
Experience consistent, high-volume domestic hot water delivery with the Lochinvar SIT040, a premium 40-gallon indirect water heater engineered for residential and light commercial demands. Built to integrate seamlessly with your boiler system, this Squire series unit prioritizes durability and rapid heat exchange to eliminate hot water shortages during peak usage periods.
This indirect water heater functions by circulating hot water from your primary boiler through an internal heat exchanger coil located inside the tank. As the boiler water flows through the coil, it rapidly transfers thermal energy to the domestic water stored within the tank, maintaining a constant temperature with superior recovery times compared to standalone heaters.
Key System Performance Baselines:
- Durable Construction: Crafted from 316L stainless steel for maximum corrosion resistance and longevity.
- High-Capacity Recovery: Features a robust first-hour recovery rate of 208 gallons.
- Efficient Throughput: Delivers high flow rates up to 14 gallons per minute to meet simultaneous demand.
- Thermal Output: Rated for 115,000 BTU input to ensure rapid reheating cycles.
⚠️ Application Profile: Ideal for multi-bathroom homes, luxury residences, and small-scale commercial applications requiring high-velocity hot water delivery for showers, laundry, and dishwasher systems.
| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | SIT040 |
| Model Designation | Squire |
| Capacity | 40 Gallons |
| Material | 316L Stainless Steel |
| First-Hour Recovery | 208 Gallons |
| Recovery Rate | 181 Gallons Per Hour |
| Maximum Flow Rate | 14 GPM |
| BTU Rating | 115,000 BTU |
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
Apply for Trade Account & Terms →📋 Procurement & Shipping Notice
- LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
- Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?
👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.