Nearly 7,000 NTI and HTP gas boilers recalled over fire and carbon monoxide risk

Federal regulators and the boilers' manufacturer are telling thousands of households and the contractors who service their heating systems to stop using certain NTI and HTP brand gas boilers immediately, after reports that an internal part can crack and allow unburned gas to collect inside the unit's sealed cabinet.

The U.S. Consumer Product Safety Commission announced the recall on October 29, covering residential boilers sold under the NTI and HTP brand names and manufactured by Ariston Canada Inc., formerly known as NTI Boilers Inc. The commission says the defect involves the condensate dish inside the boiler, which "can crack during a delayed ignition," allowing unburned gas to build up inside the sealed cabinet. If that gas ignites, the front cover can suddenly detach.

A defect inside the cabinet

The hazard notice is blunt about what can follow. According to the commission, the defect poses "a risk of serious injury or death from fire, carbon monoxide (CO) poisoning, and impact hazards" if the gas ignites and the cover separates from the unit.

"The condensate dish inside the boiler can crack during a delayed ignition, allowing unburned gas to build up inside the sealed cabinet. If the gas ignites, the front cover can suddenly detach, posing a risk of serious injury or death from fire, carbon monoxide (CO) poisoning, and impact hazards."

Ariston has logged 34 reports of the condensate dish breaking so far, including three incidents in which the front cover actually detached from the boiler. One of those incidents caused an injury: a technician servicing a boiler suffered a broken jaw, according to the recall notice and reporting from HPAC Magazine, a trade publication covering the heating and plumbing industry.

The numbers behind the recall

The recall covers about 4,726 boilers sold in the United States and another 2,261 units sold in Canada, for a combined total of nearly 7,000 across both countries. The affected models are the gray NTI boilers in the FTVN and TFTN series and the black HTP boilers in the EFTU, or Elite Fire Tube Ultra, series. Both brands are printed on the front of the metal, rectangular units, with a serial number listed on a rating plate on the left-hand side.

The boilers were sold nationwide through independent heating and plumbing contractors and wholesale distributors, rather than directly to consumers, from May 2021 through July 2026. They retailed for between $3,200 and $7,700, reflecting the fact that these are whole-house heating appliances typically installed by a licensed technician rather than a do-it-yourself purchase.

A heating system with a recall history

This is not the first safety action involving these brands. In June 2025, the commission recalled a different set of NTI and HTP wall-mounted boilers after finding that incorrectly manufactured burner door studs could keep the boiler door from sealing properly, which also created fire and carbon-monoxide risks. Ariston separately issued a safety notice earlier in 2026 covering its FTG series over a related ignition problem. The current recall, covering the FTVN, TFTN and EFTU series, is a distinct defect tied specifically to the condensate dish.

The timing lands as colder weather pushes boilers into heavier daily use across much of the country. The Centers for Disease Control and Prevention recommends having heating systems, water heaters and other gas, oil or coal-burning appliances serviced annually by a qualified technician, and keeping working carbon monoxide alarms installed near sleeping areas, as baseline protection regardless of any single product recall.

Who needs to check their boiler

Homeowners who had a boiler installed by a contractor in the affected date range, and who are unsure of the brand, are advised to look at the unit itself rather than paperwork alone. The commission's notice lists specific serial-number ranges for each of the ten affected model numbers, spanning both NTI's FTVN150, FTVN150C, FTVN199, FTVN199C, TFTN150 and TFTN199 models and HTP's EFTU-150WBN, EFTU-150WCN, EFTU-199WBN and EFTU-199WCN models. Because the hazard depends on manufacturing date rather than brand name alone, a boiler with a matching model number is not automatically included unless its serial number falls within the listed ranges.

Reporting from Yahoo News, citing the original CPSC notice, noted that neither the U.S. nor Canadian recall offers a refund or a replacement unit; the only remedy on offer is a repair.

What to do now

The commission's instructions are straightforward: consumers should stop using the recalled boilers immediately and contact Ariston to schedule a free repair by a certified technician. Anyone who must keep a boiler running while waiting for that repair is advised to make sure working smoke and carbon monoxide alarms are installed and functioning in the home.

Ariston has set up a dedicated recall line, 800-688-2575, staffed from 7 a.m. to 8 p.m. ET on weekdays, along with an email address, [email protected]. The company's own safety-recalls page lists the FTVN/TFTN notice alongside several other active NTI and HTP safety actions, instructing owners to have a repair kit installed "as soon as possible." HTP maintains a parallel notice on its own site. Contractors are being asked to check whether any of their customers' installed units fall within the affected serial-number ranges and to contact their wholesale distributor for a no-charge repair kit rather than billing the homeowner.

The commission has not said how long the repair program is expected to take to reach all affected households, and it continues to accept incident reports tied to the recall through its consumer hotline.