Hartford business energy: Eversource and steam

Who supplies a Hartford address, and why the loop comes first

Hartford is not one market but three overlapping ones, and the address decides which applies. For electricity the distribution company is Eversource Energy, the Connecticut Light and Power Company, which owns the wires the city's meters sit on. For natural gas, PURA's own account of how gas reaches Connecticut puts Connecticut Natural Gas, a subsidiary of Avangrid, in the greater Hartford area and in Greenwich, with Southern Connecticut Gas covering the Bridgeport and New Haven areas and Yankee Gas, now trading as Eversource Energy, covering the state's other gas territories. The third layer is the one that catches buyers out. Two district energy systems serve buildings in and around downtown, and a building on either of them does not buy its heating and cooling the way a conventionally served building does. A fourth possibility exists and is worth ruling out, because it is the one arrangement in which there is nothing to shop. PURA publishes the state's municipal electric distribution companies and lists six: Groton Utilities, Bozrah Light and Power, the Jewett City department of public utilities, Norwich Public Utilities, South Norwalk Electric and Water, and Wallingford's electric division. A municipal system is one of the circumstances in which no retail choice is available at all, so an address inside one of those six has no supplier decision to make. None of the six serves Hartford, which is why the competition that matters here is between suppliers selling into Eversource's territory rather than between distributors. Establishing which of these applies is the first step, because the rest of the file depends on the answer.

• Electric distribution in Hartford sits with Eversource Energy, the Connecticut Light and Power Company.
• Gas distribution in the greater Hartford area sits with Connecticut Natural Gas, an Avangrid subsidiary, per PURA's account of the state's local distribution companies.
• PURA places Southern Connecticut Gas in the Bridgeport and New Haven areas and Yankee Gas, trading as Eversource Energy, in the remaining gas territories.
• Six municipal electric distribution companies exist in Connecticut - Groton, Bozrah, Jewett City, Norwich, South Norwalk and Wallingford - and none serves Hartford; a municipal system has no retail choice at all.
• Two district energy loops serve buildings in and around downtown Hartford.

Two district energy systems in one downtown core

The state-owned system is the Capitol Area System, operated by a management unit inside the Department of Administrative Services. DAS describes it as a district heating and cooling loop in the Hartford Capitol District serving fifteen buildings, including the Legislative Office Building, the State Office Building and the Supreme Court, plus non-state entities such as The Bushnell theatre, across more than three million square feet of building space, and states that it supplies hot water for space heating, domestic hot water, and chilled water for space cooling. The private system is Hartford Steam Company, which DCO Energy describes as a city-wide district energy system combining heating, cooling and power, owned by Cartier Energy, a Vauban Infrastructure Partners company, with DCO Energy as a minority co-investor and the operator and maintainer. DCO names more than sixty customer buildings, including Travelers Insurance, Hartford Hospital, the Supreme Court Library, the Appellate Court, City Hall and the Institute of Living, and records that the downtown system has operated since 1962 and the South End system since 1999. The plant detail is published as capacity rather than price: a downtown system with chilled water capacity and millions of gallons of chilled water storage, a steam capacity measured in thousands of pounds an hour, an electric capacity in a combined heat and power configuration with a heat recovery steam generator, and a fuel cell serving the hospital campus in the South End. The consequence for a buyer is structural rather than commercial: a building on a loop buys thermal energy under a service agreement with the loop's owner, and the supply question it can take to market is the electricity behind its own meter.

• The Capitol Area System is state-owned, run by a management unit in the Department of Administrative Services, and serves fifteen buildings across more than three million square feet.
• DAS names the Legislative Office Building, the State Office Building, the Supreme Court and The Bushnell theatre among its customers, and lists hot water for space heating, domestic hot water and chilled water for cooling.
• Hartford Steam Company is owned by Cartier Energy, a Vauban Infrastructure Partners company, with DCO Energy as minority co-investor and operator.
• DCO Energy names more than sixty customer buildings, including Travelers Insurance, Hartford Hospital, City Hall and the Institute of Living.
• The downtown system dates from 1962 and the South End system from 1999; the downtown plant runs combined heat and power with chilled water capacity and storage, and a fuel cell serves the hospital campus.

Where a Hartford business does have a choice, and how the class line is drawn

On an Eversource account the contestable part is generation supply. The wires, the meter and the delivery charges stay with the utility, whose own default supply is Standard Service, approved by PURA on a six-month cycle. Which supply arrangement applies to an account depends on its size rather than the owner's preference, because the Connecticut Light and Power tariff draws the line in kilowatts. Rate 30 is the small general electric service, available where the customer's maximum demand is under 200 kW. Rate 35 is the intermediate general electric service, covering the same size band delivered at one standard voltage. Rate 27 and Rate 37 are the time-of-day variants of those two schedules, available up to 350 kW. The tariff then adds a rule that matters to a growing site: an account whose maximum demand is 200 kW or more but under 350 kW must take service under Rate 27 or Rate 37, and is not eligible to return to Rate 30 or Rate 35 if its demand later falls back below the line, per a decision in Docket No. 05-10-03. The class position is therefore sticky in one direction. A Hartford site planning an electrification project, a chiller replacement or a new production line should price the schedule change as part of the project rather than discovering it on the first bill after commissioning.

• Only generation supply is contestable on an Eversource account in Hartford; the wires, meter and delivery charges stay with the utility.
• Standard Service is the utility's default supply and is approved by PURA on a six-month cycle.
• Rate 30, small general electric service, applies where maximum demand is under 200 kW; Rate 35 covers the same band at one standard voltage.
• Rate 27 and Rate 37 are the time-of-day variants, available up to 350 kW.
• An account reaching 200 kW must take service under Rate 27 or Rate 37 and cannot return to Rate 30 or Rate 35 afterwards.

The demand definition decides what an office tower pays for

Hartford's commercial load is unusually institutional and office-heavy, and that shape interacts with the way the tariff measures demand. Rate 30 defines demand as the highest average thirty-minute kilowatt demand recorded during the billing month, with a floor of two kilowatts rather than a ceiling: billing demand cannot fall below the floor, no ratchet carries a summer peak into the winter months, and the schedule carries no power-factor adjustment. Two separate demand components ride on that measurement, one inside the distribution service rate and one inside the transmission service rate, and both are applied to demand above the floor. An account's exposure is therefore driven by the single highest thirty-minute window in each month rather than by the volume of energy it consumes. The arithmetic that makes this legible is a load factor the reader computes from their own interval data: take the kilowatt-hours in a month, divide by the product of the maximum demand and the number of hours in that month, and read the result as a percentage. A high-rise with heavy chillers and a sharp summer peak will show a lower figure than a round-the-clock institutional building with the same annual consumption, and it is that ratio rather than the annual total that decides how much of the delivery charge behaves like a fixed cost. Note the context for why supply matters here at all: EIA's Connecticut profile shows the state's commercial rate above the national average, which is backdrop for the decision, not a quote for any particular business.

• Rate 30 measures demand as the highest average thirty-minute kilowatt demand in the billing month, with a floor of two kilowatts.
• The schedule carries no demand ratchet and no power-factor adjustment; the minimum charge is the customer charge.
• Distribution and transmission each carry their own demand charge, applied above the floor.
• A cooling-peaked office tower and a flat-load institutional building get different outcomes from the same annual consumption.
• Load factor is kilowatt-hours divided by maximum demand times the hours in the month, expressed as a percentage.

The public and institutional share, and the data a tenant can get

A large share of Hartford's floor area is public or institutional, which changes the answer to a question a tenant would ask anywhere else. Connecticut requires the state to measure its own buildings: DEEP's Leading by Example report cites Connecticut General Statutes Section 16a-37t, which lets the department benchmark the energy and water consumption of state-owned or state-operated residential and nonresidential buildings with a gross floor area of ten thousand square feet or more using the Environmental Protection Agency's Energy Star Portfolio Manager, and the state carries that benchmarking out through a utility-data platform rather than from paper bills. For a business leasing space in a state-managed building the consequence is that the building's consumption is measured by its landlord under a statutory duty, and the account the tenant can take to market may be limited to the electricity it meters itself. For a privately held building the same logic runs the other way: the usage history a supplier needs is the account's own twelve months of consumption, obtained either by a utility data release or by reading the bills, in the units the bill uses. And because the state's own Capitol District heating and cooling arrives through the Capitol Area System rather than being bought by each building, a downtown address may have no separate thermal purchase to put out to bid at all, which is worth establishing before a supplier's questionnaire assumes one.

• DEEP's Leading by Example reporting cites CGS Section 16a-37t: state-owned or operated buildings of ten thousand square feet or more are benchmarked with EPA Energy Star Portfolio Manager.
• The state carries that benchmarking out through a utility-data platform rather than from paper bills.
• A tenant in a state-managed building may find the contestable account is limited to the electricity it meters itself.
• For a private building, the usage history a supplier needs is the account's own twelve months, from a utility data release or from the bills.
• A Capitol District address on the Capitol Area System may have no separate thermal purchase to bid.

What to assemble before a Hartford energy quote

The file a Hartford quote needs starts with the two bills and the building's service arrangement. Establish first whether the premises sit on a district energy loop, because that decides whether heating and cooling are in scope at all, and take the electric rate schedule from the bill itself, since the schedule rather than the business type drives the charges. Then gather twelve months of consumption by month, the maximum demand reading for each month, the account and meter numbers, and the contract's end date and notice period taken from the agreement rather than the invoice. Ask who delivers each fuel to the address and get it confirmed in writing, because the utility that delivers is the one whose default supply any offer has to beat, and check whether the site's class is the one you assumed. Competitive supply depends on the service address, the meter and the utility territory, and municipal utilities, cooperatives and some jurisdictions have no choice at all. HighGround works as an advisor-assisted channel rather than a rate table, sourcing electricity and natural gas supply through the Broker Online Exchange supplier network. HighGround may receive provider compensation on completed purchases, and an inquiry places no order and switches no supplier.

• Confirm whether the premises sit on a district energy loop before treating heating and cooling as contestable.
• Take the electric rate schedule from the bill rather than from the business's own description.
• Twelve months of consumption by month, plus the maximum demand reading for each month.
• Account and meter numbers, and the contract end date and notice period taken from the agreement.
• Ask the utility in writing which company delivers each fuel to the address, and confirm the site's rate class.
• Competitive supply depends on the service address, the meter and the utility territory; municipal utilities, cooperatives and some jurisdictions have no choice at all.
• HighGround may receive provider compensation on completed purchases, and an inquiry places no order and switches no supplier.

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