to meter and orchestrate both every 15 minutes; <b>esgOS</b> to turn the same data into audit-ready disclosure.
- **Why it compounds.** Low-cost green electricity lowers the cost of every unit of heat a heat pump makes. Thermal storage lets that heat be made in the cheapest solar blocks. ergOS proves it; esgOS reports it. Savings from one layer fund the next.
- **The value.** Up to 25% lower electricity cost on DISCOM tariff and up to 65% renewable share (reported, year 1 of ergOS). Heat-recovery heat pumps then make guest hot water from chiller heat — cooling and hot water from one kWh — and batteries cut DG hours.
- **How to engage.** Four models, mix and match: <b>Advisory</b>, <b>SaaS</b> (ergOS + esgOS), <b>Heat Advisory</b>, and <b>Heat as a Service</b>, where you pay per unit of heat and invest nothing upfront.
- **First step.** A four-week decarbonisation baseline on one property: electricity bills, DG and fuel logs, and portable heat metering on hot water, laundry and the pool — ending in one business case for the property and a template for the portfolio.

## Why now: Your guests' employers count the room night.

For a hotel or hospitality group, energy and carbon now show up in corporate RFPs, certifications and owner reporting. Six pressures point at the same metered data.

- **Corporate travel buyers.** Corporate travel programmes increasingly ask for carbon and energy per occupied room night before they sign rate agreements.
- **Certifications and platforms.** Green building ratings and sustainability badges on booking platforms all rest on metered energy and water data.
- **Energy cost.** Hotels usually pay commercial tariffs, among the highest per unit — and run chillers, hot water and laundry every day of the year.
- **LPG, diesel and DG.** Hot water, laundry and pools run on LPG, PNG or diesel, and DG sets cover outages. Heat pumps and batteries replace most of that fuel.
- **Owners and lenders.** Owners, investors and lenders want asset-level energy and carbon data; green finance prices it in. Listed groups also report BRSR Core-format data.
- **Guest expectation.** Guests notice towel cards; they notice a hotel that runs on green electricity more. The claim needs a meter behind it.

## The intervention map: Every room night has a lever.

Guests arrive, rooms need hot water, kitchens cook, laundry runs, the pool stays warm and chillers keep it all cool. jouleWise acts at eleven points across the property — and repeats the plan across the portfolio.

1. **Green sourcing** (power, Electricity). Intrastate and ISTS solar and wind through green open access — eligible from 100 kW under the 2022 rules, subject to state regulations.
2. **Connectivity and metering** (power, Electricity). Open access approvals, connection agreement and ABT metering at the property incomer.
3. **Rooftop solar** (power, Electricity). Podium and service roofs carry behind-the-meter solar, sized from measured load.
4. **Battery storage** (power, Electricity). LFP storage replaces most DG hours and shaves the evening peak.
5. **Heat pumps for guest hot water** (heat, Heat). Rooms, kitchens and spa hot water from heat pumps and a legionella-safe store.
6. **Laundry** (heat, Heat). Washers and heat-pump dryers on the hot-water circuit; ironers stay on steam or gas.
7. **Pool and spa** (heat, Heat). Pool held at temperature by heat pumps instead of LPG or diesel heaters.
8. **Chiller heat recovery** (heat, Heat). Chiller condenser heat becomes guest hot water — cooling and hot water from one kWh.
9. **ergOS control** (data, Data · ergOS). 15-minute metering of electricity, hot water, chilled water, fuel and water; forecasting and dispatch.
10. **Guests, buyers and owners** (esg, ESG · esgOS). Carbon per room night for corporate RFPs, certifications and owner reporting from esgOS.
11. **EV charging** (power, Electricity). Guest and fleet EV chargers on green electricity, metered and billed on ergOS.

Illustrative plant. Actual intervention map built site by site in the baseline.

## Green electricity: Low-cost green electricity.

Hotels carry a steady load with an evening peak — chillers, lifts, kitchens and lighting. Green open access is available from 100 kW under the Green Energy Open Access Rules, 2022, subject to state regulations, and properties in one state can be planned together. Batteries take over DG hours.

- **Plan.** Meter-data due diligence: bills, load survey, rooftop and captive parameters. Solar, wind, hybrid, BESS and exchange electricity optimised together, capex or opex, with each state's ToD, banking and open access charges in the landed-cost model. Outcome: RE-100 roadmap · size, location, savings, NPV
- **Implement.** RfP over a 25-year horizon, developer evaluation, reverse auction, PPA and shareholder agreements (26% SPV equity for captive status), open access approvals and connection agreement. Outcome: Green electricity contracted · ~3 months once planning closes
- **Meter and log.** ABT meters at injection and drawal points — main and check meters on CTs and PTs of the required accuracy class — plus data loggers on every incomer, heat pump, steam, fuel and water line. Installed, tested, sealed and linked to the SLDC and to ergOS. Outcome: Every source and load visible in 15-minute blocks
- **Orchestrate.** ergOS forecasts 96 blocks, schedules with the SLDC, trades DAM, GDAM, RTM and GTAM, manages banking and battery health — and now dispatches heat pumps and thermal storage against price. Outcome: For the life of the assets

## Heat: The boiler, reinvented.

Almost all hotel heat is low-temperature: showers, dishwashing, laundry and the pool sit between 26 and 82 °C. Heat pumps are built for this — and the chillers already on site supply the heat.

| Duty | Temperature | Heat pump? |
|---|---|---|
| Guest-room hot water (stored at 60 °C+ for legionella control) | 55–65 °C | yes |
| Kitchen dishwashing (wash and final rinse) | 60–82 °C | yes |
| Laundry washers (linen and uniforms) | 40–80 °C | yes |
| Tumble dryers (heat-pump dryers available) | 60–90 °C | yes |
| Pool and spa (water and hall air) | 26–40 °C | yes |
| HVAC reheat and fresh air (humidity control) | 25–45 °C | yes |
| Flatwork ironers (remain on steam or gas) | 150–180 °C | stays on fuel |
| Cooking (remains on PNG, LPG or induction) | 180–200 °C | stays on fuel |

- **Heat sources we reuse.** Chiller condensers, kitchen and laundry exhaust, and warm grey water — a hotel rejects nearly as much heat as it buys.
- **Heating and cooling at once.** Hotels cool all year while making hot water all day. A heat pump on the chiller circuit delivers both, so the cooling you already pay for produces your hot water.
- **Sized from metered heat.** Portable heat meters log flow and temperature on candidate processes for two to four weeks before anything is sized.

## Economics: Low-cost electricity drives low-cost heat.

What one kWh of useful process heat costs, and what it emits, depending on where the heat comes from. The heat pump cuts cost on any electricity; green electricity is what cuts the carbon.

| Route | ₹ per kWh of useful heat | kg CO₂ per kWh-th |
|---|---|---|
| PNG-fired boiler (₹55/SCM · 85% efficiency) | 6.22 | 0.221 |
| Diesel (HSD) boiler (₹90/L · 85% efficiency) | 10.59 | 0.315 |
| LPG-fired heater (₹95/kg · 85% efficiency) | 8.73 | 0.274 |
| Heat pump on DISCOM electricity (₹8.5/kWh · COP 3.5) | 2.43 | 0.205 |
| Heat pump on green open access (₹5.5/kWh landed · COP 3.5) | 1.57 | 0.000 |
| Heat pump in solar blocks + store (₹4.0/kWh · COP 3.5) | 1.14 | 0.000 |

Illustrative only, not an offer. Assumptions: PNG 10.4 kWh/SCM, 1.95 kg CO₂/SCM; HSD 10.0 kWh/L, 2.68 kg CO₂/L; grid 0.716 kg CO₂/kWh (CEA baseline order of magnitude); green electricity treated as zero-emission on a market basis with green attributes retired. Heat pump COP 3.5 reflects hot water near 60 °C for guest rooms, drawn from the chiller condenser loop; COP falls as delivery temperature rises. Tariffs, fuel prices and COP vary by site and are replaced with metered values in the baseline. LPG: ₹95/kg, 12.8 kWh/kg, 2.98 kg CO₂/kg. Hotels on commercial tariffs may pay more than ₹8.5/kWh from the DISCOM, which strengthens the case for green open access.

## Roadmap: Baseline. Electricity. Heat. Proof.

1. **Baseline** (Weeks 1–4). Bills, load survey, fuel and steam records, portable heat metering on candidate processes, ESG data map. Outcome: Signed-off energy, heat and carbon baseline
2. **Roadmap** (Weeks 4–8). Green electricity plan across properties, heat pump shortlist for guest hot water, laundry and pool, and the ESG data map — in one business case. Outcome: One business case — electricity, heat, ESG
3. **Meter and log** (Weeks 6–12). ABT metering at the incomer and data loggers on electricity, heat, fuel and water lines — the measured base every later step is sized, settled and reported on. Outcome: ergOS live on metered data
4. **Electricity live** (~3 months after roadmap). Open access contracted and approved; rooftop solar and BESS where they fit; every source orchestrated against demand on ergOS. Outcome: Green electricity flowing
5. **Heat live** (Pilot, then scale). One heat-recovery heat pump and store on guest-room hot water at a pilot property; then laundry, pool and the rest of the portfolio. Outcome: Fuel displaced, measured on ergOS
6. **Operate and disclose** (Every block · every year). ergOS runs electricity and heat; esgOS publishes BRSR Core-format, CBAM, CDP and customer disclosures with an audit trail. Outcome: Assurance-ready numbers

Timelines indicative; confirmed after the baseline and dependent on state approvals and equipment lead times.

## 24-hour dispatch

A hotel's heat follows its guests: hot water in the morning and evening, laundry and kitchens through the day, the pool all the time. The heat pumps take that from the chillers' rejected heat, and the store carries the morning peak from the previous evening's cheap blocks.
## Facts

- Heat duties and temperatures: Guest-room hot water 55–65 °C (heat pump); Kitchen dishwashing 60–82 °C (heat pump); Laundry washers 40–80 °C (heat pump); Tumble dryers 60–90 °C (heat pump); Pool and spa 26–40 °C (heat pump); HVAC reheat and fresh air 25–45 °C (heat pump); Flatwork ironers 150–180 °C (stays on fuel); Cooking 180–200 °C (stays on fuel).
- PNG-fired boiler: ₹6.22 per kWh of useful heat, 0.221 kg CO₂/kWh-th
- Diesel (HSD) boiler: ₹10.59 per kWh of useful heat, 0.315 kg CO₂/kWh-th
- LPG-fired heater: ₹8.73 per kWh of useful heat, 0.274 kg CO₂/kWh-th
- Heat pump on DISCOM electricity: ₹2.43 per kWh of useful heat, 0.205 kg CO₂/kWh-th
- Heat pump on green open access: ₹1.57 per kWh of useful heat, 0.000 kg CO₂/kWh-th
- Heat pump in solar blocks + store: ₹1.14 per kWh of useful heat, 0.000 kg CO₂/kWh-th
- Plant areas with a lever: Guest hot water, Chiller plant, Laundry, Pools and spa, Portfolio reporting.

## Assumptions and limits

- Illustrative only, not an offer. Assumptions: PNG 10.4 kWh/SCM, 1.95 kg CO₂/SCM; HSD 10.0 kWh/L, 2.68 kg CO₂/L; grid 0.716 kg CO₂/kWh (CEA baseline order of magnitude); green electricity treated as zero-emission on a market basis with green attributes retired. Heat pump COP 3.5 reflects hot water near 60 °C for guest rooms, drawn from the chiller condenser loop; COP falls as delivery temperature rises. Tariffs, fuel prices and COP vary by site and are replaced with metered values in the baseline. LPG: ₹95/kg, 12.8 kWh/kg, 2.98 kg CO₂/kg. Hotels on commercial tariffs may pay more than ₹8.5/kWh from the DISCOM, which strengthens the case for green open access.
- Timelines indicative; confirmed after the baseline and dependent on state approvals and equipment lead times.

## Questions and answers

**Does it replace my boiler?**  
For loads up to 120 °C, yes — as the primary heat source. The boiler usually stays on standby and for any loads above that range.

**What if electricity is expensive?**  
Each kWh of electricity returns three to four kWh of heat, so heat costs roughly a third of the electricity price. On green open access, the carbon falls close to zero as well.

**What does the site need?**  
Spare electrical capacity, space near the heat users and a steady heat demand. A hot-water store smooths peaks and lets the unit run in the cheapest blocks.

**Is it proven?**  
It is the same refrigeration cycle as the chillers already on your site, run for heat. Industrial units are in service worldwide in food, chemicals, pharma and textiles.

## Related

- [The Hotels & Hospitality sector deck](https://joulewise.com/downloads/joulewise-hotels.html)
- [Heat Pump Studio](https://joulewise.com/studios/heat-pump)
- [Discuss your plant](https://joulewise.com/contact)

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