Best Heat Pump Replacement Companies in Longmont, CO
Heat Pump Replacement in Longmont: sizing + authorization
A replacement or conversion is bid on Manual J load calculation, manufacturer authorization, and matched-system commissioning — oversizing is the #1 cause of comfort complaints. Here is what each of the 4 contractors below publishes: In Colorado, HVAC licensing is municipal (Denver requires a Class A or Class B mechanical license) — verify with your local building department before paying.
Top picks
Consistently strong customer feedback (4.9★ from 1,445+ Google reviews).
Google 4.9★ (1,445+)
Consistently strong customer feedback (4.9★ from 3,520+ Google reviews).
Google 4.9★ (3,520+)
Consistently strong customer feedback (4.9★ from 875+ Google reviews).
Google 4.9★ (875+)
Consistently strong customer feedback (4.8★ from 860+ Google reviews).
Google 4.8★ (860+)
Typical Heat Pump Replacement costs in Longmont, CO (2026)
Last updated
Estimated ranges for Longmont, CO. Actual cost varies with home size, equipment, and scope — always request a written quote for your job.
| Service | Typical range |
|---|---|
| Ducted air-source heat pump + air handler, full system (installed) | $8,300–$16,650 |
| Air handler replacement (paired with heat pump) | $1,550–$3,650 |
| Ductwork modification (resize / re-balance per Manual D) | $625–$2,300 |
What Longmont homeowners ask about Heat Pump Installation — answers from local data
- Can I replace my gas furnace with a heat pump?
- Yes — a heat pump both heats and cools, so it can fully replace a gas furnace. In colder areas a dual-fuel setup keeps the furnace as backup for the coldest days. Either way, insist on a Manual J load calculation; conversions can need duct resizing or an electrical upgrade.
- When is replacing an old heat pump better than repairing it?
- If it's past 12–15 years, still uses phased-out R-410A refrigerant, needs a compressor, or the repair bill approaches a third of replacement cost, replacing usually wins. A reputable contractor compares both paths before recommending.
- When should a Longmont homeowner consider full heat pump replacement rather than repair?
- Consider replacement when the unit repeatedly loses capacity during cold snaps, has frequent compressor faults, or when repairs approach the age of typical system life. Request diagnostics and a comparison of repair versus replacement plans from multiple contractors.
- What performance checks should a contractor run after installing a cold-climate heat pump in Longmont?
- Contractors should verify refrigerant charge, defrost control operation, airflow rates, and measured output at low outdoor temperatures. Ask for a written startup report and operating readings taken at representative cold conditions.
- How do I get a quote from these heat pump installation companies?
- Submit one request on this page and we send it to the vetted heat pump installation pros in Longmont, CO listed here. They send quotes back — no obligation.