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Product Details Rinnai 199,000 BTU Condensing Gas Boiler Combined Heater Wall Mounted NG/LP IP090199C The I-SERIES Plus™ Combi Condensing Gas Boil...
View full detailsProduct Details Rinnai 90,000 BTU Condensing Gas Boiler Combined Heater Wall Mounted NG/LP IP090099C The I-SERIES Plus™ Combi Condensing Gas Boile...
View full detailsProduct Details Rinnai 399K BTU Natural Gas RCB-Series Commercial Wall Boiler Ultra Low NOx RCB399AN The Rinnai 399K BTU Natural Gas RCB-Series C...
View full detailsProduct Details Rinnai 301K BTU Natural Gas RCB-Series Commercial Wall Boiler 120V RCB301AN The Rinnai RCB-Series is a high-efficiency, wall-mount...
View full detailsProduct Details Rinnai 60,000 BTU Condensing Gas Boiler Heater Wall Mounted NG/LP IP060S The I-SERIES Plus™ Solo Condensing Gas Boiler from Rinnai...
View full detailsProduct Details Rinnai 60,000 BTU Condensing Gas Boiler Combined Heater Wall Mounted NG/LP IP060160C The I-SERIES Plus™ Combi Condensing Gas Boile...
View full detailsProduct Details Rinnai 150,000 BTU Condensing Gas Boiler Heat Only Wall Mounted Natural Gas IP150S The I-SERIES Plus™ Solo Condensing Gas Boiler f...
View full detailsProduct Details Rinnai 90,000 BTU Condensing Gas Boiler Heat Only Wall Mounted Natural Gas IP090S The I-SERIES Plus™ Solo Condensing Gas Boiler fr...
View full detailsProduct Details Rinnai 199K BTU Condensing Gas Boiler Wall Mounted Propane Or Natural Gas IP199S The Rinnai IP199S is a high-efficiency, 199,000 B...
View full detailsProduct Details Rinnai 175,000 BTU Condensing Gas Boiler Wall Mounted Propane Or Natural Gas IP175199C The Rinnai I-SERIES Plus Solo Condensing Ga...
View full detailsProduct Details Rinnai 199,000 BTU Condensing Gas Boiler Wall Mounted Propane/Natural Gas IP199199C The Rinnai IP199C is a high-performance, 199,0...
View full detailsProduct Details Rinnai 175,000 BTU Condensing Gas Boiler Wall Mounted Propane & Natural Gas IP175S The Rinnai IP175S is a high-efficiency, 175...
View full detailsProduct Details Rinnai 120,000 BTU Condensing Gas Boiler Heat Only Wall Mounted Natural Gas IP120S The NEWI-SERIES Plus line of Solo and Combi Con...
View full detailsProduct Details Rinnai 150,000 BTU Condensing Gas Boiler Combined Heater Wall Mounted NG/LP IP150199C The NEWI-SERIES Plus line of Solo and Combi ...
View full detailsProduct Details Rinnai 120,000 BTU Condensing Gas Boiler Combined Heater Wall Mounted NG/LP IP120199C This high-performance Combi Boiler delivers ...
View full detailsHVAC Store provides superior boilers engineered for the precise requirements of hydronic heating in residential and light-commercial environments. Our selection ranges from compact wall-mounted configurations to high-capacity floor units, each vetted for thermal efficiency and long-term reliability. We focus on natural gas and propane systems with transparent AFUE ratings and BTU ranges, allowing professionals to match equipment to existing baseboard or radiant loads with technical accuracy.
HVAC Store provides superior boilers engineered for the precise requirements of hydronic heating in residential and light-commercial environments. Our selection ranges from compact wall-mounted configurations to high-capacity floor units, each vetted for thermal efficiency and long-term reliability. We focus on natural gas and propane systems with transparent AFUE ratings and BTU ranges, allowing professionals to match equipment to existing baseboard or radiant loads with technical accuracy.
Our inventory focuses on high-efficiency condensing boilers that reclaim thermal energy from exhaust gases before they exit the flue. These systems utilize cutting-edge stainless steel or advanced-alloy heat exchangers and sealed combustion to achieve AFUE ratings that significantly exceed traditional cast-iron standards. For projects requiring both space heating and domestic hot water (DHW) from a single footprint, our combi-boiler models integrate a condensing burner with on-demand water heating, eliminating the need for a separate storage tank.
These units are designed for versatile installation, with wall-hung formats that optimize floor space in tight mechanical rooms. Many models feature modulating burners that adjust heat output to match real-time demand, reducing fuel consumption and mechanical wear. Whether configured for natural gas or converted for propane, these boilers utilize optimized venting—often requiring only sidewall PVC or polypropylene—to simplify integration into modern building envelopes.
Fuel and Venting Requirements: Confirm your primary fuel source (natural gas or propane) and verify if your site requires a direct-vent (sealed combustion) or chimney-vent configuration to ensure code compliance.
Load Calculation and Capacity: Size your unit based on a professional heat-loss calculation; matching BTU output to the total radiant or baseboard load prevents short-cycling and extends the system’s service life.
Efficiency Ratings (AFUE): Prioritize high-AFUE condensing models to maximize fuel utilization and support eligibility for local utility or federal energy-efficiency rebates.
Combi vs. Heat-Only Platforms: Select a tailored solution based on your hot water needs; combi boilers streamline mechanical systems by providing space heat and endless DHW from one cabinet.
Advanced Control Integration: Look for units equipped with outdoor reset sensors and low-water cutoffs to optimize comfort levels while protecting the boiler's internal water circuit.
Unlike conventional units, a condensing boiler cools flue gases enough for water vapor to condense inside the heat exchanger. This process recovers latent heat that would otherwise be lost up the chimney, resulting in higher AFUE ratings and reduced energy waste.
A combi (combination) boiler functions as both a high-efficiency central heating boiler and a high-capacity tankless water heater. This innovative design saves significant space and reduces standby energy losses by heating water only when a tap is opened.
While condensing units offer the highest efficiency, cast-iron boilers are valued for their durability and "forgiving" nature in older, high-volume piping systems. They remain a reliable option for retrofits where existing chimney venting must be utilized.
Correct sizing requires a professional heat-loss calculation (Manual J) that accounts for insulation values, window surface area, and local climate data. A boiler with a BTU output matched to this calculation ensures the system reaches its rated efficiency without the inefficiencies of oversizing.
Boilers should be inspected annually by a licensed technician. This service includes analyzing combustion levels, cleaning the heat exchanger, verifying safety controls, and ensuring the condensate drain is clear of obstructions.
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