Lochinvar – Crest Condensing Commercial Gas Boilers

CREST CONDENSING BOILER

The performance of the CREST boiler has changed the way the industry views fire-tube boilers.

THE FIRST NAME IN EFFICIENCY

CREST boilers are equipped with a top-mounted micro-metal fiber burner, engineered specifically for fire-tube technology. The system is designed to ensure smooth, quiet modulating combustion with up to 25:1 turndown. CREST is designed for efficiency to reduce your customer’s fuel bills.

Reduce Installation Cost with Variable Flow Technology
Installation is streamlined, without the time and materials cost of primary-secondary system/boiler piping.
High Efficiency with Minimum Supply Pressure
CREST operates reliably with supply gas pressure as low as 4 inches water column. Negative regulation (neg/reg) technology draws gas into a pre-mix combustion system instead of relying on utility pressure through the gas valve. Operation is steady in low gas pressure systems or when peak gas supply demand occurs.
Peace of Mind When It Matters Most
Cascade redundancy provides peace of mind because it helps ensure that a CREST boiler system will always deliver reliable performance with no downtime. Cascade sequencing can be programmed for Lead-Lag or Efficiency Optimized operation.
Flexible Venting Options
CREST offers 6 venting options, and it permits direct-vent air intake and exhaust runs up to 100 equivalent feet using PVC, CPVC, polypropylene or stainless steel pipe. Plus, multiple units can be common-vented to reduce time and materials cost.
Superior Fire-Tube Heat Exchanger Design
The patented Wave™ configuration creates turbulence as flue gas products flow down the tube, scrubbing the energy from the flue products. The Wave design enhances the life of the heat exchanger by allowing the tubes to flex so they operate stress free with none of the adverse effects suffered by traditional fire-tube boilers.

Model Number	Input MBH Min.	Input MBH Max.	Thermal Efficiency	Gross Output MBH	Net Rating MBH	Turndown	A	B	C	Gas Conn.	Water Inlet/Outlet	Air Intake	Vent Size	Oper. Wt.	Ship. Wt.
FBN0751	50	750	96.2%	722	628	15:01	78″	30”	55 1⁄2″	1 1⁄4”	3”	6”	6”	1,768	1,560
FBN1001	50	999	96.2%	962	837	20:01	78″	30”	56 1⁄2″	1 1⁄4”	3”	6”	6”	1,838	1,596
FBN1251	63	1,250	96.2%	1,203	1,046	20:01	78″	30”	56 1⁄2″	1 1⁄4”	3”	6”	8”	1,975	1,648
FBN1501	60	1,500	96.2%	1,443	1,255	25:01:00	78″	30”	67 3⁄4″	1 1⁄2”	4”	8”	8”	2,307	1,961
FBN1751	70	1,750	96.2%	1,684	1,464	25:01:00	78″	30”	66 1⁄4″	1 1⁄2”	4”	8”	8”	2,458	2,017
FBN2001	80	1,999	96.2%	1,924	1,673	25:01:00	78″	30”	66 1⁄2″	1 1⁄2”	4”	8”	8”	2,570	2,087
FBN2501	125	2,500	96%	2,400	2,087	20:01	77 3⁄4″	35″	83 3⁄4″	2″	4″	8″	9″	3,600	2,577
FBN3001	150	3,000	96%	2,883	2,507	20:01	77 3⁄4″	35″	83 3⁄4″	2″	4″	10″	10″	3,900	2,881
FBN3501	175	3,500	96%	3,364	2,925	20:01	77 3⁄4″	42″	91 1⁄2″	2″	4″	10″	10″	4,600	3,218
FBN4001	333	3,999	96%	3,843	3,342	12:01	77 3⁄4″	45 1⁄2″	103 1⁄2″	2 1⁄2″	4″	12″	12″	5,200	3,805
FBN5001	500	4,999	96%	4,804	4,177	10:01	77 3⁄4″	46 1⁄2″	102 1⁄4″	2 1⁄2″	6″	12″	14″	5,900	4,101
FBN6001	600	6,000	96%	5,766	5,014	10:01	77 3⁄4″	50″	102 3⁄4″	2 1⁄2″	6″	14″	14″	6,900	4,711