Boiler Installation & Replacement in Des Moines, IA

Hydronic System Design & Equipment Selection

Once we understand your heating load, we design your complete hydronic system and present equipment options. Boilers come in different types: cast-iron models are durable, reliable, and affordable but achieve AFUE 80–85%; condensing boilers capture waste heat from flue gases and achieve 90%+ efficiency but require corrosion-resistant piping and water treatment because condensing boilers produce slightly acidic condensate.

We'll also design the supporting system: the expansion tank (which absorbs water expansion as it heats and prevents dangerous pressure buildup), the pressure relief valve (which protects the system if pressure exceeds safe limits, typically 30 PSI), zone valves (if you want different temperatures in different parts of your home), and circulating pumps (which move heated water through the piping at the proper flow rate).

We'll discuss water treatment options thoroughly—whether your existing water is suitable or whether we recommend a softener, corrosion inhibitor, or oxygen scavenger to protect your investment. Des Moines water quality varies by neighborhood, and some areas have harder water that accelerates scale buildup if untreated.

What You'll Receive

System Preparation & Component Staging

Before installation day, we prepare your home for the new boiler. We'll assess the location where the new boiler will sit—usually a basement, mechanical room, or utility closet. We'll verify that gas lines, electrical supply, water lines, and piping are accessible and in acceptable condition. If piping modifications are needed, we'll discuss that upfront.

We'll schedule any prerequisites: gas line installation or conversion, electrical upgrades if needed, piping modifications, or water treatment system installation. We'll coordinate with utility companies if gas line work requires their involvement. We'll brief you on installation day logistics—where our crew will be working, how long the process takes, what to expect during the water changeover, and any inconveniences.

Preparation Checklist

Professional Boiler Installation & Hydronic Integration

Installation day is where expertise shows. Our technicians carefully position your new boiler, making sure it's level, properly supported on a concrete pad or mounting frame, and positioned for optimal airflow and clearance from walls and combustible materials. They connect the gas line with proper fittings and shutoffs, test all connections for leaks using soapy water and pressure testing with nitrogen, and verify proper gas supply pressure and flow rate.

They'll also connect the hydronic piping carefully—the return line (bringing cool water back to the boiler for reheating), the supply line (carrying hot water out to your baseboard, radiators, or radiant floors), and any zone valves for multi-room control. All connections are soldered with proper solder alloys and fitting materials that won't corrode over time. The expansion tank is connected to the system with a proper isolation ball valve and pre-charged to the correct pressure using nitrogen—typically about 12 PSI for most residential systems.

Circulating pumps are installed and oriented correctly (the flow arrow on the pump must match water direction); improper pump orientation is a common installation error that reduces flow. The pressure relief valve is set to the manufacturer's specification and tested to verify it opens at the correct pressure (typically 30 PSI).

Installation Details

Combustion Analysis, Pressure Balance & Your Training

Once the boiler is running, we perform a comprehensive combustion analysis—a technical test that measures exhaust gas temperature, oxygen content, carbon monoxide levels, and draft to verify the boiler is operating safely and efficiently. A proper combustion analysis confirms that the gas flame is stable, the fuel-air mixture is optimized, and all exhaust products are exiting safely.

We'll also verify water pressure and temperature are stable and within normal operating range, bleed any trapped air from the system (air in hydronic piping can cause cold spots and noise), and test that zone valves (if present) direct water correctly to different zones. We'll verify the thermostat is reading accurately and controlling the boiler properly.

We then walk you through boiler operation in detail: how to set the thermostat for your daily schedule, what pressure gauge readings are normal (typically 12–30 PSI depending on system height), how to recognize warning signs (unusual noises like knocking or banging, pressure spikes, cold radiators or baseboard sections, or leaks), and what to do if your boiler stops working.

Before We Leave