Route 38 Corridor Pelham NH Rural Propane-to-Heat-Pump Conversion — Case Study

Property: Approximately 2,300 sq ft rural single-family residential, Route 38 corridor Pelham NH
Owner: T.M. (property owner alias)
Scope: Aging propane furnace and central AC replaced with mid-tier Bosch IDS 2.0 variable-capacity heat pump using existing ductwork; complete propane elimination including 500-gallon aboveground propane tank decommissioning; NH regulatory framework applied to rural Pelham NH propane conversion
Timeline: Diagnostic and design 3 weeks, installation 5 days, propane tank decommissioning 1 additional day (coordinated with licensed propane contractor)
Investment: $23,800 combined installation and propane tank scope, $2,000 NH Saves heat pump rebate, $2,000 IRA 25C federal tax credit, net $19,800

Situation

T.M. owns a rural single-family residential property along the Route 38 corridor in Pelham NH. Route 38 is Pelham NH’s primary north-south route through the town connecting to Salem NH to the north and Massachusetts (Dracut and Lowell area) to the south. The Route 38 corridor hosts diverse residential development from mid-20th century subdivisions through more recent contemporary construction, with the substantial Pelham NH propane retention pattern typical throughout.

Pelham NH propane retention context is a defining characteristic of the town’s HVAC scope. Approximately 50-70% of Pelham NH properties operate on propane heating (aboveground or underground tanks) or fuel oil heating rather than Liberty Utilities natural gas — substantially higher propane retention than rural Salem NH (15-25% typical) and reflecting Pelham NH’s more consistently rural residential character throughout the town. Liberty Utilities gas coverage in Pelham NH is limited primarily to the more developed areas near Route 38 and other primary roads; substantial portions of the town’s residential properties remain on propane retention.

T.M.’s property configuration: approximately 2,300 sq ft two-story residential on approximately 1.8 acre rural lot, forced-air propane furnace serving ducted distribution throughout, matching central AC installed with the propane furnace approximately 17 years ago, 500-gallon aboveground propane tank in side-yard (aboveground rather than underground per T.M.’s preference at time of previous installation), propane water heater in basement mechanical space (T.M. planning coordinated heat pump water heater replacement for complete propane elimination at time of current installation).

T.M. requested Rivic assess replacement options with priorities: (1) complete propane elimination through both heat pump installation and coordinated heat pump water heater replacement for full fossil-fuel elimination scope, (2) aboveground propane tank complete decommissioning coordinated with licensed propane contractor, (3) NH Saves rebate coordination including both heat pump rebate and heat pump water heater rebate as separate qualifying scope, (4) mid-tier equipment specification matching rural Pelham NH residential market context.

Complete Propane Elimination — Heat Pump + Heat Pump Water Heater Coordination

T.M.’s installation scope includes coordinated heat pump and heat pump water heater installation for complete propane elimination on the property. This approach differs from the rural Salem NH case study (partial propane retention with future coordinated water heater replacement) and represents a more complete NH conversion scope suitable for property owners ready to eliminate propane entirely in a single installation cycle:

• Rationale for coordinated approach: T.M.’s propane water heater at approximately 15-year age was approaching end-of-life, making coordinated replacement during the current installation cycle appropriate. Delaying replacement would require continued reduced-demand propane service for the water heater plus another coordinated future installation for eventual replacement. Coordinated approach eliminates propane service entirely in single installation cycle.
• Heat pump water heater specification: Rheem ProTerra hybrid heat pump water heater 80-gallon capacity matched to T.M.’s household hot water demand; ENERGY STAR certified with typical efficiency 3.5-4.0 UEF (uniform energy factor) vs approximately 0.65-0.72 EF for propane water heater — substantially higher efficiency plus complete propane elimination.
• Heat pump water heater installation: installed in basement mechanical space with adequate ambient temperature (heat pump water heaters extract heat from ambient air, cooling the surrounding space; basement configuration typically ideal given natural cooler baseline temperature and adequate air volume for heat extraction).
• Combined NH Saves rebate scope: heat pump installation qualifies for $2,000 rebate; heat pump water heater qualifies for separate rebate approximately $600-$1,000 depending on NH Saves scope tier. Combined total NH Saves rebate scope larger than single-scope installations.

Correction to investment summary: including heat pump water heater scope adds approximately $2,800 to the base heat pump installation cost (Rheem ProTerra 80-gallon equipment plus installation labor). Total revised installation cost approximately $26,600 combined including heat pump water heater. Additional NH Saves rebate approximately $800 for heat pump water heater scope. Revised net investment approximately $21,800 after combined rebates.

The below investment summary is corrected accordingly to reflect the actual coordinated scope.

Diagnostic and Assessment

Andrew Samples conducted the initial diagnostic assessment. Kathleen Brennan coordinated licensed propane contractor for aboveground tank decommissioning scope and NH Saves rebate coordination for combined heat pump + heat pump water heater rebate scope.

Key findings: (1) 17-year propane furnace with declining efficiency at end-of-life range, (2) 17-year central AC with declining efficiency and typical refrigerant charge decline, (3) 15-year propane water heater at end-of-life range appropriate for coordinated replacement, (4) existing ductwork acceptable for heat pump conversion with minor sealing improvements, (5) 200A Eversource NH electric service adequate for both heat pump and heat pump water heater installation, (6) basement configuration suitable for heat pump water heater installation with adequate ambient air volume for heat extraction, (7) 500-gallon aboveground propane tank decommissioning through licensed propane contractor with tank pickup and removal (simpler and less expensive than underground scope).

ACCA Manual J load calculation determined property heating load at 4°F winter design of approximately 46,000 BTU/hr and cooling load at 88°F summer design of approximately 32,000 BTU/hr.

Solution: Mid-Tier Bosch IDS 2.0 + Rheem ProTerra Heat Pump Water Heater

Rivic recommended Bosch IDS 2.0 mid-tier variable-capacity heat pump 4-ton nominal capacity with existing ductwork utilization plus Rheem ProTerra heat pump water heater 80-gallon capacity. Combined equipment specification: (1) Bosch IDS 2.0 inverter-driven variable-capacity outdoor unit, (2) Bosch matched indoor air handler with variable-speed ECM blower, (3) Bosch standard programmable thermostat, (4) 5-year Bosch parts warranty + 10-year compressor warranty on heat pump scope, (5) Rheem ProTerra 80-gallon hybrid heat pump water heater with 3.5-4.0 UEF efficiency, (6) 10-year Rheem tank warranty + 10-year parts warranty on heat pump water heater scope.

Existing ductwork utilization: minor duct sealing improvements at accessible joints; supply and return grille inspection confirmed adequate condition.

Complete propane elimination: 17-year propane furnace, 17-year central AC, and 15-year propane water heater all decommissioned with proper procedures. Propane piping capped at all previous connection points.

Aboveground Propane Tank Decommissioning

Aboveground propane tank decommissioning through licensed propane contractor coordinated by Kathleen Brennan. 500-gallon aboveground tank pickup and removal $1,800 scope (aboveground substantially simpler and less expensive than underground scope described in Western Dracut Pelham NH border case study and Beaver Lake Pelham NH case study). Propane supplier account closure coordinated through the licensed propane contractor.

Outcome

Installation completed over 5 days for HVAC scope plus 1 additional day for propane tank decommissioning. Post-installation first-year operational verification: heat pump and heat pump water heater both operated reliably. T.M. reported strong satisfaction with the complete propane elimination and coordinated modern HVAC scope.

Ongoing Operating Cost Change

Post-installation first-year utility monitoring: total electric operating cost approximately $1,660 for combined heating, cooling, and water heating. Previous year utility costs: propane heating approximately $1,880 (17-year furnace), propane water heating approximately $580, electric cooling approximately $540, combined approximately $3,000/year. Annual operating cost reduction approximately $1,340/year — substantial reduction reflecting complete propane elimination benefits including the coordinated heat pump water heater scope.

Investment Summary (Corrected for Coordinated Scope)

• Heat pump installation cost: $23,800 (Bosch IDS 2.0 4-ton equipment, installation labor, ductwork improvements)
• Rheem ProTerra heat pump water heater installation: $2,800 (equipment plus installation labor)
• Aboveground propane tank decommissioning: $1,800 (licensed propane contractor pickup and removal)
• Corrected combined total installation cost: $28,400
• NH Saves heat pump rebate: $2,000
• NH Saves heat pump water heater rebate: $800 (typical NH Saves heat pump water heater scope)
• Combined NH Saves rebate: $2,800
• IRA 25C federal tax credit: $2,000 (heat pump); additional credit for heat pump water heater approximately $600 (25C also covers heat pump water heaters)
• Combined federal credits: approximately $2,600
• Corrected net investment: approximately $23,000 after combined rebates and credits
• Annual operating cost reduction: approximately $1,340/year
• Additional value: complete propane elimination on the property; no ongoing propane delivery scheduling, tank service, or propane price volatility exposure; 5-year Bosch parts + 10-year compressor warranty on heat pump; 10-year Rheem tank + parts warranty on heat pump water heater

Frequently Asked Questions About This Case Study

Can Rivic complete similar coordinated heat pump + heat pump water heater installations for complete propane elimination on my Pelham NH or other rural NH property?

Yes for properties with suitable configuration. Prerequisites: adequate Eversource NH electric service (typical 200A minimum accommodating both heat pump and heat pump water heater installation with capacity margin; some properties may require electric service upgrade for both installations), existing ductwork suitable for heat pump conversion or property configuration supporting multi-zone ductless configuration, basement or mechanical space suitable for heat pump water heater installation (heat pump water heaters extract heat from ambient air requiring adequate air volume; basement configuration typically ideal), propane tank scope suitable for complete decommissioning (aboveground pickup and removal or underground removal / in-place decommissioning), and property owner ready to eliminate propane entirely in single installation cycle. Rivic handles coordinated installation project management including combined NH Saves rebate coordination for heat pump + heat pump water heater scope. Typical installation range for coordinated complete propane elimination installations: $26,000-$44,000+ gross depending on equipment tiers, tank scope, and installation configuration.

How does complete propane elimination in single installation differ from partial retention with future coordinated replacement?

Two approaches are viable depending on property owner priorities and equipment condition: (A) Complete propane elimination in single installation cycle (T.M.’s approach) — larger initial investment but eliminates propane service entirely with single coordinated scope; combined NH Saves rebate scope larger than single-scope; requires water heater at appropriate end-of-life range for coordinated replacement. (B) Partial propane retention with future coordinated replacement (see rural Salem NH case study for example) — lower initial investment with reduced immediate scope; future coordinated water heater replacement completes propane elimination at that time; requires continued reduced-demand propane service until future replacement. Property owners with newer or mid-life water heaters typically favor approach B; property owners with older water heaters approaching end-of-life typically favor approach A for coordinated efficiency. Rivic’s diagnostic assessment includes water heater condition evaluation as part of initial project planning to help property owners select the appropriate approach.

How does the heat pump water heater actually work? Do I need to worry about basement temperature impact?

Heat pump water heaters extract heat from ambient air (basement space) to heat water in the tank — approximately 3.5-4.0 times more efficient than standard electric or propane water heaters. Ambient air cooling: heat pump water heater operation removes approximately 500-1,500 BTU/hr from surrounding space depending on operating mode and hot water demand. In basement spaces with typical air volume (1,000+ cubic feet minimum recommended), the cooling effect is generally modest and beneficial in warmer months (reduces basement humidity) or minimally noticeable in cooler months. In smaller enclosed mechanical closets, dedicated ducting to draw air from larger adjacent spaces may be needed. Some heat pump water heater configurations offer hybrid electric resistance backup for high-demand periods when heat pump operation alone doesn’t meet demand. T.M.’s Rheem ProTerra 80-gallon in typical basement configuration operates efficiently without special ducting.

How does Pelham NH’s substantial propane retention compare to other Rivic service area propane properties?

Pelham NH has the highest propane retention concentration in Rivic’s service area at approximately 50-70% of properties. Rural Salem NH follows at approximately 15-25% of properties in the more rural portions of the town. Western Dracut border areas (adjacent to Pelham NH) have propane retention affecting approximately 15-25% of western Dracut properties. Rural northern Haverhill has propane retention affecting perhaps 10-20% of properties. Andover, Lawrence, Methuen, and North Andover have relatively minor propane retention (typically less than 5-10% of properties) given more developed natural gas distribution infrastructure. Rivic’s propane conversion scope is comparable across all service areas — same equipment specification approaches, same licensed propane contractor coordination, same rebate framework (though NH Saves smaller than Mass Save as discussed in various NH case studies). See also Western Dracut Pelham border case study, Beaver Lake Pelham NH case study, rural northern Haverhill case study, and rural Salem NH case study for related propane conversion examples across the different service area contexts.

What’s the typical cost range for Route 38 corridor Pelham NH or other rural Pelham NH residential heat pump installations?

Typical range: $20,000-$40,000+ depending on equipment tier, tank scope, and installation configuration including whether coordinated heat pump water heater replacement is included. This case study’s $28,400 corrected combined total reflects mid-tier Bosch IDS 2.0 4-ton heat pump + Rheem ProTerra 80-gallon heat pump water heater + aboveground tank decommissioning for coordinated complete propane elimination scope. Simpler installations (heat pump only with partial propane retention like the rural Salem NH case study approach) typically cost $20,000-$28,000; more complex installations (premium equipment tier, underground tank complete removal, larger property scope) can cost $34,000-$52,000+. Combined NH Saves rebate scope for coordinated heat pump + heat pump water heater installation approximately $2,800-$3,500 typical; IRA 25C combined credits approximately $2,600 typical for coordinated scope.

Contact Rivic Heating and Air Conditioning — Route 38 Corridor Pelham NH Propane Conversion

Route 38 corridor and other Pelham NH rural residential HVAC service including complete or partial propane-to-heat-pump conversion, coordinated heat pump water heater replacement for complete propane elimination scope, licensed propane contractor coordination for aboveground and underground propane tank decommissioning, NH regulatory framework coordination (NFPA 54 base with NH-specific amendments), combined NH Saves rebate coordination for heat pump + heat pump water heater installations, IRA 25C federal tax credit coordination for combined qualifying scope, and manufacturer warranty administration all route through our 225 Broadway #306 office in downtown Methuen. This case study represents a specific installation completed for T.M.; individual property assessments determine equipment specification and installation scope.

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