88 Series 2 Commercial Gas Oil Boiler

The Weil-McLain 88 Series 2 is a high-efficiency commercial boiler designed for reliable steam heating in schools, hospitals, and industrial buildings. With thermal efficiencies up to 85.6%, it supports multiple firing modes and fuel types, and its durable cast iron design ensures long-lasting performance and easy maintenance.

Features

High Efficiency

85.6% thermal efficiency

Flexible Firing

On/Off, Low/High/Off, Low/High/Low, or Full Modulation

Heater Options

With or without tankless heater

Install Choices

Packaged or knock-down

Fuel Flexibility

Gas, Oil or Gas/Oil

LEED Compliant

Complies to LEED

Boiler Type

Steam Boiler

Wide Range

1010 – 5845 MBH input

Horsepower Range

24-145 H.P.

Flexible Configuration

Single or multiple boiler systems

Locate a contractor Locate a Distributor Product Comparison Tool

big on warmth, low on energy use

Engineered for comfort, designed for efficiency

Certified ENERGY STAR® and heat pump ready, this high-efficiency boiler delivers powerful, eco-friendly performance while keeping energy costs low.

Technical Specs

MODEL	INPUT LIGHT OIL (MBH)	INPUT GAS (MBH)	GROSS OUTPUT (MBH)	NET STEAM (SQ. FT.)	OIL THERMAL EFFICIENCY (%)	GAS THERMAL EFFICIENCY (%)	FLUE OUTLET DIAMETER (IN.)	BOILER STEAM CONTENT (GALLONS)	APPROX. SHIPPING WEIGHT (LBS.)
1088	2,990	3,082	2,561	8,383	85.6	83.1	14	247	6,130
1188	3,325	3,428	2,848	9,213	85.7	83.1	14	270	6,695
1288	3,660	3,773	3,135	10,147	85.7	83.1	14	293	7,260
1388	3,995	4,119	3,422	11,071	85.7	83.1	14	316	7,890
1488	4,330	4,464	3,709	12,000	85.7	83.1	16	339	8,410
1588	4,665	4,809	3,996	12,925	85.7	83.1	16	362	9,005
1688	5,000	5,155	4,283	13,854	85.7	83.1	16	385	9,525
1788	5,335	5,494	4,570	14,783	85.7	83.1	18	408	9,780
1888	5,670	5,845	4,857	15,713	85.7	83.1	18	431	10,775
488	980	1,010	839	2,621	85.6	83.1	10	109	2,860
588	1,315	1,356	1,126	3,521	85.6	83.1	10	132	3,340
688	1,650	1,701	1,413	4,469	85.6	83.1	10	155	3,820
788	1,985	2,046	1,700	5,463	85.6	83.1	12	178	4,345
888	2,320	2,382	1,987	6,427	85.6	83.1	12	201	4,925
988	2,655	2,737	2,274	7,358	85.6	83.1	14	224	5,600

Downloads

Product Manuals

88 Series 2 Boiler Manual

Sales Collateral

88 Series 2 Brochure Hybrid Boiler System – Best of Both Worlds

Product Revit

Model 88 BIM-Revit

Technical Documents

Suggested Specs – 88

Product Supplements

Beckett (CG10, CG25, CG50) 550-142-027 Beckett 550-142-026 Carlin 550-142-030 Power-Flame (WJ30A, WJ50A) 550-142-028 Power-Flame WCR Burner Specification and Data Riello RL 550-142-024 Riello RLS 550-142-023 Riello RS 550-142-025 Webster (WJB1, WJB2) 550-142-022