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Omega HCA replacement chassis unit is an ideal replacement and upgrade for the old McQuay HCA water-source heat pumps that were commonly installed in Toronto high-rise condominiums and commercial buildings’ heating and cooling systems.
The McQuay / Singer HCA Replacement Chassis is a direct-fit, drop-in solution for aging HCA vertical stack water-source heat pumps that were commonly installed in Toronto high-rise condominiums and commercial buildings.
At 4Most Energy, we supply and install Omega HCA replacement chassis that match the exact dimensions, riser connections, and electrical configurations of the original McQuay/Singer units — ensuring fast, clean, and professional replacements with no drywall or plumbing modifications.
Each unit comes factory-charged with R-410A refrigerant and features modern compressors, safety controls, and quiet operation, making it the perfect retrofit for older condos and commercial spaces.
| Omega Model | Replaces Existing HCA Model* | Nominal Size (Tons) |
|---|---|---|
| RPC-MC-HCA-030 | HC090A | 3/4 |
| RPC-MC-HCA-040 | HC120A / HC140A | 1 |
| RPC-MC-HCA-060 | HC200A | 1 ½ |
| RPC-MC-HCA-080 | HC230A | 2 |
* Only units without electric heat
NOTE: Replaces existing electrical box and controls with Omega electrical box kit.
HCA vertical stack heat pumps are typically found in high-rise condominium towers, office buildings, and mixed-use commercial spaces.
These systems use a central water loop to provide both heating and cooling through individual suite heat pumps — making them efficient and space-saving.
The Omega HCA replacement chassis is a direct-fit solution for these water-source systems, ideal for retrofitting existing condos in the Greater Toronto Area.
Designed for vertical stack systems with no demolition or pipe cutting required
Uses modern R-410A refrigerant for high efficiency
Delivers quiet operation — ideal for residential condos
Offers plug-and-play compatibility with existing McQuay wiring and risers
Backed by professional installation and warranty coverage from 4Most Energy
Check the model tag on your existing heat pump — typically located behind the front return air grille.
If the label says McQuay HCA, Singer HCA, or Daikin-McQuay, your unit qualifies for a direct Omega HCA replacement.
Not sure? 📸 Send a photo of your unit to 4Most Energy via WhatsApp, and our condo HVAC expert will confirm it for you.
Simply take a photo of your existing heating and cooling systems’s model label (behind the return grille) and send it to 4Most Energy via:
WhatsApp: 📲 Chat with 4Most Energy
Online Form: Submit your details on our website
Our technicians will verify the model, confirm the compatible Omega HCA replacement, and provide a detailed quote, usually the same day.
Every Omega Enerzone replacement installed by 4Most Energy includes:
1-Year Labour Warranty
5-Year Compressor Warranty
Parts coverage from Omega
Post-installation system check and testing
We also provide maintenance plans and priority service for condo corporations and property management companies.
We proudly provide Omega Enerzone heat pump replacements, installation, and maintenance across the Greater Toronto Area, including:
🏙️ Downtown Toronto, North York, Vaughan, Mississauga, Markham, Richmond Hill, Scarborough, Etobicoke, and surrounding communities.
We specialize in:
Condominium retrofit projects
High-rise and commercial building systems
Water-source heating and cooling solutions
✔ Specialized in Condo & High-Rise HVAC Systems
✔ TSSA-Certified installation technicians
✔ Local GTA expertise — we understand condo mechanical systems and by-laws
✔ Fast, clean installations with minimal disruption
✔ Full post-installation testing and warranty coverage
