Field reports
What owners and installers actually report
Buying this equipment currently means spending several evenings across Reddit, YouTube, Amazon and trade forums, assembling a picture nobody has written down. This is that picture, categorised and linked back to every original.
Where the spec sheet and owners disagree
The most useful thing in this whole database. A published specification is measured under controlled conditions; your installation is not controlled conditions. When several people independently report a figure that contradicts the datasheet, that gap is worth knowing before you buy, not after.
Daikin Fit Aurora DH9VS
The datasheet gives Capacity retained at 5°F as 75%. An owner reports measuring 100% in real installations — roughly 33% higher. We publish both figures and let you judge; the specification is not wrong so much as measured under conditions your installation will not reproduce.
| Manufacturer specification | 75 |
| Reported by owners | 100% |
| Divergence | 33% |
Rheem ProTerra Hybrid Heat Pump Water Heater, 50 gal
The datasheet gives Sound level as 49dB(A). An owner reports measuring 68dB(A) in real installations — roughly 39% higher. We publish both figures and let you judge; the specification is not wrong so much as measured under conditions your installation will not reproduce.
| Manufacturer specification | 49 |
| Reported by owners | 68dB(A) |
| Divergence | 39% |
Rheem ProTerra Hybrid Heat Pump Water Heater, 80 gal
The datasheet gives Sound level as 49dB(A). An owner reports measuring 70dB(A) in real installations — roughly 43% higher. We publish both figures and let you judge; the specification is not wrong so much as measured under conditions your installation will not reproduce.
| Manufacturer specification | 49 |
| Reported by owners | 70dB(A) |
| Divergence | 43% |
By product
Ordered by how serious the most severe reported issue is. Thin evidence is labelled as thin rather than dressed up as consensus.
Lochinvar Knight Fire Tube Condensing Boiler
Recalls and safety notices
CPSC recalled roughly 34,300 US units (plus 3,642 in Canada) across multiple Lochinvar/A.O. Smith/State Proline condensing boiler lines sold under...
(1 report)
Reliability and failures
An owner of a Lochinvar Knight KBN-399 (a larger, different capacity variant in the same Knight product family as this catalog's KHB110N — not a...
(1 report)
Daikin Fit Aurora DH9VS
Recalls and safety notices
The U.S. CPSC issued a 2024 recall of Daikin FIT, Amana S-series and Goodman SD heat pumps for a risk of excessive heat exposure (overheating)....
(1 report)
Cold-weather performance
An owner reported their Daikin Fit shut down around -18°C despite literature advertising operation well below that — a gap between the rated...
(2 reports)
Controls and compatibility
A satisfied owner praised the variable-speed comfort but criticised the proprietary thermostat's clunky menu structure.
(1 report)
Defrost behaviour
A named owner (exact install: DH9VSA2410 condenser, MBVK16CH1X00 air handler, 15kW heat strips; installed Minnesota, Dec 2025) reports the unit...
(1 report)
A. O. Smith ProLine XE Voltex AL (HPTS-66) Heat Pump Water Heater, 66 gal
Reliability and failures
Owner reports replacing an A.O. Smith hybrid water heater three times in roughly two years for a recurring ECC (compressor) fault code. Warranty...
(3 reports)
Parts and service availability
Trade view is that local service coverage matters more than the efficiency difference between these two brands. Both are competent products; the...
(1 report, 1 from trade)
Warranty and manufacturer support
Specific trade warning to read water heater warranties closely and avoid pro-rated terms, which reduce in value over the life of the unit rather...
(1 report, 1 from trade)
Rheem ProTerra Hybrid Heat Pump Water Heater, 80 gal
Noise in real installations
Multiple owners report Gen 5 ProTerra units running at 68–72 dB — far above the quoted figure and far above the ~49 dB owners report from Gen 4...
(1 report)
Reliability and failures
A CPSC SaferProducts.gov incident report (#20251206-2B6CA-2147325844, filed Jan 13 2026) describes an electrical short with popping sounds and a...
(4 reports)
Warranty and manufacturer support
Warranty replacement did not resolve the noise complaint — the replacement units exhibited the same behaviour, and service technicians classified...
(1 report)
Running cost as experienced
An off-grid owner reports that an 80-gallon Rheem hybrid used for a year draws very little power in heat-pump operation.
(1 report)
SANCO2 CO2 Heat Pump Water Heater, 83 gal split system
Reliability and failures
Two upper-Midwest project installations reportedly froze after heat-tape failures; one outdoor unit required complete replacement.
(1 report, 4 from trade)
Cold-weather performance
Rated to operate to -25°F, but early units had freezing problems in the outdoor compressor loop; the maker retrofitted heat-tape insulation and...
(2 reports, 1 from trade)
Running cost as experienced
An owner who replaced a leaking Stiebel Eltron with a SANCO2 reports at least a 20% efficiency improvement and lower noise after one year.
(2 reports, 1 from trade)
Controls and compatibility
A 17-month owner of a Sanden (SANCO2) heat pump water heater reported that after a multi-hour utility power outage, the unit failed to...
(1 report)
Noise in real installations
Because the compressor sits outdoors (split system), owners report no indoor noise or cold-air dumping — the complaint that dogs standard...
(1 report, 1 from trade)
Navien NFC-175 Condensing Combi Boiler
Reliability and failures
Trade sentiment on Navien is markedly worse than the specification sheet suggests. Several working hydronics contractors reject the brand outright...
(1 report, 1 from trade)
Parts and service availability
Contractors report a strong preference for competing brands, which in practice affects who is willing to service the equipment later.
(1 report, 1 from trade)
Controls and compatibility
A dissenting view from a 30-year hydronics contractor: several Navien units in service without problems, and the fire tube control interface and...
(1 report, 1 from trade)
Viessmann Vitodens 100-W Condensing Boiler
Parts and service availability
An owner of a Viessmann Vitodens 100-W propane combi boiler reported that the radial fan's air intake port (NRG118) repeatedly deteriorates to the...
(1 report)
Goodman GLXS4BA3010 Air Conditioner
Reliability and failures
Brand-level signal, not a match to this specific model: an owner reported two Goodman condensers dead on arrival with no refrigerant charge and...
(1 report)
Goodman GSXC180241 Air Conditioner
Reliability and failures
Brand-level signal, not a match to this specific model: an owner reported replacing the compressor twice on a 3-ton Goodman unit and once on a...
(2 reports, 1 from trade)
Goodman GSXC180481 Air Conditioner
Reliability and failures
Brand-level signal, not a match to this specific model: an owner reported replacing the compressor twice on a 3-ton Goodman unit and once on a...
(2 reports, 1 from trade)
Rheem RA13NY24AJ1NA Air Conditioner
Reliability and failures
Category-wide finding, not specific to this product: a builder-grade condenser developed a refrigerant leak from cracking copper coils after 7...
(2 reports)
Carrier Infinity 98 Gas Furnace (59MN7)
Controls and compatibility
Carrier's own installation manual, quoted directly in this thread, confirms the Infinity communicating platform is a hard lock-in: on a standard...
(2 reports)
Carrier Infinity 24 Heat Pump with Greenspeed Intelligence (25VNA4)
Controls and compatibility
Carrier's communicating architecture only delivers full staging when paired with matching Carrier equipment. Owners pairing an Infinity unit with...
(1 report)
Parts and service availability
Parts availability is the recurring complaint against Carrier Infinity from the service side. On a communicating variable-speed system this...
(1 report)
Trane 19 Multi-Speed Low Profile Cold Climate Heat Pump
Reliability and failures
Brand-level Trane reviews include early hardware failures — an owner reported a coil that leaked out all refrigerant at about 18 months, and...
(1 report)
Cold-weather performance
A Trane owner (model tier not specified) reported strong supply temperatures of 95–103°F at 16°F outdoor without electric strips engaging.
(1 report)
Daikin Aurora Multi-Zone Ductless System
Cold-weather performance
The same multi-zone turndown limitation applies across brands, not just Mitsubishi — this is an architectural property of running several indoor...
(1 report, 1 from trade)
Mitsubishi FX Deluxe Single-Zone Hyper-Heating (MUZ-FX)
Controls and compatibility
Mitsubishi's warranty term is tiered by who installs and registers the system: a Diamond Contractor install registered through the official portal...
(2 reports, 1 from trade)
Defrost behaviour
Below about 36°F, affected units entered defrost roughly every 15 minutes with 10-minute cycles — leaving only five minutes in four of actual...
(1 report)
Noise in real installations
Owners who received the firmware fix report the noise resolved entirely, which is a useful signal that the complaint was a defect rather than...
(1 report)
Reliability and failures
Long-run owner reports are consistently positive on Mitsubishi ductless — multiple units over five-plus years with no failures.
(1 report)
A. O. Smith ProLine XE Voltex AL (HPTS-80) Heat Pump Water Heater, 80 gal
Reliability and failures
Same platform, second owner: reports a second replacement unit, still under two years old, already showing the recurring ECC error code, and...
(2 reports)
Bradford White AeroTherm Series G2 Heat Pump Water Heater, 50 gal
Reliability and failures
Two years after installing a Bradford White AeroTherm 50-gallon HPWH, the owner had the lower electric heating element replaced (confirmed...
(3 reports)
Running cost as experienced
A HeatingHelp: The Wall poster reported paying $450 (after a Minnesota efficiency rebate) for an 80-gallon Bradford White AeroTherm HPWH that...
(1 report)
Bradford White AeroTherm Series G2 Heat Pump Water Heater, 80 gal
Reliability and failures
Two years after installing a Bradford White AeroTherm 50-gallon HPWH, the owner had the lower electric heating element replaced (confirmed...
(3 reports)
Running cost as experienced
A HeatingHelp: The Wall poster reported paying $450 (after a Minnesota efficiency rebate) for an 80-gallon Bradford White AeroTherm HPWH that...
(1 report)
Navien NPE-240A2 Condensing Tankless Water Heater
Parts and service availability
A working master plumber reports Navien repair calls are dominated by worn gaskets and O-rings, in contrast to zero comparable repair calls he's...
(1 report, 1 from trade)
Sizing and capacity in practice
A newly installed Navien NPE-240A2 owner reported a shower running noticeably colder than their old tank heater, worsening further whenever a...
(1 report)
Rheem Marathon MR50245C Electric Water Heater, 50 gal
Reliability and failures
A plumbing-forum commenter, in a thread about whether to buy a Rheem Marathon lifetime-warranty tank, said their own experience with plastic-tank...
(3 reports)
Warranty and manufacturer support
A trade professional notes Rheem Marathon tanks are composite construction with a lifetime warranty, and describes Rheem's 4-year warranty...
(1 report, 1 from trade)
Rheem ProTerra Hybrid Heat Pump Water Heater, 50 gal
Reliability and failures
A CPSC SaferProducts.gov incident report (#20251206-2B6CA-2147325844, filed Jan 13 2026) describes an electrical short with popping sounds and a...
(2 reports)
Noise in real installations
The same generational noise complaint is reported across ProTerra tank sizes, not only the 80-gallon.
(2 reports)
Running cost as experienced
An off-grid owner reports that an 80-gallon Rheem hybrid used for a year draws very little power in heat-pump operation.
(2 reports)
Controls and compatibility
Two independent owners in the same thread report the app-based mode scheduling is unreliable -- one had it silently stop following its schedule,...
(1 report)
Rinnai RX160iN Condensing Tankless Water Heater
Sizing and capacity in practice
Verified purchaser reports the unit faults out under simultaneous heavy draw — a bath plus a shower, or a shower plus the washing machine.
(1 report)
Controls and compatibility
Two separate verified reviewers cite long wait times at the fixture before hot water arrives — a generic tankless/no-recirculation characteristic,...
(1 report)
Warranty and manufacturer support
Verified purchaser reports a fast full-unit warranty replacement.
(1 report)
Grundfos 10SQ10-290 Constant Pressure Submersible Pump
Reliability and failures
Field reports cluster Grundfos VFD electronics failures at years four to six. Because the drive is integrated into the pump body, failure requires...
(1 report, 1 from trade)
Daikin DX5SEA3010A Air Conditioner
Noise in real installations
Category-wide finding, not specific to this product: a newly installed system was reported as dramatically louder than expected, with a forum...
(1 report)
Bosch IDS Ultra Inverter Ducted Split
Cold-weather performance
A Bosch IDS owner set the aux-heat lockout low and found the unit held the house at 68°F in the teens without supplemental heat.
(1 report)
Reliability and failures
An owner framed Bosch as good value but a tier below Mitsubishi inverters, and warned that voltage fluctuations are the main killer of these...
(1 report)
Parts and service availability
Forum members raised concern about spare-parts availability and Bosch's less-established service network versus Mitsubishi and Daikin.
(1 report)
Mitsubishi M-Series SUZ-NLHZ Hyper-Heating
Reliability and failures
A Cape Cod owner of six years said their Mitsubishi splits had been trouble-free apart from routine cleaning.
(1 report)
Cold-weather performance
An owner reported their Hyper-Heat unit, rated to -13°F, still heated well when they deliberately tested it at -5°F.
(2 reports)
Defrost behaviour
The same owner noted the defrost cycle becomes audible below about 35°F, but output at 17°F was adequate for their space.
(1 report)
Noise in real installations
An installer starting a Hyper-Heat unit at 15°F in a room over a garage found it heated well and ran nearly silently.
(1 report)
Fujitsu Halcyon XLTH Extra Low Temperature Heating
Reliability and failures
No direct long-run Fujitsu reliability reports surfaced in this thread despite the question being asked directly. Absence of evidence rather than...
(1 report)
Bradford White Defender RG250T6N Atmospheric Gas Water Heater, 50 gal
Controls and compatibility
Dominant brand-level complaints are binary temperature control (no middle setting between freezing cold and scalding hot) and pilot lights that...
(2 reports)
Reliability and failures
A professional (site is a plumbing-contractor community) reports the thermal-switch/unitrol on a Bradford White Defender tripping prematurely and...
(2 reports, 1 from trade)
Rheem Performance Platinum XG50T12HE40U0 Atmospheric Gas Water Heater, 50 gal
Reliability and failures
A source reports this reliability experience: It has exhibited this problem since it was installed, but for reasons I won't go into, it hasn't...
(1 report)
Rheem Performance RETEX-24 Self-Modulating Electric Tankless Water Heater
Reliability and failures
Owner of the sibling RETEX-18 (same self-modulating electric-tankless platform as the cataloged RETEX-24, different kW rating) reports the unit...
(1 report)
Rheem Performance XE50M06ST45U1 Electric Water Heater, 50 gal
Reliability and failures
Owner's first drain at three years in found the OEM plastic drain valve already plugged, requiring replacement with a brass full-port valve before...
(1 report)
Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater
Controls and compatibility
Owner reports the Tempra 24 Plus's shower temperature swings about 7 degrees and water pressure fluctuates strongly during normal multi-fixture...
(1 report)
Franklin Electric 20FV1S4 Submersible Well Pump
Reliability and failures
Franklin's failure mode is a control box capacitor at years five to eight — above ground, cheap, and repairable with a screwdriver. A worse...
(1 report, 1 from trade)
Franklin Electric FPS 4400 Tri-Seal Submersible Well Pump
Warranty and manufacturer support
Franklin Electric's own official limited-warranty document states coverage of 1 year from date of installation OR 2 years from date of...
(1 report)
Goulds 10GS10412C Submersible Well Pump
Water quality and maintenance
The floating impeller design tolerates sand and silt that abrades fixed-impeller pumps, and the pump can be rebuilt rather than replaced. If your...
(1 report, 1 from trade)
Lennox Merit ML14KC1-018 Air Conditioner
Noise in real installations
Category-wide finding, not specific to this product: a newly installed Lennox system runs audibly louder indoors than the system it replaced — a...
(1 report)
A.Y. McDonald 24100P2 Submersible Well Pump
Warranty and manufacturer support
A.Y. McDonald's own limited warranty document states 5 years from date of manufacture for its 4-inch 1/2-1.5 HP submersible motors in potable...
(1 report)
Where this comes from, and what we're allowed to publish
We synthesise and link. We do not mirror other people's writing — partly because republishing forum and review content is a copyright and terms-of-service problem, and partly because a page that copies its sources adds nothing you couldn't get by reading them. The value we add is the collection, the categorisation, and the judgement about what a thread actually shows.
| Source | Who posts there | What we store |
|---|---|---|
| Fixya Q&A community · html |
homeowners | Link, author, and quotes up to 280 characters |
| Houzz Discussions community · html |
homeowners | Link, author, and quotes up to 200 characters |
| Owner/trade forums (misc.) community · html |
mixed | Link, author, and quotes up to 250 characters |
| Independent Substack essays editorial · html |
homeowners | Link, author, and quotes up to 280 characters |
| HeatingHelp — The Wall expert · html |
trade | Link, author, and quotes up to 300 characters |
| GreenBuildingAdvisor Q&A expert · html |
mixed | Link, author, and quotes up to 300 characters |
| HVAC-Talk expert · html |
trade | Link, author, and quotes up to 300 characters |
| Terry Love Plumbing Forum expert · html |
mixed | Link, author, and quotes up to 300 characters |
| DIY Forums (diy-forums.com) expert · html |
mixed | Link, author, and quotes up to 280 characters |
| Fine Homebuilding Discussion Forum expert · html |
mixed | Link, author, and quotes up to 300 characters |
| Hearth.com Forums expert · html |
mixed | Link, author, and quotes up to 250 characters |
| JustAnswer plumbing Q&A expert · html |
homeowners | Link, author, and quotes up to 200 characters |
| BobIsTheOilGuy Forums expert · html |
mixed | Link, author, and quotes up to 280 characters |
| PlumbingForums.com expert · html |
trade | Link, author, and quotes up to 280 characters |
| InterNACHI Forum expert · html |
trade | Link, author, and quotes up to 280 characters |
| Independent trade-company blogs expert · html |
trade | Link, author, and quotes up to 280 characters |
| plbg.com forum · html |
trade | Link, author, and quotes up to 240 characters |
| U.S. Consumer Product Safety Commission regulatory · html |
homeowners | Link, author, and quotes up to 400 characters |
| CPSC SaferProducts.gov filings regulatory · html |
homeowners | Link, author, and quotes up to 300 characters |
| Amazon retailer · affiliate_api |
homeowners | Rating & link only |
| Home Depot ratings retailer · manual |
homeowners | Rating & link only |
| Lowe's ratings retailer · manual |
homeowners | Link, author, and quotes up to 220 characters |
| SupplyHouse.com ratings retailer · manual |
homeowners | Rating & link only |
| Ferguson ratings retailer · manual |
homeowners | Rating & link only |
| SupplyStop.com ratings retailer · manual |
homeowners | Rating & link only |
| ConsumerAffairs reviews review · html |
homeowners | Link, author, and quotes up to 200 characters |
| Better Business Bureau customer reviews review · html |
homeowners | Link, author, and quotes up to 200 characters |
| Reddit social · oauth_api |
mixed | Link, author, and quotes up to 240 characters |
| YouTube video · public_api |
mixed | Link, author, and quotes up to 200 characters |
On Amazon and retailer ratings specifically
We store no Amazon review text. Amazon's terms prohibit scraping and its Product Advertising API does not return review bodies, so the aggregate star rating and a link to the reviews page is both what is available and what we publish.
That limitation matters less than it sounds. Most residential mechanical equipment isn't sold on Amazon at all — it moves through distribution — and what is sold there collects reviews dominated by shipping damage and installation difficulty rather than the five-year questions that actually decide these purchases. Treat retail star ratings as a sanity check, never as a basis for choosing equipment.
How we weight what we find
Trade forums carry more weight than owner communities, which carry more weight than retail ratings — not because owners are wrong, but because a contractor who services fifty of something sees failure patterns an owner of one cannot. Every report is tagged by whether it came from a homeowner or someone who works on the equipment, and both are shown.
A single report is never presented as a pattern. The evidence strength bar on each theme accounts for how many independent sources agree, and anything below 40% is labelled thin.