Allen Service is a Denver metro and Fort Collins HVAC and plumbing company with a 4.8-star rating across 2,299 Google reviews — one of the larger review bases in the region. Operating through two service areas (Denver Metro at (303) 529-7362 and Fort Collins at (970) 431-6574), the company handles heating, cooling, and plumbing for residential customers across a wide geographic footprint.

The company runs seasonal promotions that can provide meaningful value — currently a BOGO offer where buying a new A/C gets a furnace free, representing up to $2,500 in savings through April 30. Their website at allenservice.com supports online scheduling, financing options, and service area lookup.

Individual technician reviews reflect the range that comes with a 2,299-review base. Thomas was specifically praised for arriving on time, immediately putting on shoe covers, and handling a situation where the customer's HVAC system had essentially failed — installing replacement equipment professionally and courteously. Plumber Keith was recognized for outstanding customer service that exceeded the reviewer's expectations. The review record also includes critical feedback: one customer described a frustrating multi-appointment sequence with a plumbing repair, and another noted confusion about service coverage for a jetted tub repair. These experiences are worth noting, and prospective customers with unusual or specialty service requests may want to confirm scope coverage before scheduling.

Allen Service's combination of review volume, multi-trade service coverage, and active promotions makes them a significant presence in the Denver residential HVAC market. For homeowners looking for a full-service heating, cooling, and plumbing company with a large local track record and current equipment promotions, Allen is worth contacting.