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HomeMy WebLinkAbout05112026 City Council Laydown - KaluzaSeward HarborMaster Building — Heating System AnalysisMay 2026 Citizen Comments Laydown Phil Kaluza 5/11/2026 CC Meeting HEATING SYSTEM SELECTION FOR THE SEWARD HARBORMASTER BUILDING An Independent Economic and Technical Analysis Prepared by: Philip Kaluza Independent Energy Advisor May 2026 Prepared for: Seward City Council City of Seward, Alaska All cost estimates are pre -engineering placeholders. Final installed costs and energy loads to be confirmed by RSA Engineers. -20 ft 200- 250 ft bore depth HarborMaster Building 68-72°F year-round Radiant floor slab (tubing embedded) • • • Grade Alluvial gravel — unsaturated Mechanical room Heat pump unit Water -to -water • COP 4.0 200,000 BTU/hr capacity T To bore • Tidal water table ♦ From bore Fluctuates with Resurrection Bay tides Alluvial gravel — tidal saturated Several hundred feet deep • Continuously recharged by Resurrection Bay tides Bore field remains entirely within saturated alluvial gravel — no hard rock drilling • Legend — — — . Warm supply (from bore to building) — — — . Cool return (from building to bore) Bore1 I - Bore 2 Bore 3+ Shoreline / Bay 4 — Tidal recharge from bay carries heat into bore field Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 1. Executive Summary The City of Seward faces a significant and time -sensitive decision regarding the heating system for the new HarborMaster Building. Two options are under consideration: a conventional oil -fired hot water boiler with high -temperature baseboard distribution, and a closed -loop vertical ground source heat pump (GSHP) with low -temperature radiant floor distribution. This analysis demonstrates that the GSHP option is financially superior under every plausible combination of oil price and electricity rate assumptions — and that the margin of superiority is substantial. Four numbers define the financial case: Federal Tax Credit -$27,000 Net GSHP Premium -$55,000 Conservative Payback 9 Years 20-Year Net Gain $125,000- Direct IRS cash payment At $4.00/gal oil & 270/kWh $343,000 to City via §48 Elective Additional first cost after electricity no assumed rate Range across all scenarios Pay federal tax credit applied reductions after recovering $55K net premium The federal Investment Tax Credit (IRC §48) provides a direct cash payment — not a tax deduction — of approximately $27,000 to the City of Seward upon installation of the GSHP system. As a tax-exempt municipal government, the City qualifies for this payment under the "elective pay" provision (IRC §6417), enacted in 2022 and confirmed intact under current law through 2034. This payment reduces the net cost premium of the GSHP over the oil boiler to approximately $55,000. That $55,000 net premium is recovered within 9 years under the most conservative assumptions in this analysis — oil at $4.00/gal (below current prices) with no reduction in Seward's current 270/kWh electricity rate. Under more realistic assumptions, payback occurs in 4 to 6 years. Over a 20-year horizon, the GSHP generates a net financial advantage of $125,000 to $343,000 compared to the oil boiler, depending on scenario. These figures account for fuel costs only; GSHP maintenance savings of an estimated $600—$1,000 per year are not included and represent additional upside. A critical practical constraint bears on the timing of this decision: If the City intends to pour the foundation slab before freeze-up, radiant floor tubing must be specified and installed in the slab now. This cannot be retrofitted. Delaying the heating system decision past the slab pour permanently forecloses the GSHP option — regardless of future economic analysis. The Council's decision is therefore not merely financial; it is also a construction sequencing matter with an imminent deadline. The waste oil question — raised as a potential advantage for the oil boiler option — does not survive scrutiny. The existing HarborMaster Building already consumes the entire waste oil supply collected from harbor operations (approximately 2,500-3,000 gallons per year). That supply cannot simultaneously fuel both the existing and new buildings. Installing a waste oil boiler in the new building does not create additional waste oil — it simply competes with the existing facility for a fixed supply, while adding regulatory burden and storage infrastructure. This is a zero -sum proposition, not a cost savings. Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 The Council is asked to: • Direct RSA Engineers to develop cost estimates for both heating system options using the building's design load and to provide load calculation worksheets for independent review. • Authorize inclusion of radiant floor tubing in the foundation slab specification immediately, preserving the GSHP option pending RSA's cost confirmation. • Engage a §48-qualified tax advisor to confirm ITC eligibility and maximize the City's eligible cost basis prior to bid advertisement. 2. Background and Purpose The City of Seward is constructing a new HarborMaster Building to replace the aging existing facility at the Small Boat Harbor. The new building is approximately 10,000 square feet and will serve year-round operational functions including harbor administration, public -facing services, and staff facilities. This analysis was prepared independently by Philip Kaluza, brings more than 50 years of experience in cold -climate building science and Alaska energy systems, including prior service as Alaska State Energy Program Manager. The purpose of this paper is to provide the City Council with a technically grounded and financially rigorous comparison of the two primary heating system options, independent of the A&E procurement process. All cost estimates herein are pre -engineering placeholders; Engineers' bid -level cost estimates should be substituted when available. 3. System Options Compared The two systems under consideration are fundamentally different in energy source, distribution approach, operating economics, and long-term infrastructure implications. Table 1: System Comparison Heat source Distribution system Seasonal efficiency Equipment life On -site combustion Fuel storage required Oil -Fired BoilerHigh-Temp Baseboard No. 2 / #1 Fuel Oil High -temp baseboard 160-180°F supply 80% AFUE 20-25 yrs boilerl5 yrs baseboard Yes — flue, CO risk,regulatory requirements Yes — AST with secondary containment Closed -Loop Vertical GSHPLow-Temp Radiant Floor Ground -coupled electricity Low -temp radiant floor90-110°F supply COP 4.0 (400% equiv.) 20-25 yrs heat pump 50+ yrs ground loop None None Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 Federal tax credit available Estimated installed cost Net cost after ITC None -$27,000 direct payment $59,000-98,000(midpoint $121,000-200,000(midpoint -$78,000)-$160,000) -$78,000 -$133,000(premium: --$55,000) The GSHP system extracts heat from the ground via a closed -loop vertical bore field. A water -to -water heat pump unit upgrades that heat to the temperature required for building distribution. At a design COP of 4.0, the system delivers four units of heat for every unit of electricity consumed — equivalent to 400% efficiency, compared to 80% for the oil boiler. The low -temperature radiant floor distribution is not merely a preference — it is the enabling condition for the GSHP's design efficiency. Radiant systems operate at 90-110°F supply water temperature, which is well within the heat pump's optimal operating range. High -temperature distribution (160-180°F) would force the heat pump to operate at substantially degraded performance. The two systems are therefore designed as an integrated whole, not interchangeable components. A test well was previously completed by a local driller near the site, confirming ground conditions suitable for vertical closed -loop installation and establishing the feasibility of using local drilling resources. 4. The Waste Oil Question: A Zero -Sum Analysis The oil boiler option has been associated with the potential use of waste oil collected from Small Boat Harbor operations. This section examines whether waste oil represents a genuine financial advantage for the new building's heating system. 4.1 Current Waste Oil Supply and Demand The City of Seward has provided data indicating that harbor collection sites yield approximately 2,500-3,000 gallons of waste oil per year. The existing HarborMaster Building currently consumes this entire supply as a supplement to purchased heating oil. In the most recent documented period, the existing building also purchased approximately 3,000 gallons of heating oil — indicating that waste oil alone does not meet the existing building's total heating demand. The supply -demand situation is straightforward: the waste oil supply is fully committed to the existing building which is to continue to be heated for the foreseeable future. It is not available to fuel the new building without diverting it from its current use. Installing a waste oil boiler in the new building does not generate additional waste oil — it creates competition between two buildings for a fixed annual supply of 2,500-3,000 gallons. The Council should therefore evaluate the oil boiler option on the basis of purchased fuel costs only. The waste oil supply's value belongs to the existing facility regardless of what system is installed in the new building. This is a zero -sum proposition. 4.2 Regulatory Considerations Waste oil combustion and storage is subject to federal and state regulatory oversight that imposes ongoing compliance obligations and potential liability: Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 • EPA 40 CFR Part 279 governs the management of used oil as a fuel, including storage, handling, and burner specifications. Facilities burning used oil are subject to inspection and reporting requirements. • ADEC regulations impose additional Alaska -specific requirements for above -ground storage tanks (ASTs), secondary containment, and spill prevention. • Harbor waste oil collection streams carry a risk of halogen contamination from chlorinated solvents, antifreeze, and other marine maintenance products. Contaminated waste oil exceeding regulatory thresholds cannot legally be burned as a fuel and must be disposed of as hazardous waste — at the City's expense. • The processing and filtration equipment for the waste oil system — storage tanks, filters, transfer pumps — already exists in the existing HarborMaster Building. Replicating this infrastructure in the new building represents an additional capital cost not present in a GSHP installation. Future regulatory tightening of waste oil combustion standards is a plausible risk factor that could further reduce or eliminate the operational viability of waste oil heating in either building. The GSHP system carries no analogous regulatory exposure. 5. Federal Investment Tax Credit: Direct Payment to the City 5.1 How the Credit Works for a Municipality The federal Investment Tax Credit (ITC) under IRC §48 provides a credit equal to 30% of eligible geothermal heat pump system costs for projects under 1 megawatt of capacity. Ordinarily, tax credits benefit only entities with federal tax liability — which would exclude the City of Seward as a tax-exempt municipal government. However, the Inflation Reduction Act of 2022 introduced "elective pay" (also called "direct pay") under IRC §6417, which allows tax-exempt entities — including state and local governments — to receive the ITC as a direct cash payment from the IRS. In plain terms: the federal government writes the City a check. There is no tax liability requirement, no complex structuring, and no third -party investor needed. The City files IRS Form 3468 with its annual information return and receives the payment directly. This credit is available under current law through 2034 and has been confirmed intact following the One Big Beautiful Bill Act (2025), which preserved geothermal heat pump credits under §48 with bipartisan support. 5.2 Estimated Credit Amount The eligible cost basis includes the ground loop (bore field, HDPE piping, grouting), the heat pump unit, primary hydronic distribution components (pumps, buffer tank, piping, controls), and potentially the radiant floor tubing as a functionally integral distribution component. On a conservative basis excluding the radiant floor: • Ground loop (bore field): —$55,000 • Heat pump unit: —$16,000 • Primary hydronic system (pumps, buffer tank, controls): —$20,000 • Conservative eligible basis: --$91,000 • 30% ITC direct payment: —$27,000 Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 A cost segregation study performed by a §48-qualified tax advisor prior to bid advertisement could increase the eligible basis — potentially including the radiant floor tubing — and increase the direct payment accordingly. The $27,000 figure used throughout this analysis is intentionally conservative. 6. Methodology and Assumptions 6.1 Heating Load and Fuel Consumption The new HarborMaster Building's design heating load was estimated at 120,000 BTU/hr, based on analysis using the Alaska Heat Pump Calculator with Seward climate data. The installed system capacity is presented to RSA Engineers as 200,000 BTU/hr to accommodate a standard engineering safety margin. Annual oil consumption for the oil boiler option was estimated at 3,000 gallons per year — a field -calibrated figure derived from the calculator output and validated against the existing building's known consumption. The existing building, which is older, less insulated, and includes public showers operating year-round, consumes approximately 6,000 gallons per year total (waste oil plus purchased). The new building's 3,000-gallon estimate at roughly half the existing building's consumption is consistent with a modern, well -insulated structure without year-round hot water demand at the same scale. Fuel parameters: #1 heating oil at 136,000 BTU/gal heating value; oil boiler AFUE 80% (standard non -condensing). Annual heat delivered: approximately 326 MMBtu/yr. GSHP electricity consumption: 326 MMBtu _ COP 4.0 - 0.293 kWh/MMBtu = 23,885 kWh/yr. COP 4.0 is a conservative midpoint for a closed -loop vertical GSHP in Seward's ground conditions; manufacturer data for commercial units in similar climates typically shows seasonal COP of 3.5-4.5. 6.2 Price Scenarios Three scenarios were developed to bracket the plausible range of future fuel and electricity prices. In all scenarios, oil price escalation is 3% per year (consistent with EIA long -run reference case for distillate fuels, Alaska delivered). Maintenance cost differentials are excluded from all scenarios as a conservative measure; the GSHP is estimated to save $600—$1,000 per year in maintenance, tank inspection, and regulatory compliance costs. Conservative Scenario: Starting oil price $4.00/gal — below current prices, assuming energy market normalization. Starting electricity 270/kWh — current Seward winter retail rate, no assumed reductions. Electricity escalation 1 %/yr. This scenario is deliberately structured to give the oil boiler every reasonable advantage. Base Case Scenario: Starting oil price $4.75/gal — consistent with EIA normalized Alaska delivered distillate pricing. Starting electricity 220/kWh — reflecting a modest rate reduction from the pending Seward Electric rate study. Electricity escalation 1 %/yr. Optimistic Scenario: Starting oil price $6.00/gal — approximately current delivered prices. Starting electricity 180/kWh — the heat pump incentive rate discussed by Seward Electric Department, which would require completion of the rate study and Council action. Electricity held flat (conservative, given potential hydro rate reduction). 7. 20-Year Financial Analysis Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 Table 2 presents the 20-year financial comparison across all three scenarios. Year -by -year detail for each scenario is provided in Appendix A. Table 2: 20-Year Financial Summary — Three Scenarios Assumptions Starting oil price ($/gal) Starting electricity rate (¢/kWh) Oil escalation / Elec escalation CONSERVATIVE BASE CASE $4.00 27¢ 3%/1% $4.75 22¢ 3%/1% OPTIMISTIC $6.00 18¢ 3% / flat Year 1 Operating Costs Oil boiler annual fuel cost GSHP annual electricity cost Year 1 annual savings $12,000 $14,250 $18,000 $6,449 $5,551 $5,255 $8,995 $4,299 $13,701 20-Year Results Simple payback (net of $27K ITC) Cumulative oil system fuel cost Cumulative GSHP electricity cost 20-year fuel cost savings Year 9 Year 6 Year 4 $322,444 $382,903 $483,667 Net 20-year gain (after $55K premium) $142,001 $180,444 $125,444 $115,704 $85,987 $267,199 $397,680 $212,199 $342,680 The results are consistent and compelling across all scenarios. Even under the most conservative assumptions — oil at $4.00/gal with no electricity rate reductions — the GSHP recovers its net cost premium within 9 years and generates a 20-year net financial advantage of $125,444 over the oil boiler. Under base case assumptions, the advantage reaches $212,199 with a 6-year payback. Under conditions closer to today's actual energy prices, the payback is 4 years and the 20-year advantage exceeds $342,000. These figures represent fuel costs only. GSHP maintenance savings, ADEC regulatory compliance costs avoided, and the value of budget predictability (eliminating exposure to oil price volatility) are not included. Each represents additional financial benefit to the City. 8. What Would Have to Be True for Oil to Win? A useful stress test for any financial analysis is to ask: under what conditions does the alternative perform better? For the oil boiler to outperform the GSHP over a 20-year horizon, all of the following conditions would need to hold simultaneously: Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 Table 3: Stress Test — Conditions Required for Oil Boiler to Outperform GSHP For oil to win, ALL of the following would have to be simultaneously true: Oil prices fall back to and stay below--$2.50/gal delivered Oil prices stay flat or decline over 20 years Electricity rates rise significantly above current 270/kWh The federal $27,000 ITC direct payment is unavailable The GSHP ground loop cannot be installed locally Reality check Current price exceeds $6.00/gal. EIA long -run reference: $4.50-5.00/gal Alaska delivered. Global energy trends, Alaska supply logistics, and inflation all point toward long -run oil price increases. Seward Electric is pursuing rate reduction. Godwin Creek hydro, if developed, would lower rates further. A rate increase of this magnitude has no identified mechanism. The City of Seward qualifies as a tax-exempt municipal entity under IRC §6417. The credit is available under current law through 2034. A test well was successfully completed by a local driller, confirming feasibility and eliminating outside contractor mobilization costs. No plausible scenario places all five conditions in the oil boiler's favor simultaneously. The GSHP financial case is robust to individual assumption changes; it requires a confluence of highly improbable conditions to fail. 9. Non -Financial Considerations Several factors not captured in the fuel cost analysis further favor the GSHP: • Budget predictability: The GSHP converts the majority of the building's heating cost from a volatile commodity (oil) to a utility rate (electricity). Seward Electric's rate structure is more stable and predictable than the heating oil market, simplifying long-range budget planning. • No on -site combustion: The GSHP eliminates flue systems, CO risk, combustion air requirements, and associated insurance and code compliance obligations. • No fuel storage infrastructure: Above -ground storage tanks require secondary containment, periodic inspection, spill prevention plans, and eventual decommissioning — none of which apply to the GSHP. • Grid alignment: The GSHP presents a stable, non -peaking electrical load that is favorable to Seward Electric's load factor. This characteristic supports the case for a dedicated heat pump incentive rate, which the Electric Department has indicated it is considering. • Ground loop longevity: The vertical bore field has an expected service life exceeding 50 years — substantially outlasting either the heat pump unit or the boiler. Future heat pump replacements inherit an existing ground loop at no additional drilling cost. • Environmental profile: The GSHP produces no on -site combustion emissions. As Seward's grid becomes cleaner — particularly with potential hydro additions — the system's carbon footprint approaches zero. Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 10. Critical Path: The Slab Pour Decision The most urgent practical issue in this analysis is construction sequencing, not long-term economics. The City has indicated an intention to pour the new building's foundation slab before freeze-up. If radiant floor tubing is not included in the slab specification before that pour occurs, the low -temperature distribution system required for optimal GSHP performance cannot be installed. Concrete slabs cannot be retrofitted with embedded tubing after the pour. This decision point is irreversible. The good news is that specifying and installing radiant floor tubing in the slab is a low-cost, low -risk action that preserves optionality. The tubing and manifolds represent a modest incremental cost at the time of the pour — far less than the total GSHP system — and commit the City to nothing beyond keeping its options open. If the Council ultimately selects the oil boiler, the radiant floor heating is still an affordable and comfortable space heating option. If the Council selects the GSHP, the critical enabling infrastructure is already in place. The Council should therefore authorize inclusion of radiant floor tubing in the slab specification as an immediate action, independent of the final heating system decision. Waiting for Engineers' full analysis before acting on the slab specification risks losing the GSHP option entirely to a construction deadline. 11. Conclusions This analysis supports the following conclusions: • The closed -loop vertical GSHP with low -temperature radiant distribution outperforms the oil -fired boiler on every financial metric across all three price scenarios examined. • The federal §48 ITC direct payment of approximately $27,000 is available to the City of Seward as a qualifying tax-exempt municipal entity under current law, materially reducing the GSHP's net cost premium. • The waste oil supply from harbor operations is fully committed to the existing HarborMaster Building and is not available to fuel the new building without diverting savings from the existing facility. The new building must be evaluated on purchased fuel costs regardless of which system is selected. • Under conservative assumptions ($4.00/gal oil, 270/kWh electricity, no rate reductions), the GSHP pays back its net premium in 9 years and generates a $125,000 net financial advantage over 20 years. Under more realistic current -price assumptions, payback is 4-6 years and the 20-year advantage ranges from $212,000 to $343,000. • The slab pour deadline creates an immediate construction sequencing decision that must be resolved before the heating system selection can be fully deferred. Radiant floor tubing should be specified into the slab immediately to preserve the GSHP option. 12. Next Steps The following actions are recommended: • Immediate — Slab specification: Authorize inclusion of radiant floor hydronic tubing in the HarborMaster Building foundation slab specification, preserving the GSHP option pending final system selection. Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 • Near -term — Engineering direction: Direct Engineers to develop bid -level cost estimates for both the oil boiler and closed -loop vertical GSHP options, using the building's actual design load. Request that load calculation worksheets be made available for independent review. • Near -term — Tax credit confirmation: Engage a tax professional experienced with IRC §48 elective pay to confirm the City's eligibility, identify the maximum defensible eligible cost basis, and advise on filing requirements. This step is most valuable if completed before bid advertisement so that the system specification can be structured to maximize the credit. • Prior to bid: Obtain competitive pricing for the GSHP ground loop from local drilling resources, using the previously completed test well as a reference for site conditions and costs. • Council decision: Upon receipt of Engineers' cost estimates, revisit this financial analysis with actual installed costs substituted for placeholder figures. The analytical framework and scenario structure presented here remains valid; only the inputs change. Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage Seward HarborMaster Building — Heating System AnalysisMay 2026 Appendix A: Year -by -Year Cost Detail Detailed annual fuel cost tables for all three scenarios are contained in the companion document: "Seward HarborMaster Building — 20-Year Heating Cost Comparison" (separate file). Appendix B: Technical Notes and Data Sources 1. Heating load estimate derived from the Alaska Heat Pump Calculator using Seward, Alaska climate data. Design load: 120,000 BTU/hr. Installed capacity presented to RSA Engineers: 200,000 BTU/hr (with standard engineering safety margin). 2. Annual oil consumption estimate of 3,000 gal/yr derived from calculator output and validated against the existing HarborMaster Building's known consumption of approximately 6,000 gal/yr total (a larger, older, less -insulated building with year-round public shower demand). 3. #1 heating oil heating value: 136,000 BTU/gal. Boiler AFUE: 80% (standard non -condensing commercial boiler). Annual heat delivered: 3,000 x 136,000 x 0.80 = 326,400,000 BTU = 326 MMBtu/yr. 4. GSHP annual electricity: 326 MMBtu x 293.07 kWh/MMBtu = COP 4.0 = 23,885 kWh/yr. COP 4.0 is a conservative seasonal average; manufacturer specifications for commercial water -to -water units in similar ground conditions typically show COP 3.5-4.5. 5. Waste oil data provided by the City of Seward: harbor collection approximately 2,500-3,000 gal/yr; purchased supplemental oil approximately 3,000 gal at $3.30/gal (-$10,000) for the existing building. 6. IRC §48 ITC eligible basis: conservative estimate excludes radiant floor slab. Includes ground loop, heat pump unit, primary hydronic distribution, and integrated controls (-$91,000). 30% credit: -$27,000. A §48-qualified cost segregation study may increase the eligible basis. Credit available through 2034 under current law. 7. Oil price escalation: 3%/yr, consistent with EIA Annual Energy Outlook reference case for distillate fuels. Electricity escalation: 1%/yr (conservative and base case); flat (optimistic). All escalation rates are nominal. 8. Net GSHP premium: estimated installed cost difference (-$82,000 midpoint) less §48 ITC direct payment (-$27,000) = -$55,000. All installed cost figures are pre -engineering placeholders subject to RSA Engineers' bid -level confirmation. 9. Maintenance cost differential excluded from all scenarios (conservative approach). Estimated GSHP maintenance advantage: $600-1,000/yr vs. oil boiler (burner service, fuel storage tank inspection, AST regulatory compliance, spill prevention plan maintenance). This differential, if included, would reduce all payback periods and increase all 20-year net gain figures. 10. A local Seward well driller successfully completed a test well near the HarborMaster Building site, confirming ground conditions suitable for closed -loop vertical installation. Use of local drilling resources is assumed to eliminate outside contractor mobilization costs, a material cost advantage for the GSHP option. Prepared by Philip Kaluza, Independent Energy Advisor • City of Seward, AlaskaPage