True STEAM Humidification Systems Module 2 True STEAM

True. STEAM™ Humidification Systems Module 2: True. STEAM Sizing and Selection

Module 2: Selecting & Sizing • Understanding Industry Standards & Guidelines for sizing • Calculating a home's humidity load requirements • Trade-offs of different humidifier types Key Learning Selecting the Right Humidifier for Every Job

Sizing – Establishing a Baseline • AHRI sets rating guidelines for humidifiers. (610 Guideline F) • Definitions - Capacity rating = Maximum output in 24 -hour period - Load requirement = Minimum output required to achieve 35%RH with external variables considered. • Traditionally, ratings advertised based on capacity *Based on a tight home with people living in it. • A better approach Base humidifier selection on LOAD REQUIREMENT to minimize excessive runtime, operating costs, and dealer callbacks.

Sizing – Refining the message • Assume fixed value 35%RH and hours needed to achieve. • Segmented by area size, average daily run times. • A bypass humidifier is rated at 12 GPD - Why not use this? - 12 GPD based on 120 F air passing through it - In a 2000 sq ft space, equals 13 hours of furnace run time - Furnace runtime more $$$ than True. STEAM in this example.

Sizing – True. STEAM Recommendations • HM 506: 500 -1800 for <80% daily run (<20 hr) • HM 509: 1000 -2300 for <80% daily run (<20 hr) • HM 512: 1500 -3000 for <80% daily run (<20 hr) • Within these home sizes, units should hit ideal humidity without running all day. • Why do some of the numbers overlap? - Variables within home affect these average run rates.

Variables within the home that affect humidity • Insulation - Tight, average or loose? • Ceiling height - Higher ceilings = smaller ft 2 coverable (larger total volume) • Indoor temperature - Higher temps require higher RH% to achieve desired comfort • Control settings • Ventilation – What sources of ventilation are there? - Fireplace flues - ERV/HRV/motorized dampers - Open windows - Old homes breathe more

Insulation – AHRI definition of structure type • 'Tight' = Well insulated with vapor retarders, tight storm doors, windows with weather stripping, dampered fireplace and using 1/2 air changes per hour for ventilation. • 'Average' = Insulated with vapor retarders, loose storm doors and windows, dampered fireplace with 1 air change per hour for ventilation. • 'Loose' = Generally built before 1930 with little or no insulation, no storm doors, no insulated windows, no weather stripping, no vapor retarders, undampered fireplace. Uses 1 -1/2 air changes per hour for ventilation. • How does this translate to load requirements? Square footage

Ceiling height • AHRI sets load requirements for a fixed 8 -ft ceiling height • Higher ceilings, open foyers, split level, stairway air shafts add to total CUBIC feet - Higher height = Lower width/length served (i. e. lower ft 2) • If ceiling height >8 ft, refer to ft 3, not ft 2. - Multiplying ft 2 by ceiling height equals ft 3 • How does this translate to load requirements? 10 ce 00 ft 2 ilin g @8 ft 12 ce 50 ft 2 ilin g @8 ft 15 ce 00 ft 2 ilin g @8 ft 20 ce 00 ft 2 ilin g @8 - ft 25 ce 00 ft 2 ilin g @8 - ft 30 ce 00 ft 2 ilin g @8 - ft

Frost Protection • Auto-humidity controls reduce and increase indoor humidity based on outdoor conditions. • What Honeywell Frost Protect reads… Frost setting limits achievable humidity.

Ventilation • Ventilation sources - Fireplaces w If fireplace present, ensure flue is kept shut when not in use - Forced air ventilators w HRVs and motorized dampers exhaust humidity - Open windows w Drier outside air infiltrates home, exhausts humidified air - Old homes breathe more w Pre-1985 buildings can be assumed to be ‘Average’ or ‘Loose’ insulation, unless retrofitted after. • How does this translate to load requirements? 10 00 ft 2 12 50 @ 8 -f tc 15 00 ft 2 @ eil 8 -f ing tc eil in g ft 2 @ 20 00 8 -f t ce ilin g 25 ft 2 @ 8 -f tc eil ing 00 30 ft 2 @ 8 -f tc 00 ft 2 @ 8 -f tc eil ing

Recommendations on Humidity with Ventilation • Educate homeowner on proper fireplace upkeep. • Ventilators – Recommend Energy Recovery style which retain moisture in home. • Shut and lock windows. • If average or loose fitting, upsize humidifier, or install multiple units if greater than 12 GPD is required.

Support Materials • Detailed Training Materials on Sizing Available! • Visit www. forwardthinking. honeywell. com - Click on Humidification • Enter literature form: #50 -1098: Proper Sizing #50 -1066: Selecting a Humidifier

Recap • Understanding Industry Standards & Guidelines for sizing • Calculating a home's humidity load requirements • Trade-offs of different humidifier types Key Learning Selecting the Right Humidifier for Every Job