- Brand
- Armstrong Air
- Efficiency
- 98% AFUE
- Heating control
- Modulating
- Purchase check
- Full model + written scope
Armstrong Air A98MVK
The modulating family deserves comparison with A972VK on minimum usable heat output and control strategy, not only the one-point headline AFUE difference. A home with a modest heating load may not benefit from a large modulating unit if its lowest available output still exceeds much of the seasonal requirement. Ask the designer to show the chosen size and explain operation during mild weather. The manufacturer technical sheet also describes thermostat flexibility; obtain the exact functions available with the particular control supplied.
Size, efficiency & equipment
| Brand | Armstrong Air |
|---|---|
| Model family | A98MVK |
| Fuel / equipment class | Natural gas; propane conversion only where explicitly approved for the exact model and kit |
| Efficiency | 98% AFUE |
| Burner stages / control | Modulating |
| Blower | Variable-speed |
| Input capacity, BTU/h | 66,000–132,000 BTU/h full input in the reviewed upflow/horizontal table. |
| Rated output, BTU/h | 64,000–127,000 BTU/h full output in the reviewed upflow/horizontal table. |
| Cabinet dimensions | 33 in cabinet height; widths vary by full model. Consult the linked dimension drawing for depth, openings and required installation space. |
| Canadian availability | Brand has Canadian-market evidence; exact model, orientation, certification and current local stock require confirmation. |
Manufacturer family headline / up to; confirm selected model.
Family maxima and ranges are not the specification of every size. Obtain the complete model suffix, current output rating and dimensional drawing. Cabinet dimensions do not include all service clearances.
Manufacturer pictures & technical drawings
Manufacturer picture and original source ↗ · Manufacturer-hosted; availability may change.
View manufacturer document on this page
Use the document’s dimensions or technical-data section. On a phone, the original PDF link may be easier to read. This is a manufacturer document, not an installation instruction from this guide.
What makes A98MVK worth comparing
The modulating family deserves comparison with A972VK on minimum usable heat output and control strategy, not only the one-point headline AFUE difference. A home with a modest heating load may not benefit from a large modulating unit if its lowest available output still exceeds much of the seasonal requirement. Ask the designer to show the chosen size and explain operation during mild weather. The manufacturer technical sheet also describes thermostat flexibility; obtain the exact functions available with the particular control supplied.
Capacity and physical fit
66,000–132,000 BTU/h full input in the reviewed upflow/horizontal table. 64,000–127,000 BTU/h full output in the reviewed upflow/horizontal table. 33 in cabinet height; widths vary by full model. Consult the linked dimension drawing for depth, openings and required installation space.
Review the proposed installation
Use a same-scope comparison for A98MVK: separate equipment, labour, vent route, condensate work, thermostat, filter cabinet, disposal and tax. Mark unresolved items as unknown instead of assigning them a zero cost. A remote assessment using postal context and photographs can help organize questions, but it cannot establish hidden site conditions or a fair maximum price. If a substantial price gap remains after the differences are explained, obtain an independent written second opinion.
The question that resolves the choice
The specific question to put to the installer is: What are the lowest and highest approved outputs of the selected size with the quoted control? Ask for the answer in writing, linked to the quoted A98MVK model and the work included. If the explanation changes after the visit, retain both versions and identify the newly observed condition. This gives a second reviewer useful evidence and avoids comparing an early allowance with a final assessed price as though they were the same promise.
Read the efficiency number in context
The published 98% figure for A98MVK is a family comparison point. Ask for the selected model’s own rating and keep that record with the proposal. It does not include every household energy expense, determine the price of fuel or establish the condition of the ducts. An operating-cost estimate should disclose its fuel-price and usage assumptions so a reviewer can reproduce the calculation rather than accept an unexplained saving.
Cost, reliability & alternatives
No universal Canadian installed price is asserted. Obtain dated CAD equipment and installed-scope amounts, tax treatment and local assessment; compare like-for-like written proposals.
No defensible comparative Canadian failure-rate ranking established.
Read the Armstrong Air brand assessment · Installed-price context · Compare this model
Sources & verification
Research snapshot: 11 October 2026. Confirm the current complete model, Canadian supply and warranty before purchase.