• Heat-loss first: We calculate room-by-room BTU needs and confirm existing emitter output.

• Design water temps: Matching supply temps to your emitters (e.g., 120–150°F / 49–66°C for radiant, 140–180°F / 60–82°C for baseboard) protects comfort and efficiency.

• Hydraulic separation: Primary–secondary piping or a low-loss header prevents pump conflicts and short-cycling.

• Pumping strategy: Right-sized ECM circulators, proper ΔT (typically ~20°F / 11°C), balancing valves, and air elimination.

• Zoning: By valves or circulators, plus smart TRVs for radiators if desired.

• Water quality: Air/dirt/magnetic separation, inhibitor when appropriate, and glycol (if required) for protected loops.

• Direct-vent PVC/PP or concentric venting for mod-cons; chimney liner or power venting for non-condensing.

• Correct intake/exhaust clearances, sealed penetrations, and combustion air per code.

• Condensate neutralizer and drain with proper slope; CO and relief-valve safety checks.

1. In-Home Assessment & Options
   Heat-loss, emitter survey, piping review, gas/electrical, vent path, space/layout, and DHW usage profiling.

2. Design & Permits
   Piping schematic (primary–secondary or header), zone layout, pump sizing, controls strategy, and required permits.

3. Professional Installation

   • Boiler, venting, gas train, condensate neutralizer

   • Low-loss header or closely spaced tees; air/dirt/mag separators

   • ECM circulators, valves, expansion tank, backflow, mixing (for radiant)

   • DHW: combi setup or indirect tank with priority control

4. Commissioning

   • Combustion analysis, gas pressure, CO/CO₂, and draft verification

   • System purge, pressure test, expansion-tank pre-charge, relief-valve test

   • Outdoor reset tuning, thermostat/zone control verification, and homeowner training

5. Registration, Rebates & Warranty
   We register equipment, complete rebate applications, and provide a full documentation pack.

• Good: Cast-iron replacement, new ECM circulator, upgraded vent/liner, basic outdoor reset (if supported)
  For: Durable, straightforward upgrades on high-temp systems

• Better: Mod-con heat-only + indirect tank, low-loss header, ECM pumps, air/dirt/mag separation, outdoor reset
  For: Top comfort and DHW performance with strong efficiency

• Best: Premium mod-con (10:1 turndown) + indirect, smart zoning/TRVs, web-enabled control, hydraulic separator, full water-quality package
  For: Maximum efficiency, quietest operation, and best DHW recovery

(Model availability varies; we present multiple options at your quote.)

1. Area protection and removal of old equipment

2. Boiler mounting/placement, venting, gas/electrical, and drains

3. Piping build-out (header/primary–secondary), zoning, pumps/valves

4. System fill, purge, and pressure/combustion tuning

5. Owner walkthrough, maintenance schedule, and documents delivered

• Annual tune-up with combustion analysis and safety checks

• Inspect air/dirt/mag separators, clean strainers, test relief valves

• Verify expansion tank pressure and outdoor reset curves each season

• Add our Boiler Protection Plan for tune-ups, priority service, repair discounts, and safety checks (combustion, CO/venting, relief/expansion, low-water cutoff).

• Get a Boiler
• Boiler Repair
• Boiler Rebates & Incentives
• Boiler Buyer’s Guide

Mod-con vs. cast-iron—what’s the difference?
Mod-cons modulate and condense at low return temps for higher efficiency and steadier comfort. Cast-iron is rugged and simple but typically runs hotter and uses more fuel.

Is a combi right for my family?
Great for space savings and moderate DHW demand. For multiple simultaneous showers or large tubs, a boiler + indirect tank is usually better.

Will my old radiators work with a mod-con?
Yes—often even better. We may lower water temps to boost condensing efficiency and add TRVs for room-by-room control.

Do I need new piping?
Not always. We reuse sound piping and add a low-loss header/primary–secondary and modern pumps/valves as needed.

How long does installation take?
Most replacements are completed in one to two days depending on piping complexity and DHW options.

What maintenance is required?
Annual service: combustion analysis, cleaning, water-side checks, separator/strainer service, and control verification.