combined space and water heating: making it work...why use a high efficiency combined system? ......
TRANSCRIPT
![Page 1: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/1.jpg)
Combined Space and Water Heating: Making it Work
High Efficiency Heating in a Single Package
Ben Schoenbauer, Center for Energy and Environment Jake McAlpine, Sustainable Resource Center February, 26th, 2014
![Page 2: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/2.jpg)
Pg. 2
In accordance with the Department of Labor and Industry’s statute 326.0981, Subd. 11, “This educational offering is recognized by the Minnesota Department of Labor and Industry as satisfying 1.5 hours of credit toward Building Officials and Plumbing continuing education requirements.” For additional continuing education approvals, please see your credit tracking card.
![Page 3: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/3.jpg)
Pg. 3
About CEE
The Center for Energy and Environment (CEE) is a nonprofit organization that promotes energy efficiency to strengthen the economy while improving the environment. CEE conducts research and develops programs so that: • Businesses operate more efficiently and profitably; • Government agencies and nonprofits spend less on
facilities and functions; • Utilities achieve their energy-efficiency goals at least-
cost; and • Households save money and improve comfort.
![Page 4: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/4.jpg)
Pg. 4
About SRC
• The Sustainable Resources Center is a nonprofit community organization dedicated to creating healthy and efficient home environments for all residents.
• SRC works with homeowners to create healthy homes by providing:
• Detailed energy audits and building testing • Air sealing and insulation services • Lead testing and mitigation • Radon testing and mitigation
![Page 5: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/5.jpg)
Pg. 5
Project Support
• Sustainable Energy Resources for Consumers (SERC) • Department of Energy • Created to allow local weatherization agencies to install
weatherization materials and technologies that have promise for energy savings and benefits to customers, however cannot currently be installed under the traditional Weatherization Assistance Program.
• Building America • Department of Energy • Conducts research to continually develop innovative, cost-
effective energy saving solutions—better products, better new homes, better ways to improve older homes, and better buildings in which we work, shop, and lead our everyday lives.
![Page 6: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/6.jpg)
Pg. 6
What are Combination Systems?
• Combination Systems… • Use a single heating plant to provide both space and water
heating • Systems can provide space heat with hydronic or forced air
distribution
• Also Known As • Combi • Combo • Dual Integrated Appliances
![Page 7: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/7.jpg)
Pg. 7
Why use a high efficiency combined system? • Combining loads…
• Improved space and water heating performance • Reduced installation costs • Reduced venting needs • Reduced gas piping • Potentially reduced maintenance • Easy integration with ventilation, air conditioning, etc • Good for retrofits • Good for low load and continually improving homes
![Page 8: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/8.jpg)
Pg. 8
Our Focus: Systems that Work
• Our Priorities • Safety • Reliable • Easy to install • Easy to operate and maintain • Energy Savings
![Page 9: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/9.jpg)
Pg. 9
Hydronic Combi Systems
![Page 10: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/10.jpg)
Pg. 10
System Types
• DHW options • Indirect tank • Integrated tank • Low mass heat exchanger
• Space heating options • Radiant • Radiators • Baseboards
Indirect Tank
![Page 11: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/11.jpg)
Pg. 11
Installation of Condensing Boiler
• Venting • Combustion air • Circulation pump
• High efficiency • Variable frequency
• Space heating distribution size and type (new construction)
![Page 12: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/12.jpg)
Pg. 12
Condensing Optimization
• Baseboard • Supply Water Temperatures: 170 °F to 190 °F • Return Water Temperatures: 150 °F to 170 °F
• High Performance Baseboard • Supply Water Temperatures: 120 °F to 150 °F • Return Water Temperatures: 100 °F to 130 °F
• Radiant Heating • Supply Water Temperatures: 100 °F to 120 °F • Return Water Temperatures: 80 °F to 100 °F
![Page 13: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/13.jpg)
Condensing Optimization
Radiant High Performance Baseboard Baseboard
![Page 14: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/14.jpg)
Pg. 14
Retrofit Upgrade
• Reduce return water temperature • Increased the temperature drop through distribution
• More output • Lower flow rates
• Reduce set point temperature • Aggressive outdoor reset
• Purge boiler to indirect tank to reduce loses at end of space heating event
![Page 15: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/15.jpg)
Pg. 15
Controls
• Cycle Management • Avoid short cycling • Pre purge • Post purge
• DHW utilizing waste heat • Outdoor reset
• Aggressive resets minimize return water temperatures
![Page 16: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/16.jpg)
Pg. 16
Performance
![Page 17: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/17.jpg)
Pg. 17
Forced Air Systems
![Page 18: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/18.jpg)
Pg. 18
System Types
• DHW Options • Water heaters
• Storage • Tankless • Hybrid
• Boilers • Indirect tank • Internal – low mass HE or storage
• Space heating • Air handler • Air handler integration with heat recovery ventilation • Air handler integration with air conditioning
![Page 19: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/19.jpg)
Pg. 19
Best Practices
• Installation • Optimization • Operation • Controls • Lessons Learned
19
![Page 20: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/20.jpg)
Pg. 20
Installation
EXISTING COMBI
![Page 21: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/21.jpg)
Pg. 21
System Selection
• Safety • Combustion • Scalding
• Maintenance and durability • Ease of Installation and Use • Performance
• User satisfaction • Energy Use
![Page 22: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/22.jpg)
Pg. 22
Air Handler Selection
• Important Characteristics to consider: • Capacity • Return water temperature • Electric usage
• Equipment • Coil characteristics and heat transfer rates • Fan characteristics • Pump characteristics
![Page 23: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/23.jpg)
Pg. 23
Heating Plant Sizing
![Page 24: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/24.jpg)
Pg. 24
Venting
Concentric
Two Pipe
Non-‐sealed
Non-‐Condensing
![Page 25: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/25.jpg)
Pg. 25
Optimizing Efficiency
![Page 26: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/26.jpg)
Pg. 26
No Optimization
![Page 27: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/27.jpg)
Pg. 27
Improved Installation
![Page 28: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/28.jpg)
Pg. 28
Fully Optimized
![Page 29: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/29.jpg)
Pg. 29
Installed Performance
![Page 30: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/30.jpg)
Pg. 30
Water Temperature Delivery
Storage (Cond)
Tankless (Cond)
Hybrid (Cond)
Storage (non-‐Cond)
![Page 31: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/31.jpg)
Pg. 31
Storage WH Tankless Hybrid WH
Delivered Air Temperature
![Page 32: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/32.jpg)
Pg. 32
Stand by Loses
![Page 33: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/33.jpg)
Pg. 33
Stand-by Loses
![Page 34: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/34.jpg)
Pg. 34
Savings
• From field monitoring
![Page 35: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/35.jpg)
Pg. 35
Cost
![Page 36: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/36.jpg)
Pg. 36
Controls
• Outdoor reset • Air handler fan modulation • Air handler pump modulation • Load matching • Set back control for both space and DHW systems
![Page 37: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/37.jpg)
Pg. 37
Programs: Lessons Learned
• Assessing the needs of the home and letting that inform the system that is installed
• number people and showers and how that effects comfort • water quality • thermostat set points and setbacks
• Code officials • ask first, install second!
• Having good contractors • learning curve • training
![Page 38: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/38.jpg)
Pg. 38
Programs: Lessons Learned
• Bids • when do they work? • retrofit vs. new build
• The roll of product reps • distribution of products • technical and warranty assistance
• Ensuring quality of installation • equipment specific requirements • field verification of installation • optimization and maintenance
![Page 39: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/39.jpg)
Pg. 39
Calculated versus Actual Load
![Page 40: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/40.jpg)
Pg. 40
Calculated versus Actual Load
![Page 41: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/41.jpg)
Pg. 41
Conclusions
• These systems can be economically installed with homeowner satisfaction and safety as well as good performance
• Hydronic systems are more common, but high efficiency performance is often overlooked
• Simplicity and durability are key for forced air systems • Storage tanks and oversized air handlers
• More information available at • www.mncee.org/dia
![Page 42: Combined Space and Water Heating: Making it Work...Why use a high efficiency combined system? ... Hydronic Combi Systems . Pg. 10 System Types ... Optimizing Efficiency . Pg. 26 No](https://reader033.vdocuments.us/reader033/viewer/2022050311/5f732846696bb4362468e1a9/html5/thumbnails/42.jpg)
Ben Schoenbauer Jake McAlpine