Ahmad (AJ) A.’s Post

𝗛𝗲𝗮𝘁 𝗣𝘂𝗺𝗽𝘀: 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗙𝗮𝗰𝘁𝘀 & 𝗔𝗻𝗮𝗹𝘆𝘀𝗶𝘀 In previous post [https://lnkd.in/eS-zQJ22], I explained how to size your Heat Pump system working back from a real-life Enbridge Gas example bill In this post, I dive into the technical details from example Heat Pump Spec Sheet and share my engineering analysis and insight for use in Canadian Winter ⚠ It's important to understand the technical facts and limitations thereof prior to installing a new Heat Pump and ridding off your natural gas furnace Attached are summary spec sheet for the 𝗟𝗬𝗡𝗫™ 𝟭𝟴 𝘐𝘯𝘷𝘦𝘳𝘵𝘦𝘳 𝘈𝘪𝘳 𝘏𝘦𝘢𝘵 𝘗𝘶𝘮𝘱, and my analysis for the 3.6 Ton model# 𝟰𝗛𝗣𝟭𝟴𝗩𝟯𝟲𝗣 I have edited and highlighted key specs. It's important to consult the 𝙢𝙖𝙣𝙪𝙛𝙖𝙘𝙩𝙪𝙧𝙚𝙧'𝙨 𝙥𝙧𝙤𝙙𝙪𝙘𝙩 𝙨𝙥𝙚𝙘𝙞𝙛𝙞𝙘𝙖𝙩𝙞𝙤𝙣𝙨 [1] do not trust pseudo science and sales pressure tactics. You have been warned 😉 𝑬𝒏𝒈𝒊𝒏𝒆𝒆𝒓𝒊𝒏𝒈 𝑨𝒏𝒂𝒍𝒚𝒔𝒊𝒔 & 𝑰𝒏𝒔𝒊𝒈𝒉𝒕 1. The Lynx 𝟰𝗛𝗣𝟭𝟴𝗩 comes in two models, a 𝟯.𝟲 and 𝟲.𝟬 Tons versions. 2. Operating Temperature Range: -𝟭𝟱°𝗙 to +𝟭𝟮𝟱°𝗙  (-26.1°C to +51.6°C) 3. Heating Performance for the 3.6 Ton version are given on pages 19 ~ 21 for different 𝗜𝗻𝗱𝗼𝗼𝗿 𝗖𝗼𝗶𝗹 𝗧𝗲𝗺𝗽𝗲𝗿𝗮𝘁𝘂𝗿𝗲𝘀, i.e. "𝙙𝙧𝙮 𝙗𝙪𝙡𝙗" (65°F, 70°F and 75°F) vs 𝗢𝘂𝘁𝗱𝗼𝗼𝗿 𝗧𝗲𝗺𝗽𝗲𝗿𝗮𝘁𝘂𝗿𝗲 4. For the analysis and comparison, I used MAXIMUM CAPACITY figures on page 19 to plot Efficacy vs Outdoors Temperature 5. Based on a 𝒏𝒐𝒎𝒊𝒏𝒂𝒍 𝒓𝒂𝒕𝒊𝒏𝒈 of 𝟰𝟮.𝟱𝙠𝘽𝙩𝙪𝙝 and 𝟲𝟱°𝗙 𝙙𝙧𝙮 𝙗𝙪𝙡𝙗, I calculate run-time for the 3.6Tons version for a 𝒃𝒆𝒏𝒄𝒉𝒎𝒂𝒓𝒌, Column "G" 6. Now, I compute heat pump run-time for different Efficacy Rating and Outdoor Temperatures simulating Canadian Winter at [10°C, 0°C, -10°C, -20°C and -35°C], Columns "H ~ L" 7. For easy visuals, I color coded the results and set the threshold for 𝟭𝟲𝙝𝙧𝙨 run-time ("𝑅𝑒𝑑 " > 16𝙝𝙧𝙨, "𝐺𝑟𝑒𝑒𝑛" < 16𝙝𝙧𝙨, "𝐺𝑟𝑒𝑦" 𝗛𝗘𝗔𝗧 𝗢𝗙𝗙) From run-time data, we can extract invaluable insight 1. Heat Pump Efficacy significantly drops with decreasing temperature. For example; 👉 At 0°C, efficacy drops to 68% (loses 32%) of its 42.5kbtuh rated capacity. In other words, the Lynx 𝟰𝗛𝗣𝟭𝟴𝗩𝟯𝟲𝗣 can only deliver 28.77kBtuh resulting in 𝒓𝒖𝒏-𝒕𝒊𝒎𝒆 of 1.5 𝒙  𝑏𝑒𝑛𝑐ℎ𝑚𝑎𝑟𝑘 2. At sub-zero temperatures, the Lynx 𝟰𝗛𝗣𝟭𝟴𝗩𝟯𝟲𝗣 is inadequate to keeping your home warm and you would have to use auxiliary heat source 3. Reduced efficacy results in longer run-time which translates to increased Electricity consumption and overall energy costs. 4. For the months of Jul~ Aug, there should be ZERO consumption. This indicates a gas leakage of 1.75𝙢³/𝙙𝙖𝙮 Leakage: 630m³ (26%) Consumption: 1770m³ (74%) Total: 2400m³ I will stop here for now. In my next post we will learn to estimate electric energy needs for heat pump 😎 Tom Kirkman Joseph Fournier Mark Turnbull, MPM, MEng