Best for: Tankless & Combi Expertise
Rinnai specializes in hot water and condensing systems (no steam boilers available).
Yes — Rinnai boilers are a solid mid-range option. Our editorial score is 4.0/5 based on published efficiency, climate fit, warranty, features, and price positioning. Rinnai is associated with Rinnai Corporation; confirm the exact model platform, parts path, and coverage rather than assuming they are shared. For a Long Island home, compare the exact matched system and written installation scope because design and commissioning can matter as much as the badge on the equipment.
Ratings are editorial comparison scores—not customer reviews, installation counts, or manufacturer endorsements.
A useful Rinnai comparison starts with the exact indoor and outdoor model pairing—not the brand name alone. Home+ Air & Heat can review Rinnai boiler options for homes in our covered Nassau County and western Suffolk service areas, then document whether the proposed equipment, capacity, electrical scope, and installation approach fit the project.
Before work is authorized, ask for the design method, AHRI match where applicable, installer or dealer qualification required by the manufacturer, registration responsibility, parts coverage, labor coverage, exclusions, and current incentive assumptions in writing. Those details vary by model, project, contractor status, installation date, and current program rules.
Rinnai tankless water heaters are made by Rinnai Corporation, founded in 1920 in Nagoya, Japan. Rinnai America is headquartered in Peachtree City, Georgia, and manufactures tankless units for North America at its Griffin, Georgia plant. The brand is sold primarily through plumbing wholesalers and licensed installers.
Planning a Rinnai project on Long Island? See how we install and size it for Nassau & western Suffolk homes →
Rinnai rates 4.0 out of 5 in our mid range-tier boiler assessment. The scoring reflects build quality, parts availability on Long Island, warranty terms, and how the equipment holds up in the homes we service. It fits best when tankless & combi expertise. Reviews are only half the picture — sizing and installation quality drive most of the failures we get called to.
This is Home+ Air & Heat's own editorial assessment as an insured installing contractor, not an average of customer star ratings.
Rinnai strikes an excellent balance between performance, features, and value. Here's what Rinnai offers.
Up to 96% AFUE helps reduce your monthly energy bills.
A legacy of manufacturing excellence and continuous innovation.
Overall Score
Great For
Not Ideal For
Rinnai leverages their tankless water heater dominance to deliver premium wall-mounted boilers and combis. Founded in Japan in 1920, they've built an exceptional reputation for reliability and hot water performance. We install Rinnai throughout Nassau County in homes where endless hot water and space efficiency are priorities.
The i-Series combi boilers have become increasingly popular in Cape Cods and smaller Colonials where basement space is limited. Same-day parts availability at most local distributors means quick repairs during heating season emergencies. The 12-year heat exchanger warranty provides competitive protection.
Rinnai's WiFi Control-R app allows temperature adjustments and system monitoring from your smartphone. For tech-savvy homeowners in Manhasset, Great Neck, and Roslyn, this connectivity enhances convenience. Their proven tankless heritage ensures reliable hot water even during peak morning demand.
Our bottom line: Rinnai delivers premium Japanese engineering with the best WiFi connectivity in the category. If smart home integration and proven tankless technology matter to you, Rinnai justifies its premium pricing. All i-Series models qualify for PSEG rebates at 95-96% AFUE.
— Blake Ruwali, Home+ Air & Heat
Rinnai models with published specifications.
WiFi-enabled combi boiler from tankless water heating leader.
Best for: Tech-savvy homeowners in Cape Cods under 2,000 sq ft
$4,500 - $7,500installed
View Full DetailsRinnai boiler models with published AFUE, boiler type and typical installed price ranges.
Model: iSER
WiFi-enabled combi boiler from tankless water heating leader.
Estimated Installed Price:
$4,500 - $7,500
Best For
Tech-savvy homeowners in Cape Cods under 2,000 sq ft
Model: ESER
Reliable heat-only condensing boiler from tankless leader.
Estimated Installed Price:
$4,000 - $6,500
Best For
Homes with existing water heater
Model: MSER
Entry-level Rinnai condensing boiler at accessible pricing.
Estimated Installed Price:
$3,800 - $6,000
Best For
Budget-conscious homes wanting Rinnai quality
*Prices are estimates for Nassau County installations. Actual cost depends on home size, system complexity, and model selection.
Every Rinnai model family we track, with efficiency, size range, heat-exchanger warranty and a link to the manufacturer's data. Discontinued lines are flagged so you know what parts and service support to expect. Installed prices depend on your home, so every install is quoted.
| Model | Type | Fuel | AFUE | BTU input | Heat exchanger warranty | Source |
|---|---|---|---|---|---|---|
| i-Series Combi | Combi | — | 96% | 60k–120k | 12 years | — |
| E-Series | Condensing | — | 95% | 60k–199k | 12 years | — |
| M-Series | Condensing | — | 95% | 60k–175k | 12 years | — |
Estimated installed price: $3,200–$7,500. Estimate only, not a verified quote. Installed price varies with the model, your home and the system type, so every install is quoted.
Home+ services and installs Rinnai boilers across Nassau County and western Suffolk. See boiler installation, boiler repair, or compare every brand's lineup.
Understanding what's covered and how to protect your investment.
Parts Warranty
5 years
Covers major components like controls and pumps
Heat Exchanger
12 years
The heart of your boiler—cast iron or stainless steel
Labor Coverage
1 year
Manufacturer coverage for service calls
Extended Options
Available through dealer
Additional protection beyond standard warranty
Installed prices for Rinnai boilers range from $3,200 to $7,500 in Nassau County. Price varies by model efficiency, home size, and installation complexity.
$3,200 - $4,619
Entry-level models with solid performance
$4,619 - $6,038
Best balance of features and value
$6,038 - $7,500
Top-tier efficiency and features
Standard Installation
New boiler, same location
Steam-to-Hot Water Conversion
Complete system change
Chimney Liner
Required for high-efficiency
Permit & Inspection
Nassau County requirements
* Prices reflect typical installed costs in Nassau County as of September 2026. Actual costs may vary based on home size, system complexity, and local factors.
Recent Google reviews
Recent public reviews from homeowners who hired Home+ Air & Heat.
Bipul Mainali
Long Island, NY · Jan 2026
“They replaced my old, oxidized copper pipes connected to the boiler. The work was completed neatly, and the price was fair.”
Aaron Ramnarine
Long Island, NY · Jan 2026
“These guys do great work and are easy to deal with. I needed some work done on my boiler for the winter and everything was done easily in a timely manner. Will definitely be using them again in the future.”
Matthew Hoosein
Long Island, NY · Jan 2026
“I had a great experience with Homets Air and Heat. My heating system stopped working the other day, and they responded quickly with a clear explanation and prompt repair.”
Lochana Subedi
Hicksville, NY · Jan 2026
“I am a tenant in Hicksville, and when my heat went out during this cold stretch, it was a total emergency. The technician quickly resolved the heating issue.”
Khim Bhattarai
Long Island, NY · Jan 2026
“I hired them to fix my heat as it stopped working. They were quick to diagnose and fix it even during late hours.”
Devendra Bhattarai
Jamaica, NY · Dec 2025
“Heat stopped working in my Jamaica, NY home and these guys came out fast. They explained what was wrong, fixed it the same visit, and were very reasonable.”
Here's where Rinnai boilers tend to fit best across Long Island.
Rinnai's combi units eliminate the need for a separate water heater—perfect for the compact basements in 1950s developments.
Rinnai's 96% efficiency at mid-range pricing delivers the best ROI for moderately-sized suburban homes.
Installer Note: These are general guidelines based on our Nassau County experience. Every home is unique—we'll assess your specific heating needs during our free consultation.
See how Rinnai compares to other top boiler brands we install in Nassau County.
| Feature |
Current
|
 #1 |
 #4 |
D #14 |
|---|---|---|---|---|
|
Expert Rating
|
4.05/5
|
4.9/5
|
4.65/5
|
4.25/5
|
|
Max Efficiency
|
96%
|
95%
|
96%
|
87%
|
|
Starting Price
|
$3,200+
|
$4,500+
|
$3,800+
|
$2,400+
|
|
Heat Exchanger Warranty
|
12 years
|
Lifetime (cast iron)
|
10 years, model-specific limited coverage
|
20 years
|
| Best For | Tankless & Combi Expertise | Steam & Cast Iron Reliability | Reliable condensing boiler options across residential applications | Budget Steam Replacements |
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Tankless & Combi Expertise
Rinnai strikes an excellent balance between price and performance. With 96% AFUE efficiency and a 12 years heat exchanger warranty, it's a smart choice for most Nassau County homes.
Our Rating
4.05/5
Max Efficiency
96% AFUE
Heat Exchanger
12 years
Price Range
$3,200-$7,500
— Blake Ruwali, Home+ Air & Heat
Get answers to the most common questions about Rinnai boilers for Long Island homes.
Comprehensive guides for boiler installation, repair, and maintenance
Rinnai makes these boiler types. Explore our full recommendations:
Free estimate from Nassau County's boiler experts
Installed Price Range:
$3,200 – $7,500
*Includes equipment, labor, and permits
A great boiler installer on Long Island will outperform a premium unit installed poorly. Use the verification checklist and three-estimate worksheet before you sign anything.
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