| Furnace | Model | Replacement Core |
| NT-16S | 2009 | Stock# 2611A, Model # RP-16NQ |
| NT-16S | 2420 | Stock# 2611A, Model # RP-16NQ |
| - | - | - |
| NT-16SQ | 2425 | Stock# 2611A, Model # RP-16NQ |
| NT-16SQ | 2426 | Stock# 2611A, Model # RP-16NQ |
| NT-16SQ | 2444 | Stock# 2611A, Model # RP-16NQ |
| NT-16SQ | 2445 | Stock# 2611A, Model # RP-16NQ |
| - | - | - |
| NT-20S | 2019 | Stock# 2611A, Model # RP-16NQ |
| NT-20S | 2281 | Stock# 2611A, Model # RP-16NQ |
| - | - | - |
| NT-20SQ | 2432 | Stock# 2611A, Model# RP-16NQ |
| NT-20SQ | 2433A | Stock# 2611A, Model# RP-16NQ |
| NT-20SQ | 2450A | Stock# 2611A, Model# RP-16NQ |
| NT-20SQ | 2425A | Stock# 2611A, Model# RP-16NQ |
| - | - | - |
| NT-30SP | 2060 | Stock# 2613A, Model# RP-30N |
| NT-30SP | 2373 | Stock# 2613A, Model# RP-30N |
| NT-30SP | 2453 | Stock# 2613A, Model# RP-30N |
| - | - | - |
| NT-34SP | 2603 | Stock# 2613A, Model# RP-30N |
| NT-34SP | 2374 | Stock# 2613A, Model# RP-30N |
| NT-34SP | 2454 | Stock# 2613A, Model# RP-30N |
| - | - | - |
| NT-40 | 2051 | Stock# 2614A, Model# RP-40N |
| NT-40 | 2455 | Stock# 2614A, Model# RP-40N |
| - | - | - |
| P-40 | 2230 | Stock# 2615A, Model# RP-40P |
| P-40 | 2456 | Stock# 2615A, Model# RP-40P |
| - | - | - |
| NT-16SEQ | 2017 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2314 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2315 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2316 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2364 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2375 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2380 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2427 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2428 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2429 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2431 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2438 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2439 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2440 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2441 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2442 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2443 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2500 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2503 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2505 | Stock# 2612A, Model# RP-16NEQ |
| NT-16SEQ | 2507 | Stock# 2612A, Model# RP-16NEQ |
| - | - | - |
| NT-20SEQ | 2021 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2307 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2347 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2348 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2349 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2435 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2436 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2437 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2446 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2447 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2448 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2449 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2501 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2504 | Stock# 2612A, Model# RP-16NEQ |
| NT-20SEQ | 2506 | Stock# 2612A, Model# RP-16NEQ |
| - | - | - |
| SF-20 | 2324 | Stock# 2605A, Model# RP-20Q |
| SF-20 | 2381 | Stock# 2605A, Model# RP-20Q |
| - | - | - |
| SF-20Q | 2382 | Stock# 2605A, Model# RP-20Q |
| SF-20Q | 2385 | Stock# 2605A, Model# RP-20Q |
| SF-20Q | 2386 | Stock# 2605A, Model# RP-20Q |
| - | - | - |
| SF-20F | 2329 | Stock# 2606A, Model# RP-20FQ |
| - | - | - |
| SF-20FQ | 2389 | Stock# 2606A, Model# RP-20FQ |
| SF-20FQ | 2325 | Stock# 2606A, Model# RP-20FQ |
| - | - | - |
| SF-25 | 2320 | Stock# 2607A, Model# RP-30Q |
| SF-25 | 2325 | Stock# 2607A, Model# RP-30Q |
| - | - | - |
| SF-25Q | 2383 | Stock# 2607A, Model# RP-30Q |
| SF-25Q | 2387 | Stock# 2607A, Model# RP-30Q |
| - | - | - |
| SF-25F | 2330 | Stock# 2608A, Model# RP-30FQ |
| - | - | - |
| SF-25FQ | 2390 | Stock# 2608A, Model# RP-30FQ |
| SF-25FQ | 2467 | Stock# 2608A, Model# RP-30FQ |
| - | - | - |
| SF-30 | 2321 | Stock# 2607A, Model# RP-30Q |
| SF-30 | 2326 | Stock# 2607A, Model# RP-30Q |
| SF-30 | 2376 | Stock# 2607A, Model# RP-30Q |
| - | - | - |
| SF-30Q | 2384 | Stock# 2607A, Model# RP-30Q |
| SF-30Q | 2388 | Stock# 2607A, Model# RP-30Q |
| SF-30Q | 2481 | Stock# 2607A, Model# RP-30Q |
| SF-30Q | 2481 | Stock# 2607A, Model# RP-30Q |
| - | - | - |
| SF-30F | 2331 | Stock# 2608A, Model# RP-30FQ |
| - | - | - |
| SF-30FQ | 2391 | Stock# 2608A, Model# RP-30FQ |
| SF-30FQ | 2469 | Stock# 2608A, Model# RP-30FQ |
| SF-30FQ | 2484 | Stock# 2608A, Model# RP-30FQ |
| - | - | - |
| SF-35 | 2322 | Stock# 2609A, Model# RP-35Q |
| SF-35 | 2327 | Stock# 2609A, Model# RP-35Q |
| - | - | - |
| SF-35Q | 2398 | Stock# 2609A, Model# RP-35Q |
| SF-35Q | 2414 | Stock# 2609A, Model# RP-35Q |
| - | - | - |
| SF-35F | 2302 | Stock# 2610A, Model# RP-35FQ |
| SF-35F | 2332 | Stock# 2610A, Model# RP-35FQ |
| - | - | - |
| SF-35FQ | 2400 | Stock# 2610A, Model# RP-35FQ |
| - | - | - |
| SF-42 | 2323 | Stock# 2609A, Model# RP-35Q |
| SF-42 | 2328 | Stock# 2609A, Model# RP-35Q |
| - | - | - |
| SF-42Q | 2399 | Stock# 2609A, Model# RP-35Q |
| SF-42Q | 2415 | Stock# 2609A, Model# RP-35Q |
| SF-42Q | 2482 | Stock# 2609A, Model# RP-35Q |
| - | - | - |
| SF-42F | 2333 | Stock# 2610A, Model# RP-35FQ |
| - | - | - |
| SF-42FQ | 2401 | Stock# 2610A, Model# RP-35FQ |
