Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
Boilers.ca is a brand of ROMA Heating & Cooling · Licensed gas contractor LGA0202903
NTI Boilers · Series
The Green Furnace line merges an NTI condensing combi boiler with a high-efficiency air handler for forced-air heating, hydronic heating and domestic hot water in one cabinet: the GF200 at 19,900-199,000 BTU/hr DHW input and 97% AFUE, and the GF150 at 13,200-150,000 BTU/hr DHW input and 95% AFUE.
Series facts
The Green Furnace is NTI's all-in-one combi-furnace: a condensing boiler section paired with an ECM air handler that provides forced-air heating, hydronic heating and domestic hot water from a single unit. The GF200 submittal prints space-heating input of 19,900-80,000 BTU/hr and DHW input of 19,900-199,000 BTU/hr with 97% AFUE, a 0.97 energy factor on domestic water and flow rates from 7.8 gpm at a 50°F rise down to 4.8 gpm at an 80°F rise; the GF150 spec table prints 13,200-120,000 BTU/hr space heating, 13,200-150,000 BTU/hr DHW, 95% AFUE and 3.6 gpm at a 77°F rise.
Both models include internal recirculation and a buffer tank to eliminate the cold-water sandwich, stainless steel heat exchangers, a built-in condensate trap and a built-in DHW flow switch with a serviceable filter. The GF200 ships at 248 lb in a 17.75" x 38" x 38" cabinet with 2" or 3" venting; the GF150 adds cooling capability up to 3 tons with 300-1200 CFM heating airflow and 360-1200 CFM cooling airflow. Both are field-convertible to LP gas, and the GF200 submittal notes its AFUE is based on NTI lab testing sent to AHRI.
Highlights
Models
One canonical page per model with input, output and efficiency kept separate.
NTI Boilers
The NTI GF 200 is a combi-furnace with 19,900-80,000 BTU/hr space-heating input, 19,900-199,000 BTU/hr DHW input, 97% AFUE and a 0.97 DHW energy factor, delivering up to 7.8 gpm at a 50°F rise from an internal recirculation and buffer tank.
NTI Boilers
The NTI GF150 is a combi-furnace with 13,200-120,000 BTU/hr space-heating capacity, 13,200-150,000 BTU/hr DHW capacity, 95% AFUE, up to 3 tons of cooling and 3.6 gpm of domestic hot water at a 77°F rise.
| Specification | NTI GF 200 | NTI GF150 |
|---|---|---|
| Space heating input, minimum | 19.9 MBH | 13.2 MBH |
| Space heating input, maximum | 80 MBH | 80 MBH |
| output-max | — | — |
| Efficiency (AFUE) | 97 % | 95 % |
| turndown | — | — |
| vent-max-3 | — | — |
| vent-max-2 | — | — |
| Weight | 248 lb | — |
Error codes and alerts
No alerts documented for this series yet.
Manuals
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Services for NTI Boilers boilers
It is NTI's all-in-one unit that merges a condensing combi boiler with an ECM air handler, providing forced-air heating, hydronic heating and domestic hot water from one appliance rather than a separate furnace and water heater.
Capacity: the GF200 spans 19,900-199,000 BTU/hr DHW input at 97% AFUE, while the GF150 spans 13,200-150,000 BTU/hr DHW input at 95% AFUE with up to 3 tons of cooling and 360-1200 CFM cooling airflow.
Yes. The GF200 submittal states it is field convertible to LP gas, and the GF150 spec table prints LP gas pressures of 8-13" W.C. against 3.5-10.5" W.C. for natural gas.
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.