1. “Beyond the loop layout”

2.  Jeremy Neven, C.B.C.O. ◦ Chief Building Official ◦ Plumber ◦ HVAC Designer ◦ jneven@centralfrontenac.com jneven@centralfrontenac.com

3.  Types of Hydronic Heating  Applicable OBC references  Referenced standards  Hydronic loop layouts  Boiler piping layouts  Plans review  Inspection points

4.  Short cycling equipment  Reduced efficiencies  Premature equipment failure  Cross connections  Possible contamination  Product certification  Improper use of equipment

5. In-floor encased in concrete massUnder floor In joist Under floor with concrete overpour

6. Water heater (boiler) Radiator Fan Supply and return hydronic piping

8. Cast Radiator Towel warmer Kickspace heater Fan coil Indirect water heater

9.  9.33 ◦ 9.33.1.1.(1) “The design and installation of central heating systems, including the requirements for combustion air, shall conform to Part 6 and this Section.” ◦ 9.33.2.2.(1) “The heating system capacity shall be based on the heating load calculated in accordance with Sentence 6.2.1.1.(1).” ◦ 9.33.2.2.(3) “The heating and cooling equipment capacities shall be determined in accordance with the requirements of CSA F280, “Determining the Required Capacity of Residential Space Heating and Cooling Appliances.””

10.  6.2 ◦ 6.2.1.1.(1) “Heating, ventilating and air-conditioning systems, including related mechanical refrigeration systems, shall be designed, constructed and installed to conform to good engineering practice appropriate to the circumstances such as described in,” (e) the HRAI Digest, (f) the Hydronics Institute Manuals, ◦ 6.2.1.4.(6) “The design and installation of hydronic heating systems shall conform to, (a) CAN/CSA-B214, “Installation Code for Hydronic Heating Systems”, or, (b) good engineering practice appropriate to the circumstances such as described in Article 6.2.1.1.”

11.  Residential Radiant Hydronic Design ◦ Comprehensive design manual covering all aspects of design including radiant layout AND boiler piping ◦ Referenced by the OBC

12.  Installation code for hydronic heating ◦ Comprehensive code that covers all aspects of installation ◦ Referenced by the OBC

15. ◦ OBC 6.2.1.1.(1) “Heating, ventilating and air-conditioning systems, including related mechanical refrigeration systems, shall be designed, constructed and installed to conform to good engineering practice appropriate to the circumstances such as described in,” (e) the HRAI Digest, (f) the Hydronics Institute Manuals,  Must be designed by a qualified HRAI designer with an appropriate BCIN designation (HVAC house and Designer legal)  Without a design – Heat loss/Gain, Radiant design, Ventilation design – what do you use to verify compliance?  Boiler piping design?

16.  Length of loops ◦ Approx. Max 250’ plus “tails”  Varies with flow, pipe diameter, fluid temperature  Water flow ◦ Range between.5GPM to 5 GPM  Water temperature ◦ Dependent upon floor coverings  Tile, concrete, etc –  Carpet  Hardwood  Engineered flooring

18.  Floor Temp ◦ B214 – max 25C in areas where prolonged foot contact with the floor is likely.  Pipe Spacing ◦ Typically 12” O.C. but will vary by design with changes to flow, pipe diameter, fluid temp, floor covering and area being heated. B214 states a maximum variance of +- 10% from design or +- 20% where on site conditions conflict with the design.

21. Compliance? OBC HRAI Digest B214

22.  OBC ◦ 6.2.1.1.(1). Requires heating systems to be designed to good engineering practice…. ◦ 6.2.1.4.(6). Requires hydronic heating systems to be designed and installed in conformance with CSA B214 ◦ 6.2.1.9.(1). Heating and cooling systems shall be designed to allow for expansion and contraction of the heat transfer fluid and to maintain the system pressure within the rated working pressure limits of all components of the system

23.  OBC ◦ 6.2.9.3.(1). Clearances between combustible material and bare pipes carrying steam or hot water shall conform to Table 6.2.9.3 (less than 95C – 0 clearance) ◦ 7.6.1.12. – Relief valves. ◦ 7.6.2.1.(1). Connections to potable water systems shall be designed and installed so that non-potable water or substances that may render the water non- potable cannot enter the system

24.  OBC ◦ 7.6.2.2.(2). Where a potable water supply is connected to a boiler, tank, cooling jacket, lawn sprinkler system or other device where a non- potable fluid may be under pressure that is above atmospheric or the water outlet may be submerged in the non-potable fluid, the water supply shall be protected against backflow by a backflow preventer.

25.  Fill Regulator ◦ Fill Regulators – B124 – 12.5.4. ◦ Located at the expansion tank ◦ Pressure reducing valve to be installed on the make up water feed ◦ Connections must be made in accordance with CSA B64.10/CSA B64.10.1to prevent backflow

26.  Backflow Preventer ◦ CSA B124 – CSA B64 ◦ OBC 7.6.2.2.(2). ◦ Many different styles

28.  Air Elimination ◦ B214 12.6.1 – Air removal device ◦ Provision shall be made for the removal of air in the heat distribution piping system……..

29.  Air Elimination ◦ B124 – 12.6.2 ◦ An air separation device shall be incorporated into a closed loop heat distribution system…..

30.  Air Elimination

31.  Blow off valves ◦ OBC 7.6.1.12. ◦ Pressure relief required where pressure vessels are used ◦ Temperature relief required for hot water tanks ◦ Can be combined ◦ Must be piped to within 150mm to 300mm of the floor ◦ Can not have a thread on the end ◦ Must discharge vertically ◦ Must not be smaller than the outlet of the relief valve.

32.  Expansion tank ◦ OBC 6.2.1.9.(1). Heating and cooling systems shall be designed to allow for expansion and contraction of the heat transfer fluid and to maintain the system pressure within the rated working pressure limits of all components of the system

34.  Designer qualifications: ◦ HRAI ◦ BCIN  Loop layout includes: ◦ Loop lengths ◦ Pipe diameter ◦ Flow rates ◦ Fluid temperature

35.  Boiler piping layout: ◦ Boiler size ◦ Boiler efficiency ◦ Control valves shown  Make up water, backflow, mixing valves,etc ◦ Expansion tank ◦ Heating zone temps and devices ◦ Supplemental heat required? ◦ System design  Primary/secondary system, circ pumps, etc.

36.  In floor piping matches design (within +- 10%)  Pipe ratings are CSA B137.5, ASTM F876 or DIN 16892 and DIN 16893  Pipe spacing  Air test (60psi for 1 hour) B124 - 4.5.1  Under slab insulation value  Slab penetration with pipe ( B124 - 14.4.2.)  Oxygen barrier pipe

37.  Underslab insulation compliance ◦ B214 – 14.4.4.3.  Thermal insulation installed under a poured concrete radiant floor system in contact with the soil shall comply with the requirements of  (a) CAN/ULC-S701  (b) CAN/ULC-S704 or  (c) CAN/ULC-S705.1

38.  Boiler and other equipment matches design for size and efficiency  Pressure and temperature relief valves installed and piped accordingly  Make up water and pressure reducer installed  Expansion tank installed  Air eliminator installed  Backflow preventer installed

39. Common component in radiant systems.

40.  B214 ◦ 16.2 – Must comply with CSA B51 ◦ 16.3 – Temperature and pressure relief valve must be installed to limit temperature to maximum of 99 C ◦ 16.4 – Thermostatic mixing valve required to limit domestic hot water to not greater than 60 C if normal operating temperature of the boiler exceeds 60 C

41.  Heat anticipating thermostats ◦ Turns off heating system prior to setpoint to ensure that “overshooting” of the setpoint does not occur.  System temperature design ◦ Allowing high heat zones to use heating fluid prior to lower heat zones. (common with primary/secondary systems)  Outdoor reset control ◦ Adjusts the fluid temperatures up and down dependant upon outdoor temperatures. Helps prevent short cycling and can increase efficiency