- 95% AFUE, ENERGY STAR® Certified
- AI Control Technology, Auto Commissioning and Continuous Calibration functions optimize combustion and result in lower fuel costs. Control Panel features a backlit digital display that indicates boiler status, temperature and diagnostics.
- 6.9:1 Turndown Modulation Ratio in DHW Mode (MAC-115)
- 7:1 Turndown Modulation Ratio in DHW Mode (MAC-150, MAC-205)
- 5.6:1 Turndown Modulation Ratio in Heating Mode (MAH-100, MAC-115)
- 5.7:1 Turndown Modulation Ratio in Heating Mode (MAH-125, MAC-150)
- 5.5:1 Turndown Modulation Ratio in Heating Mode (MAH-165, MAC-205)
- Flow Rate in DHW Mode:
- 5.0 GPM @ 70° F rise (MAC-205)
- 3.5 GPM @ 70° F rise (MAC-150)
- 2.5 GPM @ 70° F rise (MAC-115)
- Primary/Secondary LABOR SAVER™ Manifold Included
- Heat Exchanger: 316L Stainless Steel Heat Exchanger and Burner. MAC-205, MAC-150 and MAC-115 are also equipped with a Stainless Steel Brazed Plate Heat Exchanger.
- Additional Features: Assembled Boiler With Jacket, Induced Draft Fan, High Limit Sensors, 30 psi Relief Valve, Low Water Pressure Switch and, Temperature/Pressure Gauge.
- Built in load matching Pump contributes to savings in electrical usage.
- Outdoor Temperature Sensor, Indirect Tank Sensor and, Floor Stand Kit
- Our AI control technology is programmed to recognize an Indirect Tank. H2O Indirect Hot Water Heaters are available in 30 to 115 gallon capacities and feature 316L stainless steel construction and top connections for an easy installation.
Looks good, runs good. Having some issues with the hot water not mixing properly all the time. Install company not sure what is causing it.
Condensing Gas Boiler - MAC/MAH High
Nice compact unit. Longer horizontal combi venting runs are difficult.
Condensing Gas Boiler - MAC/MAH High
Easy install customer support was fast and easy
Condensing Gas Boiler - MAC/MAH High
Very efficient and fairly easy to install. Had no issues upon startup
Condensing Gas Boiler - MAC/MAH High
Every contractor I talked to said this is the best boiler they have installed!
Condensing Gas Boiler - MAC/MAH High
I’ll recommend it to my customers. It’s made nice. Easy to work on it.
Condensing Gas Boiler - MAC/MAH High
Yes, great space saver and love the unlimited hot water.
Condensing Gas Boiler - MAC/MAH
Great product. Very quiet and reliable. Good tech support.
Condensing Gas Boiler - MAC/MAH High
It’s super compact. The unit is so quiet but my only concern was the water run off, but I muffled that.
Condensing Gas Boiler - MAC/MAH High
Ease of installation and performance would be the two main features I would share. I also like the quiet operation of the unit. I live in CT, and installation occurred on this winters coldest day. The water inlet temperature is very cold this time of year, and but the on demand DHW comes on pretty quickly and fills a tub super hot.
Condensing Gas Boiler - MAC/MAH High
Very clean, doesn’t take up much room and works great!
Condensing Gas Boiler - MAC/MAH High
This boiler installed very quickly and easy.
Condensing Gas Boiler - MAC/MAH High
I would recommend it and have. It is so nice to have on demand hot water and there is no noise.
Condensing Gas Boiler - MAC/MAH High
Great boiler very efficient and definitely quiet. Easy to install.
Condensing Gas Boiler - MAC/MAH High
The overall dimenseions, efficiency, and ease of use is great. After speaking to many installers/ HVAC technicians, Utica was the most frequently suggested brand to purchase. Low maintenance, quality of construction, and high quality components were the main reasons for the recommendations.
Condensing Gas Boiler - MAC/MAH High
Yes I would recommend this product because it is small, compact, quiet and easy to install.
Condensing Gas Boiler - MAC/MAH High
Yes I would recomment this product. Unit is very quiet, east to install, and a great value compared to other brands.
Condensing Gas Boiler - MAC/MAH High
I would recomment this product. The product is very efficient and works great.
I would strongly recommend this product to anyone in need of replacing existing boiler/water heater or just upgrading for efficiency purposes.
Condensing Gas Boiler - MAC/MAH High
Works well.
On the Mac 150 if they had the hot and cold inlets off set from the boiler inlet and out let it would ease the install, now they are all inline.
Condensing Gas Boiler - MAC/MAH High
Yes I would recomment this product to a friend. Dependable, easy to install, and helpful tech support.
Condensing Gas Boiler - MAC/MAH High
Saving money and energy with your product.
Spring brook fuel and ice should NOT be installing your product no license and don’t know what they are doing. Without your rep my unit would not be working.
Condensing Gas Boiler - MAC/MAH High
This was an easy installation and is a good boiler for larger homes.
I had a hard time with the venting of this boiler. The supply house didn’t have a good knowledge of this product. I was told I could vent it with 2″ pipe. After talking to the factory service and engineering department I was still unsure of how to vent it. Help finaly came when I talked to Howard Dyson and Gary Alex. I ended up venting the boiler with 2″ cpvc on the exhaust side and pvc on the intake.
Condensing Gas Boiler - MAC/MAH High
I highly recommend Utica Boilers. Built in USA. Rep for company is very helpful
Condensing Gas Boiler - MAC/MAH High
The 40 year old boiler we had never gave us a problem but replaced to be more efficient
Condensing Gas Boiler - MAC/MAH High
Easy installation and user friendly
Condensing Gas Boiler - MAC/MAH High