94 Series 3 Commercial Gas Oil Boiler

The Weil-McLain 94 Series 3 Commercial Gas/Oil Boiler is engineered for high-demand commercial and institutional heating applications. Available in 18 sizes, it offers fuel flexibility with gas, oil, or dual-fuel options. Its heavy-duty cast iron construction and hydro-wall design ensure durability and efficient heat transfer. Simplified piping and easy maintenance access make it a reliable choice for long-term performance.

Features

Circulating Zone

Hydro-wall design with water circulating completely around the combustion area no refractory combustion chamber or separate base

Easy Maintenance

Designed for easy maintenance all heating surfaces can be cleaned from the left side of the boiler

Sealed Sections

Cast iron sections are made gastight with patented sealing rope design

Quick Assembly

Short draw rods permit faster, easier assembly of boiler sections

Fast Installation

Simplified piping reduces installation time no return header and fewer risers

Fuel Flexibility

Light oil, gas and gas-light oil forced draft firing water boiler with cast iron sections

Burner Ready

Burner mounting plate furnished as standard equipment for most models

Strong Design

H and T-shaped cross sections provide maximum design strength, 80 lbs working pressure available

High Efficiency

86.7% thermal efficiency

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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 WATER OUTPUT (MBH)	GROSS STEAM OUTPUT (MBH)	NET STEAM (SQ. FT.)	NET STEAM (MBH)	NET WATER (MBH)	OIL COMBUSTION EFFICIENCY – STEAM (%)	OIL COMBUSTION EFFICIENCY – WATER (%)	GAS COMBUSTION EFFICIENCY – STEAM (%)	GAS COMBUSTION EFFICIENCY – WATER (%)	OIL THERMAL EFFICIENCY – STEAM (%)	OIL THERMAL EFFICIENCY – WATER (%)	GAS THERMAL EFFICIENCY – STEAM (%)	GAS THERMAL EFFICIENCY – WATER (%)	FLUE OUTLET DIAMETER (IN.)	BOILER WATER/STEAM CONTENT (GALLONS)	APPROX. SHIPPING WEIGHT (LBS.)
H-1094	3,150	3,247	2,656	2,607	8,435	2,024	2,310	83.8	84.3	81.3	81.8	82.8	83.6	80.3	81.4	20	329.8	12,320
H-1194	3,500	3,608	2,957	2,897	9,372	2,249	2,571	83.9	84.4	81.4	81.9	82.8	83.3	80.3	81.3	20	357.5	13,162
H-1294	3,850	3,969	3,259	3,187	10,310	2,474	2,834	83.9	84.6	81.4	82.1	82.8	84	80.3	81.5	20	385.2	14,004
H-1394	4,200	4,330	3,562	3,481	11,262	2,703	3,098	83.9	84.8	81.4	82.2	82.9	84.2	80.4	81.6	20	413	14,846
H-1494	4,550	4,691	3,867	3,772	12,201	2,928	3,362	83.9	84.9	81.4	82.4	82.9	84.3	80.4	81.8	20	440.7	15,688
H-1594	4,900	5,052	4,172	4,062	13,140	3,154	3,628	84	85.1	81.5	82.5	82.9	84.5	80.4	82	20	468.4	16,530
H-1694	5,250	5,412	4,478	4,351	14,076	3,378	3,894	84	85.3	81.5	82.7	82.9	84.7	80.4	82.2	20	496.2	17,372
H-1794	5,600	5,773	4,786	4,641	15,015	3,604	4,162	84	85.4	81.5	82.9	82.9	84.9	80.4	82.3	20	523.9	19,014
H-1894	5,950	6,134	5,095	4,938	15,974	3,834	4,430	84	85.6	81.5	83	82.9	85.1	80.5	82.5	20	551.6	19,856
H-1994	6,300	6,495	5,404	5,228	16,914	4,059	4,700	84	85.7	81.5	83.2	83	85.3	80.5	82.7	20	579.4	20,698
H-2094	6,650	6,856	5,716	5,519	17,854	4,285	4,970	84	85.9	81.5	83.3	83	85.4	80.5	82.9	20	607.1	21,540
H-2194	7,000	7,216	6,028	5,809	18,792	4,510	5,241	84	86.1	81.5	83.5	83	85.6	80.5	83.1	20	634.8	22,552
H-2294	7,420	7,649	6,404	6,157	19,919	4,781	5,568	84	86.3	81.5	83.7	83	85.5	80.5	83.3	20	662.6	23,419
H-2394	7,700	7,938	6,655	6,390	20,672	4,961	5,787	84.1	86.4	81.5	83.8	83	86	80.5	83.4	20	690.3	24,286
H-2494	8,120	8,371	7,034	6,739	21,799	5,232	6,117	84.1	86.6	81.5	84	83	86.2	80.5	83.6	20	718	25,153
H-2594	8,400	8,660	7,288	6,971	22,552	5,413	6,338	84.1	86.7	81.5	84.1	83	86.4	80.5	83.8	20	745.8	26,020
H-894	2,464	2,540	2,052	2,040	6,598	1,584	1,784	83.7	84	81.2	81.4	82.7	83.2	80.3	80.7	20	274.3	10,636
H-994	2,800	2,887	2,357	2,318	7,500	1,800	2,050	83.8	84.1	81.2	81.6	82.8	83.4	80.3	80.9	20	302	11,478