Bosch Geothermal Heat Pumps

Bosch is one of several active manufacturers of residential ground source heat pump (GSHP) systems available in the United States in 2026. The company is owned by the Bosch Home Comfort Group, a division of Robert Bosch GmbH, and sells residential geothermal equipment through independent HVAC contractors. This page summarizes the current Bosch residential geothermal product lineup, the late-2024 refrigerant transition that reshaped the catalog, recent corporate developments, and how Bosch fits relative to other GSHP brands. It is one input among many for homeowners comparing equipment options; we do not endorse any specific manufacturer.

2026 Product Status

Bosch residential geothermal is active in the US market in 2026, with the legacy R-410A line retired and replaced by R-454B equivalents. A common misconception in older trade press and consumer forums is that "Bosch exited residential geothermal" — that statement is inaccurate. What actually happened is a refrigerant transition: most legacy R-410A models (Greensource CDi/Si/i, FHP TA, Geo 1000) ended production on December 31, 2024, and the same model names continued under Bosch with R-454B refrigerant effective January 1, 2025. The 2024 EPA rules under the AIM Act drove the industry-wide R-454B transition, not a Bosch market exit. Manufacturer documentation for both the active line and discontinued models remains available on the Bosch Home Comfort residential water-to-air heat pump catalog.

In August 2025, Bosch closed an $8 billion acquisition of the Johnson Controls–Hitachi residential and light commercial HVAC business, expanding the Bosch Home Comfort Group from 17 to 33 manufacturing plants worldwide and adding the JCI–Hitachi product portfolio alongside the existing Bosch lineup (Sullivan & Cromwell deal disclosure). For homeowners, the practical effect is broader Bosch parts and service depth in 2026 rather than any narrowing of residential GSHP availability. Buyers should confirm current refrigerant version and delivery lead time directly with the local installing dealer at quote time.

Current Bosch Residential GSHP Product Lines

Bosch's residential ground source heat pump catalog as of 2026 covers multiple cabinet types and capacity ranges. The major active lines are:

• TW Series (R-454B Version) — water-to-water, 2 to 10 ton range, two-stage scroll compressor. Used in radiant-floor and hydronic distribution applications. Marked NEW in the 2026 catalog. TW Series product page.
• RP Series and RP Split (R-454B Version) — water-to-air, 2 to 5 ton, two-stage compressor. Standard ducted forced-air application. RP Split product page.
• RF Series — vertical, horizontal, or counterflow cabinet configurations; ENERGY STAR–rated; single or two-speed compressor depending on model.
• RL Series — compact vertical and horizontal cabinets for tighter mechanical room footprints.
• CA Console (R-454B Version) — a residential console form factor for room-by-room or zoned applications.

The Greensource CDi, Si, and i Series are still listed in some Bosch documentation but are R-410A legacy lines whose production largely ended in December 2024. Bosch maintains a dedicated discontinued geothermal heat pumps documentation page with installation manuals, spare parts diagrams, and spec sheets for retired models, plus an active Aftermarket Resource Center and Spare Parts Finder for existing-owner support.

FHP (Florida Heat Pump), which Bosch acquired in 2008, is now sold under Bosch Home Comfort branding rather than as a separate company. Some independent service shops still refer to the equipment colloquially as "Bosch-FHP."

R-454B Refrigerant Transition

The R-410A → R-454B transition is an industry-wide change driven by the EPA's AIM Act phasedown of high-GWP hydrofluorocarbon refrigerants. R-454B has a global warming potential roughly 78% lower than R-410A. HVAC equipment manufactured after January 1, 2025 must use a low-GWP refrigerant; Bosch's residential GSHP timing matched the regulatory deadline.

For homeowners, R-454B is a mildly flammable A2L-classified refrigerant. It requires installer training and equipment sized to current ASHRAE Standard 15 charge-limit guidance, but it does not change typical day-to-day operation, ductwork, or homeowner maintenance from the legacy R-410A experience. Existing R-410A Bosch units in the field continue to operate normally; service refrigerant is still available, though long-term R-410A supply will tighten as the AIM Act phasedown proceeds. If you own a pre-2025 Bosch system and the loop and cabinet are healthy, there is no immediate operational reason to replace working equipment for refrigerant reasons alone.

Efficiency Ratings and Performance Context

Bosch publishes ENERGY STAR certifications across multiple R-454B residential models. AHRI ratings vary by model, configuration, and ground loop entering water temperature; consult the AHRI Directory at ahridirectory.org for the certified efficiency numbers for any specific Bosch model and capacity tonnage. Notable 2026 features in the catalog include two-stage scroll compressors on the TW Series, modular vertical/horizontal/counterflow cabinet options on the RF Series, and a Whisper-Quiet variant on the legacy i Series.

For energy savings expectations against a conventional system, the EPA reports that ground source heat pumps deliver 30 to 70 percent savings on heating costs and 20 to 50 percent on cooling costs versus conventional HVAC, with the actual figure depending heavily on climate zone and the displaced fuel (DOE Energy Saver geothermal overview). Households replacing oil heat or electric resistance see savings on the high end of that range; homes replacing a modern 95 percent efficient gas furnace generally see lower savings on a fuel-cost basis, with the value coming primarily from cooling efficiency and emissions reduction. A 2025 utility-fleet study of 1,000+ residential heat pumps found GSHPs missed expected efficiency on only 2 percent of units, compared to 17 percent for air source heat pumps, suggesting the modeled performance is more reliable in real installations.

2026 Pricing Context

Installed Bosch residential GSHP pricing follows the broader US geothermal market. The 2026 national average for a complete 3-ton residential ground source heat pump installation is roughly $25,500, with a typical range of $20,000 to $27,000 for standard soil and $35,000 to $50,000 or more in granite or New England terrain (DOE EERE guidance ranges aligned with industry estimates). The per-ton 2026 average is approximately $8,500 (range $4,500 to $12,500 or more, depending on loop type and site complexity).

Drilling typically accounts for 50 to 70 percent of total project cost in vertical closed-loop installations. Geothermal installation costs have risen above 4 percent year over year for three consecutive years, with specialized labor wages as the primary driver per RSMeans data.

For a Bosch system specifically, the equipment portion is one input alongside loop design, drilling depth, regional contractor labor rates, ductwork modifications, and any auxiliary heating integration. See our geothermal installation cost page for a detailed walkthrough by line item.

Federal and State Incentives in 2026

The federal residential incentive picture changed materially in 2025. The §25D Residential Clean Energy Credit, which previously offered 30 percent of installed cost through 2032 under the Inflation Reduction Act, was terminated for new residential geothermal expenditures completed after December 31, 2025 by the One Big Beautiful Bill Act, P.L. 119-21, signed July 4, 2025 (P.L. 119-21 text). Per IRS guidance, "expenditure made" means installation completed — not contract or deposit. Carryforward of unused 2025 credits via IRS Form 5695 still works for homeowners who completed installation by year-end 2025.

For 2026 residential installs, the §25D credit is no longer available. The §48 Commercial Investment Tax Credit for geothermal remains active through 2034 (6 percent base, up to 30 percent with domestic-content, prevailing-wage, energy-community, and apprenticeship bonuses; phasing down to 5.2 percent in 2033 and 4.4 percent in 2034). Third-party-owned (TPO) leases are gaining traction in 2026 because the corporate lessor can claim §48 and pass savings through to homeowners via reduced lease payments.

State and utility incentives are now the primary residential financial path:

• New York — $10,000 cap (raised from $5,000 effective July 1, 2025 per S4882; NY Tax Law §606(g-4)). 25 percent of installed cost on a primary residence.
• Massachusetts — Mass Save offers a $13,500 whole-home GSHP rebate in 2026 (down from $15,000 in 2025); $25,000 income-qualified at or below 60 percent State Median Income. The Mass Save HEAT Loan is separately available 0 percent APR financing.
• Connecticut — Smart-E Heat Pump Special at 0.99 percent APR through June 30, 2026 (this is a financing rate, not a rebate).
• HEEHRA / HEAR §50122 — up to $8,000 for heat pump installs (including GSHP) for households below 150 percent of Area Median Income; rollout varies by state.
• Fannie Mae HomeStyle Refresh — effective March 31, 2026 (SFC 892), the modern primary GSE financing path for energy + cosmetic + resiliency improvements up to 15 percent of future home value.

See geothermal rebates by state and the geothermal tax credit calculator for jurisdiction-specific figures.

Payback and Home Value

Realistic payback for a residential GSHP, per DOE/EERE modeling and peer-reviewed analyses, runs 5 to 10 years overall, with about a 7.5-year median when replacing an air source heat pump and 9.2-year median when replacing a gas furnace plus AC. Without the §25D credit for 2026 and later installs, the unincentivized payback range stretches to 10 to 15 years; with state and utility rebates, expect 7 to 12 years depending on jurisdiction. Equipment lifespan is typically 20 to 25 years for the indoor heat pump and 50+ years for the ground loop, so most systems pay back well inside their useful life.

Home value impact, per NAHB and Lawrence Berkeley National Laboratory data, is typically $8,700 to $15,000 for a residential GSHP. Higher figures up to $20,000 are documented in luxury markets and oil-displacement scenarios but are not typical for the median residence. Modeled IRR over a 25-year horizon is 6 to 8 percent for a baseline residential GSHP, climbing to 10 to 12 percent in cold-climate oil-displacement cases.

Advantages and Considerations Specific to Bosch

• Broad cabinet catalog — TW, RP, RL, CA, and RF cover water-to-water, water-to-air ducted, split, console, and modular vertical/horizontal/counterflow configurations. Useful when retrofit constraints rule out a packaged unit.
• Recent R-454B transition — the entire active line ships with the current low-GWP refrigerant, aligning with EPA AIM Act requirements and reducing future regulatory risk to the equipment.
• Existing-owner support — the Discontinued Geothermal page on bosch-homecomfort.com plus active Aftermarket and Spare Parts Finder mean documentation, parts, and service guidance are available for legacy Greensource, FHP, and i Series units.
• Corporate scale — post-JCI–Hitachi acquisition (closed August 2025), Bosch Home Comfort operates 33 manufacturing plants. This is depth, not a guarantee of any specific dealer's quality.
• Site-specific installation — like all GSHPs, soil composition, available land, drilling access, and existing distribution determine feasibility and cost. Get a full Manual J and Manual S load and equipment selection from the installer; do not size from rules of thumb.
• Refrigerant handling — A2L refrigerants like R-454B require installers trained on current handling and leak-detection guidance. Verify the contractor has completed R-454B certification before signing.

How Bosch Compares to Other Brands

Bosch is one of several active US residential GSHP manufacturers. Competitors include WaterFurnace (NIBE-owned, market leader, full R-454B lineup including the 7 Series 700A11 at 47.0 EER and the 5 Series 3D combo unit launched April 3, 2025), ClimateMaster (Trilogy 45 variable-capacity series, first GSHP AHRI-certified above 45 EER; Tranquility line transitioning to R-454B), Trane (EnviroWise TVGX flagship; R-454B status for residential GSHP unconfirmed as of the spring 2026 catalog), and Carrier (modernized residential GSHP relaunched June 11, 2025 with R-454B Puron Advance and InteliSense diagnostics). Each brand has different strengths in cabinet form factors, controls, communicating thermostats, and dealer footprint. Pricing varies less by brand than by loop type, regional labor, and dealer markup.

For brand-by-brand context, see WaterFurnace geothermal systems, ClimateMaster geothermal systems, and all geothermal brands. For system-type selection, our geothermal vs air source heat pump guide and geothermal heat pump guide walk through the tradeoffs.

Installation and Maintenance

Proper installation by IGSHPA-certified contractors is the single largest determinant of long-term Bosch system performance. Loop sizing errors, undersized header pipes, and incorrect glycol mix concentration cause more field problems than any equipment defect. Bosch dealer agreements typically require manufacturer-specific commissioning training in addition to IGSHPA accreditation.

Annual geothermal maintenance for a Bosch unit covers refrigerant pressure verification, ground loop pressure and flow checks, electrical inspections, condensate drain clearance, and air filter replacement. Use our find a geothermal contractor directory to locate qualified installers in your service area.

Frequently Asked Questions

Did Bosch exit the US residential geothermal market?

No. Bosch retired its R-410A FHP and Greensource lines on December 31, 2024, and continues residential GSHP production under the same TW, RP, RL, CA, and RF model names with R-454B refrigerant from January 1, 2025 forward. The flat statement "Bosch exited residential geothermal" mischaracterizes a refrigerant transition as a market exit.

What refrigerant does my Bosch geothermal system use?

Bosch units shipped before January 1, 2025 use R-410A. Bosch units manufactured from January 1, 2025 onward use R-454B. The model name alone does not indicate refrigerant version — check the unit data plate or the dealer's order paperwork.

Is the federal 30 percent geothermal tax credit still available?

For new residential installs in 2026 and later, no. The §25D Residential Clean Energy Credit was terminated for residential geothermal expenditures completed after December 31, 2025 by the One Big Beautiful Bill Act, P.L. 119-21. Carryforward of unused 2025 credit amounts via IRS Form 5695 still works. The §48 commercial credit remains active through 2034 and is increasingly used for third-party-owned residential leases.

What is the typical lifespan of a Bosch geothermal heat pump?

The indoor unit typically lasts 20 to 25 years; the ground loop typically lasts 50+ years. Maintenance discipline matters more than brand for long-term reliability.

Can a Bosch geothermal system work in cold climates?

Yes. Ground source systems generally outperform air source heat pumps in cold climates because subsurface temperatures stay between roughly 45 and 75 °F year round, depending on geographic latitude and drilling depth, eliminating the outdoor-temperature efficiency penalty that air source units face.

What ground loop size do I need?

Use our geothermal loop calculator for a preliminary estimate; final sizing requires a Manual J load calculation and site-specific soil and groundwater analysis from a qualified driller.

Are spare parts available for older Bosch and FHP units?

Yes. Bosch maintains a Discontinued Geothermal Heat Pumps page with installation manuals and spec sheets, plus an active Aftermarket Resource Center and Spare Parts Finder. Independent specialty shops also carry archival FHP/Bosch-FHP parts inventories.

Next Steps

To evaluate whether a Bosch residential geothermal system fits your home, start with our ground source heat pump overview and the pros and cons of geothermal reference. Then connect with multiple IGSHPA-certified installers — at least three quotes is reasonable — to compare equipment selection, loop design, and total installed cost across Bosch and competing brands.