Radiant Heaters - UWM-ITAC Toolkit

Facility & Hours

Existing Heaters

Proposed IR

Costs & Incentive

Results & Export

01 Facility & Operating Hours

Facility / Company Name

Radiant Heater Brand (for report)

Operating Hours H (hr/yr) Heating season only (Oct–Apr ≈ 2,900 hr)

Running Factor RF (%) Fraction of time at full load

Load Factor LF (%) Fraction of rated output (usually 100%)

Natural Gas Rate R_G ($/MMBtu)

Heater Type (for report)

02 Existing Heater Inventory

Add one row per heater group. Use separate rows for different capacities.

Description / Location	Qty N	Capacity W_C (Btu/hr)	W_C × N (Btu/hr)
Total existing capacity:			–

Quick-add by capacity:

100k Btu/hr 125k Btu/hr 150k Btu/hr 175k Btu/hr 195k Btu/hr 200k Btu/hr 230k Btu/hr

Existing Heater Efficiency η_C (%) Typical conventional gas heater: 80%

03 Proposed Infrared Radiant Heaters

Radiant heaters warm occupants and surfaces directly without heating the full air volume, reducing stratification losses. Sized to 80–85% of existing capacity (ASHRAE RSF method) is typical.

Number of IR Heaters N_prop

Capacity per Heater W_P (Btu/hr) Total proposed: – Btu/hr

IR Heater Efficiency η_P (%) High-efficiency IR heater: 95%

04 Implementation Cost

Unit Cost per IR Heater ($)

Labor Hours per Heater

Labor Rate ($/hr)

Focus on Energy Incentive Rate ($/MBh proposed) Wisconsin FoE standard = $1.5/MBh · Enter 0 for none

Incentive Preview –

IC = –

Live Results

Energy

E_C current–

E_P proposed–

AES–

Cost

ACS–

Implementation

Equipment–

Labor–

FoE Incentive–

IC (net)–

Payback

–

0 yr5 yr10 yr

Generate Word Report

Formula Reference

E_C = (W_C × H × RF × LF) / (η_C × 10⁶)
E_P = (W_P × H × RF × LF) / (η_P × 10⁶)
AES = E_C − E_P [MMBtu/yr]
ACS = AES × R_G [$/yr]
IC = N·Cost + N·Labor − Incentive
FoE = W_P,tot/1000 × rate [$/MBh]
PBP = IC / ACS [yr]

W_C = existing total capacity (Btu/hr)
W_P = proposed total capacity (Btu/hr)
RF = running factor LF = load factor
η_C ≈ 80% existing η_P ≈ 95% IR